Trifluoperazine interactions

Trifluoperazine (Stelazine), an antipsychotic has 366 documented interactions across the FDA labels and fact sheets we index: 117 major, 175 moderate, 72 minor, and 2 where a label reports no significant interaction. Each entry below quotes the sentence behind it. This drug page is a starting point, not a verdict for your situation.

Interactions from the label

Major interactions (117)

  • CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • AlcoholAlcoholMajor

    Combining alcohol with sedating medicines (opioids, benzodiazepines, sleep medicines, muscle relaxants) can cause dangerous drowsiness, slowed breathing, and overdose. (NIAAA, Harmful Interactions: Mixing Alcohol with Medicines)

  • AlprazolambenzodiazepineMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • Amoxapinetricyclic antidepressantMajor

    …the description of tardive dyskinesia and its clinical detection, please refer to the sections on Information for Patients and ADVERSE REACTIONS . ) Neuroleptic Malignant Syndrome (NMS) A potentially fatal symptom complex sometimes referred to as Neuroleptic Malignant Syndrome (NMS) has been reported in association with antipsychotic drugs and with amoxapine. (Amoxapine label, Warnings)

  • Articaine and epinephrinelocal anestheticMajor

    Other pressor agents, including epinephrine, should not be used as they may cause a paradoxical further lowering of blood pressure. (Trifluoperazine label, Precautions)

  • AtazanavirantiretroviralMajor

    …phenobarbital, phenytoin Antiarrhythmics Amiodarone (with ritonavir), quinidine (with ritonavir) Antimycobacterials Rifampin Antineoplastics Apalutamide, encorafenib, irinotecan, ivosidenib Antipsychotics Lurasidone (with ritonavir), pimozide Benzodiazepines Orally administered midazolam a , triazolam Ergot Derivatives Dihydroergotamine, ergonovine, ergotamine, methylergonovine… (Atazanavir label, Contraindications)

  • Azelastine and fluticasoneantihistamineMajor

    • Avoid concurrent use of alcohol or other central nervous system (CNS) depressants with azelastine hydrochloride and fluticasone propionate nasal spray because further decreased alertness and impairment of CNS performance may occur. (Azelastine and fluticasone label, Warnings and precautions)

  • Baclofenmuscle relaxantMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • Bromocriptinedopamine agonistMajor

    The concomitant use of CYCLOSET and dopamine receptor antagonists, including neuroleptic drugs, is not recommended. (Bromocriptine label, Warnings and precautions)

  • Bupivacaine and epinephrinelocal anestheticMajor

    Other pressor agents, including epinephrine, should not be used as they may cause a paradoxical further lowering of blood pressure. (Trifluoperazine label, Precautions)

  • BuprenorphineopioidMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • ButorphanolopioidMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • CarbamazepineanticonvulsantMajor

    CNS Depressants The concomitant use of EQUETRO and other CNS depressants can increase the risk of respiratory depression, profound sedation, hypotension, and syncope. (Carbamazepine label, Drug interactions)

  • CarbinoxamineantihistamineMajor

    Avoid concurrent use of Carbinoxamine Maleate Extended-Release Oral Suspension with alcohol or other central nervous system depressants because additional impairment of central nervous system performance may occur. (Carbinoxamine label, Warnings and precautions)

  • Carisoprodolmuscle relaxantMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • CetirizineantihistamineMajor

    Avoid concurrent use of QUZYTTIR with alcohol or other CNS depressants because additional reduction in alertness and additional impairment of CNS performance may occur. (Cetirizine label, Warnings and precautions)

  • ChlordiazepoxidebenzodiazepineMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • Chlorzoxazonemuscle relaxantMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • CiprofloxacinfluoroquinoloneMajor

    Table 8: Drugs That are Affected by and Affecting Ciprofloxacin Drugs That are Affected by Ciprofloxacin Drug(s) Recommendation Comments Tizanidine Contraindicated Concomitant administration of tizanidine and ciprofloxacin is contraindicated due to the potentiation of hypotensive and sedative effects of tizanidine [see Contraindications ( 4.2 )]. (Ciprofloxacin label, Drug interactions)

  • Clarithromycinmacrolide antibioticMajor

    Colchicine (in patients with normal renal and hepatic function) Use With Caution Antipsychotics: Pimozide Contraindicated Pimozide: [See Contraindications ( 4.2 )] Quetiapine Lurasidone Quetiapine: Quetiapine is a substrate for CYP3A4, which is inhibited by clarithromycin. (Clarithromycin label, Drug interactions)

  • ClobazambenzodiazepineMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • ClonazepambenzodiazepineMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • Clonidinealpha-adrenergic agonistMajor

    Avoid use with other central nervous system (CNS) depressants ( 5.3 ) (Clonidine label, Warnings and precautions)

  • ClorazepatebenzodiazepineMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • CodeineopioidMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • Cyclobenzaprinemuscle relaxantMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • Dantrolenemuscle relaxantMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • Daridorexantsedative-hypnoticMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • DarunavirantiretroviralMajor

    Alpha 1-adrenoreceptor antagonist: alfuzosin Anti-gout: colchicine, in patients with renal and/or hepatic impairment Antimycobacterial: rifampin Antipsychotics: lurasidone, pimozide Cardiac Disorders: dronedarone, ivabradine, ranolazine Ergot derivatives, e.g. dihydroergotamine, ergotamine, methylergonovine Herbal product: St. (Darunavir label, Contraindications)

  • Darunavir and cobicistatantiretroviralMajor

    …antagonist: alfuzosin Anticonvulsants: carbamazepine, phenobarbital, phenytoin Anti-gout: colchicine, in patients with renal and/or hepatic impairment Antimycobacterial: rifampin Antipsychotics: lurasidone, pimozide Cardiac Disorders: dronedarone, ivabradine, ranolazine Ergot derivatives, e.g. dihydroergotamine, ergotamine, methylergonovine Herbal product: St. (Darunavir and cobicistat label, Contraindications)

  • DeutetrabenazineVMAT2 inhibitorMajor

    Neuroleptic Malignant Syndrome (NMS) A potentially fatal symptom complex sometimes referred to as Neuroleptic Malignant Syndrome (NMS) has been reported in association with drugs that reduce dopaminergic transmission. (Deutetrabenazine label, Warnings and precautions)

  • DiazepambenzodiazepineMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • CONTRAINDICATIONS Diphenoxylate hydrochloride and atropine sulfate is contraindicated in: • Pediatric patients less than 6 years of age due to the risks of respiratory and central nervous system (CNS) depression (see WARNINGS ). (Diphenoxylate and atropine label, Contraindications)

  • Doxylamine and pyridoxineantihistamineMajor

    Central nervous system (CNS) depressants: Concurrent use with alcohol or other CNS depressants is not recommended ( 5.1 ) (Doxylamine and pyridoxine label, Warnings and precautions)

  • DronedaroneantiarrhythmicMajor

    …Clinical Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone… (Dronedarone label, Contraindications)

  • EluxadolineopioidMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • Alpha 1-adrenoreceptor antagonist: alfuzosin Anticonvulsants: carbamazepine, phenobarbital, phenytoin Antimycobacterial: rifampin Antipsychotics: lurasidone, pimozide Ergot Derivatives: dihydroergotamine, ergotamine, methylergonovine Herbal Products: St. (Elvitegravir, cobicistat, emtricitabine, and tenofovir label, Contraindications)

  • EpinephrinesympathomimeticMajor

    Other pressor agents, including epinephrine, should not be used as they may cause a paradoxical further lowering of blood pressure. (Trifluoperazine label, Precautions)

  • EstazolambenzodiazepineMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • Eszopiclonesedative-hypnoticMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • FentanylopioidMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • FlumazenilbenzodiazepineMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • FosamprenavirantiretroviralMajor

    …coadministered with the following drugs: Alpha 1-adrenoreceptor antagonist: Alfuzosin Antiarrhythmics: Flecainide (with ritonavir ), propafenone (with ritonavir ) Antimycobacterial: Rifampin Antipsychotic: Lurasidone (with ritonavir ), pimozide Ergot derivatives: Dihydroergotamine, ergonovine, ergotamine, methylergonovine GI motility agent: Cisapride Herbal product: St. (Fosamprenavir label, Contraindications)

  • GabapentinanticonvulsantMajor

    • Respiratory Depression: May occur with NEURONTIN when used with concomitant central nervous system (CNS) depressants, including opioids, or in the setting of underlying respiratory impairment. (Gabapentin label, Warnings and precautions)

  • HydrocodoneopioidMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • HydromorphoneopioidMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • HydroxyzineantihistamineMajor

    Rarely, cardiac arrests and death have been reported in association with the combined use of hydroxyzine hydrochloride intramuscularly and other CNS depressants. (Hydroxyzine label, Precautions)

  • KetamineCNS depressantMajor

    Benzodiazepines, Opioid Analgesics, or other CNS Depressants : Concomitant use may result in profound sedation, respiratory depression, coma, or death. (Ketamine label, Drug interactions)

  • Ketoconazoleazole antifungalMajor

    This may potentiate and prolong hypnotic and sedative effects, especially with repeated dosing or chronic administration of these agents. (Ketoconazole label, Contraindications)

  • Lemborexantsedative-hypnoticMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • LevocetirizineantihistamineMajor

    Avoid concurrent use of alcohol or other central nervous system depressants with XYZAL. (Levocetirizine label, Warnings and precautions)

  • LevorphanolopioidMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • Lidocaine and epinephrinelocal anestheticMajor

    Other pressor agents, including epinephrine, should not be used as they may cause a paradoxical further lowering of blood pressure. (Trifluoperazine label, Precautions)

  • Lopinavir and ritonavirantiretroviralMajor

    Alpha 1- Adrenoreceptor Antagonist: alfuzosin Antianginal: ranolazine Antiarrhythmic: dronedarone Anti-gout: colchicine Antipsychotics: lurasidone, pimozide Ergot Derivatives: dihydroergotamine, ergotamine, methylergonovine GI Motility Agent: cisapride Hepatitis C direct acting antiviral: elbasvir/grazoprevir HMG-CoA Reductase Inhibitors: lovastatin, simvastatin… (Lopinavir and ritonavir label, Contraindications)

  • LorazepambenzodiazepineMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • LumateperoneantipsychoticMajor

    Agranulocytosis (including fatal cases) has been reported with other antipsychotic drugs. (Lumateperone label, Warnings and precautions)

  • MeperidineopioidMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • Metaxalonemuscle relaxantMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • MethadoneopioidMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • Methocarbamolmuscle relaxantMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • MethohexitalbarbiturateMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • Metoclopramidedopamine antagonistMajor

    • Tardive Dyskinesia (TD), Other Extrapyramidal Symptoms (EPS), and Neuroleptic Malignant Syndrome (NMS) : Avoid concomitant use of other drugs known to cause TD/EPS/NMS and avoid use in patients with Parkinson’s Disease. (Metoclopramide label, Warnings and precautions)

  • MidazolambenzodiazepineMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • MorphineopioidMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • NalbuphineopioidMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • Nalmefeneopioid antagonistMajor

    Risk of Recurrent Respiratory and CNS Depression : A recurrence of respiratory depression is possible, therefore, keep the patient under continued surveillance and administer repeat doses of ZURNAI using a new auto-injector with each dose while awaiting emergency medical assistance. (Nalmefene label, Warnings and precautions)

  • …Antiarrhythmic: amiodarone, dronedarone, flecainide, propafenone, quinidine • Anti-gout: colchicine (in patients with renal and/or hepatic impairment [see Table 2 , Drug Interactions (7.3)] ) • Antipsychotics: lurasidone, pimozide • Benign prostatic hyperplasia agents: silodosin • Cardiovascular agents: eplerenone, ivabradine • Ergot derivatives: dihydroergotamine, ergotamine,… (Nirmatrelvir and ritonavir label, Contraindications)

  • OliceridineopioidMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • OlopatadineantihistamineMajor

    • Avoid concurrent use of alcohol or other central nervous system depressants with olopatadine hydrochloride nasal solution (nasal spray) ( 5.2 ). (Olopatadine label, Warnings and precautions)

  • Olopatadine and mometasoneantihistamineMajor

    • Avoid concurrent use of alcohol or other central nervous system (CNS) depressants with RYALTRIS because additional reductions in alertness and additional impairment of CNS performance may occur. (Olopatadine and mometasone label, Warnings and precautions)

  • Orphenadrinemuscle relaxantMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • OxazepambenzodiazepineMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • OxycodoneopioidMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • OxymorphoneopioidMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • PhenelzineMAO inhibitorMajor

    Phenelzine sulfate should not be used in combination with dextromethorphan or with CNS depressants such as alcohol and certain narcotics. (Phenelzine label, Contraindications)

  • PhenobarbitalbarbiturateMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • PregabalinanticonvulsantMajor

    • Respiratory Depression : May occur with LYRICA when used with concomitant CNS depressants or in the setting of underlying respiratory impairment. (Pregabalin label, Warnings and precautions)

  • Prilocaine and epinephrinelocal anestheticMajor

    Other pressor agents, including epinephrine, should not be used as they may cause a paradoxical further lowering of blood pressure. (Trifluoperazine label, Precautions)

  • PrimidoneanticonvulsantMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • Ramelteonsedative-hypnoticMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • RemifentanilopioidMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • RifampinantibioticMajor

    …Concomitant use of clopidogrel and rifampin should be discouraged Increase active metabolite exposure and risk of bleeding Ticagrelor Prevention or Management: Avoid use Decrease exposure Antipsychotics Haloperidol Decrease plasma concentrations by 70% Lurasidone Prevention or Management: Concomitant use is contraindicated (See CONTRAINDICATIONS ) Decrease exposure Oral… (Rifampin label, Drug interactions)

  • RitonavirantiretroviralMajor

    WARNING: DRUG-DRUG INTERACTIONS LEADING TO POTENTIALLY SERIOUS AND/OR LIFE THREATENING REACTIONS Co-administration of NORVIR with several classes of drugs including sedative hypnotics, antiarrhythmics, or ergot alkaloid preparations may result in potentially serious and/or life-threatening adverse events due to possible effects of NORVIR on the hepatic metabolism… (Ritonavir label, Boxed warning)

  • Sodium oxybateCNS depressantMajor

    • Central Nervous System Depression Xyrem (sodium oxybate) is a CNS depressant. (Sodium oxybate label, Boxed warning)

  • Suvorexantsedative-hypnoticMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • TapentadolopioidMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • Tasimelteonsedative-hypnoticMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • TemazepambenzodiazepineMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • TetrabenazineVMAT2 inhibitorMajor

    Neuroleptic Malignant Syndrome (NMS) A potentially fatal symptom complex sometimes referred to as Neuroleptic Malignant Syndrome (NMS) has been reported in association with tetrabenazine tablets and other drugs that reduce dopaminergic transmission [see Drug Interactions (7.6) ]. (Tetrabenazine label, Warnings and precautions)

  • ThioridazineantipsychoticMajor

    …proarrhythmic effects, thioridazine should be reserved for use in the treatment of schizophrenic patients who fail to show an acceptable response to adequate courses of treatment with other antipsychotic drugs, either because of insufficient effectiveness or the inability to achieve an effective dose due to intolerable adverse effects from those drugs (see WARNINGS , CONTRAINDICATIONS… (Thioridazine label, Boxed warning)

  • Tizanidinemuscle relaxantMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • TramadolopioidMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • TriazolambenzodiazepineMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • TrihexyphenidylanticholinergicMajor

    Neuroleptic Malignant Syndrome A potentially fatal symptom complex sometimes referred to as Neuroleptic Malignant Syndrome (NMS) has been reported in association with dose reduction or discontinuation of trihexyphenidyl. (Trihexyphenidyl label, Warnings)

  • Avoid trimethobenzamide hydrochloride capsules in patients receiving other drugs that are likely to cause EPS (e.g. antipsychotics) [see Drug Interactions (7.2) ] . (Trimethobenzamide label, Warnings and precautions)

  • ValbenazineVMAT2 inhibitorMajor

    Neuroleptic Malignant Syndrome (NMS ) A potentially fatal symptom complex referred to as Neuroleptic Malignant Syndrome (NMS) has been reported in association with drugs that reduce dopaminergic transmission. (Valbenazine label, Warnings and precautions)

  • Zaleplonsedative-hypnoticMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

  • ZiprasidoneantipsychoticMajor

    As with other antipsychotic drugs and placebo, sudden unexplained deaths have been reported in patients taking ziprasidone at recommended doses. (Ziprasidone label, Warnings and precautions)

  • Zolpidemsedative-hypnoticMajor

    CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage. (Trifluoperazine label, Contraindications)

Moderate interactions (175)

  • Acetazolamidecarbonic anhydrase inhibitorModerate

    Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • AclidiniumanticholinergicModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • Allopurinolxanthine oxidase inhibitorModerate

    Inform patients also that the central nervous system depressant effects of allopurinol tablets may be additive to those of alcohol and other CNS depressants. (Allopurinol label, Warnings and precautions)

  • AmantadineanticholinergicModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • Amiloridepotassium-sparing diureticModerate

    Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • AminophyllinemethylxanthineModerate

    25% increase Diazepam Benzodiazepines increase CNS concentrations of adenosine, a potent CNS depressant, while theophylline blocks adenosine receptors. (Aminophylline label, Drug interactions)

  • Amitriptylinetricyclic antidepressantModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • AripiprazoleantipsychoticModerate

    Long-Term Therapy To lessen the likelihood of adverse reactions related to cumulative drug effect, patients with a history of long-term therapy with trifluoperazine hydrochloride and/or other antipsychotics should be evaluated periodically to decide whether the maintenance dosage could be lowered or drug therapy discontinued. (Trifluoperazine label, Precautions)

  • AsenapineantipsychoticModerate

    Long-Term Therapy To lessen the likelihood of adverse reactions related to cumulative drug effect, patients with a history of long-term therapy with trifluoperazine hydrochloride and/or other antipsychotics should be evaluated periodically to decide whether the maintenance dosage could be lowered or drug therapy discontinued. (Trifluoperazine label, Precautions)

  • Atenolol and chlorthalidonebeta blockerModerate

    Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • AtropineanticholinergicModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • Atropine and pralidoximeanticholinergicModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • BenztropineanticholinergicModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • Sedatives/Hypnotics: midazolam (oral) triazolam ↑ midazolam (oral) ↑ triazolam Use caution when midazolam or triazolam is concomitantly administered with BIXLENVO. (Bictegravir, emtricitabine, and tenofovir alafenamide label, Drug interactions)

  • Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • BrexpiprazoleantipsychoticModerate

    Long-Term Therapy To lessen the likelihood of adverse reactions related to cumulative drug effect, patients with a history of long-term therapy with trifluoperazine hydrochloride and/or other antipsychotics should be evaluated periodically to decide whether the maintenance dosage could be lowered or drug therapy discontinued. (Trifluoperazine label, Precautions)

  • Brimonidinealpha-adrenergic agonistModerate

    Use with CNS depressants may result in an additive or potentiating effect. (Brimonidine label, Drug interactions)

  • Brimonidine and timololalpha-adrenergic agonistModerate

    Use with CNS depressants may result in an additive or potentiating effect. (Brimonidine and timolol label, Drug interactions)

  • BrivaracetamanticonvulsantModerate

    Phenothiazines may lower the convulsive threshold; dosage adjustments of anticonvulsants may be necessary. (Trifluoperazine label, Precautions)

  • Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • Bumetanideloop diureticModerate

    Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • Bupivacainelocal anestheticModerate

    Possible early warning signs of central nervous system (CNS) toxicity are restlessness, anxiety, incoherent speech, lightheadedness, numbness and tingling of the mouth and lips, metallic taste, tinnitus, dizziness, blurred vision, tremors, twitching, CNS depression, or drowsiness. (Bupivacaine label, Warnings and precautions)

  • BupropionantidepressantModerate

    The following conditions can also increase the risk of seizure: concomitant use of other medications that lower the seizure threshold (e.g., other bupropion products, antipsychotics, tricyclic antidepressants, theophylline, and systemic corticosteroids), metabolic disorders (e.g., hypoglycemia, hyponatremia, severe hepatic impairment, and hypoxia), or use of… (Bupropion label, Warnings and precautions)

  • Buspironeserotonergic drugModerate

    Triazolam/flurazepam: Coadministration of buspirone with either triazolam or flurazepam did not appear to prolong or intensify the sedative effects of either benzodiazepine. (Buspirone label, Drug interactions)

  • Candesartan and hydrochlorothiazideangiotensin II receptor blocker (ARB)Moderate

    Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • Cannabidiol (prescription)anticonvulsantModerate

    Phenothiazines may lower the convulsive threshold; dosage adjustments of anticonvulsants may be necessary. (Trifluoperazine label, Precautions)

  • CarbidopaModerate

    Hyperpyrexia and Confusion Sporadic cases of a symptom complex resembling neuroleptic malignant syndrome (NMS) have been reported in association with dose reductions or withdrawal of certain antiparkinsonian agents such as levodopa, carbidopa-levodopa, or carbidopa-levodopa extended release. (Carbidopa label, Warnings)

  • Carbidopa and levodopadopaminergic drugModerate

    Withdrawal-Emergent Hyperpyrexia and Confusion A symptom complex that resembles neuroleptic malignant syndrome (characterized by elevated temperature, muscular rigidity, altered consciousness, and autonomic instability), with no other obvious etiology, has been reported in association with rapid dose reduction, withdrawal of, or changes in dopaminergic therapy. (Carbidopa and levodopa label, Warnings and precautions)

  • Carbidopa, levodopa, and entacaponedopaminergic drugModerate

    Withdrawal-Emergent Hyperpyrexia and Confusion Cases of hyperpyrexia and confusion resembling neuroleptic malignant syndrome (NMS) have been reported in association with dose reduction or withdrawal of therapy with carbidopa, levodopa and entacapone. (Carbidopa, levodopa, and entacapone label, Warnings and precautions)

  • CariprazineantipsychoticModerate

    Long-Term Therapy To lessen the likelihood of adverse reactions related to cumulative drug effect, patients with a history of long-term therapy with trifluoperazine hydrochloride and/or other antipsychotics should be evaluated periodically to decide whether the maintenance dosage could be lowered or drug therapy discontinued. (Trifluoperazine label, Precautions)

  • CenobamateanticonvulsantModerate

    Phenothiazines may lower the convulsive threshold; dosage adjustments of anticonvulsants may be necessary. (Trifluoperazine label, Precautions)

  • Chlorothiazidethiazide diureticModerate

    Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • ChlorpheniramineantihistamineModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • ChlorpromazineantipsychoticModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • Chlorthalidonethiazide diureticModerate

    Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • CitalopramSSRIModerate

    Such drugs include Class 1A (e.g., quinidine, procainamide) or Class III (e.g., amiodarone, sotalol) antiarrhythmic medications, antipsychotic medications (e.g., chlorpromazine, thioridazine), antibiotics (e.g., gatifloxacin, moxifloxacin), or any other class of medications known to prolong the QTc interval (e.g., pentamidine, levomethadyl acetate, methadone). (Citalopram label, Warnings and precautions)

  • ClemastineantihistamineModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • Clomipraminetricyclic antidepressantModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • ClozapineantipsychoticModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • CyclopentolateanticholinergicModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • CyproheptadineantihistamineModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • DarifenacinanticholinergicModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • Desfluranegeneral anestheticModerate

    If agents such as sedatives, narcotics, anesthetics, tranquilizers or alcohol are used either simultaneously or successively with the drug, the possibility of an undesirable additive depressant effect should be considered. (Trifluoperazine label, Warnings)

  • Desipraminetricyclic antidepressantModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • DexchlorpheniramineantihistamineModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • DicyclomineanticholinergicModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • DimenhydrinateantihistamineModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • DiphenhydramineantihistamineModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • DisopyramideantiarrhythmicModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • Divalproex (valproate)anticonvulsantModerate

    Phenothiazines may lower the convulsive threshold; dosage adjustments of anticonvulsants may be necessary. (Trifluoperazine label, Precautions)

  • Doxepintricyclic antidepressantModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • DoxylamineantihistamineModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • DronabinolcannabinoidModerate

    Concomitant use of other drugs that cause dizziness, confusion, sedation, or somnolence such as CNS depressants may increase this effect (e.g., barbiturates, benzodiazepines, lithium, opioids, buspirone, scopolamine, antihistamines, tricyclic antidepressants, other anticholinergic agents, and muscle relaxants). (Dronabinol label, Warnings and precautions)

  • Droperidoldopamine antagonistModerate

    Since it may be difficult to distinguish neuroleptic malignant syndrome from malignant hyperpyrexia in the perioperative period, prompt treatment with dantrolene should be considered if increases in temperature, heart rate or carbon dioxide production occur. (Droperidol label, Warnings)

  • DroxidopasympathomimeticModerate

    Observe patients carefully when the dosage of NORTHERA is changed or when concomitant levodopa is reduced abruptly or discontinued, especially if the patient is receiving neuroleptics. (Droxidopa label, Warnings and precautions)

  • Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • Eplerenonealdosterone antagonistModerate

    Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • EslicarbazepineanticonvulsantModerate

    Phenothiazines may lower the convulsive threshold; dosage adjustments of anticonvulsants may be necessary. (Trifluoperazine label, Precautions)

  • Ethacrynic acidloop diureticModerate

    Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • EthosuximideanticonvulsantModerate

    Phenothiazines may lower the convulsive threshold; dosage adjustments of anticonvulsants may be necessary. (Trifluoperazine label, Precautions)

  • Etomidategeneral anestheticModerate

    If agents such as sedatives, narcotics, anesthetics, tranquilizers or alcohol are used either simultaneously or successively with the drug, the possibility of an undesirable additive depressant effect should be considered. (Trifluoperazine label, Warnings)

  • FelbamateanticonvulsantModerate

    Phenothiazines may lower the convulsive threshold; dosage adjustments of anticonvulsants may be necessary. (Trifluoperazine label, Precautions)

  • FesoterodineanticholinergicModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • FlavoxateanticholinergicModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • FlibanserinCNS depressantModerate

    Exacerbated by other CNS depressants, and in settings where flibanserin concentrations are increased. (Flibanserin label, Warnings and precautions)

  • FluoxetineSSRIModerate

    Coadministration of fluoxetine with other drugs that are metabolized by CYP2D6, including certain antidepressants (e.g., TCAs), antipsychotics (e.g., phenothiazines and most atypicals), and antiarrhythmics (e.g., propafenone, flecainide, and others) should be approached with caution. (Fluoxetine label, Drug interactions)

  • FluphenazineantipsychoticModerate

    Long-Term Therapy To lessen the likelihood of adverse reactions related to cumulative drug effect, patients with a history of long-term therapy with trifluoperazine hydrochloride and/or other antipsychotics should be evaluated periodically to decide whether the maintenance dosage could be lowered or drug therapy discontinued. (Trifluoperazine label, Precautions)

  • FluvoxamineSSRIModerate

    CNS Active Drugs Antipsychotics: See Warnings and Precautions ( 5.2 ) . (Fluvoxamine label, Drug interactions)

  • FosfomycinantibioticModerate

    Avoid co-administration of CONTEPO with drugs known to prolong the QT interval, such as class IA or class III antiarrhythmic medications, tricyclic antidepressants, macrolides, and antipsychotics [see Warnings and Precautions ( 5.2 )] . (Fosfomycin label, Drug interactions)

  • Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • FosphenytoinanticonvulsantModerate

    Phenothiazines may lower the convulsive threshold; dosage adjustments of anticonvulsants may be necessary. (Trifluoperazine label, Precautions)

  • Furosemideloop diureticModerate

    Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • GlimepiridesulfonylureaModerate

    …medications that may reduce the glucose-lowering effect of sulfonylureas including glimepiride, leading to worsening glycemic control: danazol, glucagon, somatropin, protease inhibitors, atypical antipsychotic medications (e.g., olanzapine and clozapine), barbiturates, diazoxide, laxatives, rifampin, thiazides and other diuretics, corticosteroids, phenothiazines, thyroid… (Glimepiride label, Drug interactions)

  • GlipizidesulfonylureaModerate

    The following are examples of medication that may reduce the glucose-lowering effect of GLUCOTROL XL, leading to worsening glycemic control: atypical antipsychotics (e.g., olanzapine and clozapine), corticosteroids, danazol, diuretics, estrogens, glucagon, isoniazid, niacin, oral contraceptives, phenothiazines, progestogens (e.g., in oral contraceptives), protease… (Glipizide label, Drug interactions)

  • GlycopyrrolateanticholinergicModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • Guanfacinealpha-adrenergic agonistModerate

    Consider the potential for additive sedative effects with CNS depressant drugs. (Guanfacine label, Warnings and precautions)

  • HaloperidolantipsychoticModerate

    Long-Term Therapy To lessen the likelihood of adverse reactions related to cumulative drug effect, patients with a history of long-term therapy with trifluoperazine hydrochloride and/or other antipsychotics should be evaluated periodically to decide whether the maintenance dosage could be lowered or drug therapy discontinued. (Trifluoperazine label, Precautions)

  • Hydrochlorothiazidethiazide diureticModerate

    Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • HyoscyamineanticholinergicModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • IloperidoneantipsychoticModerate

    Long-Term Therapy To lessen the likelihood of adverse reactions related to cumulative drug effect, patients with a history of long-term therapy with trifluoperazine hydrochloride and/or other antipsychotics should be evaluated periodically to decide whether the maintenance dosage could be lowered or drug therapy discontinued. (Trifluoperazine label, Precautions)

  • Imipraminetricyclic antidepressantModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • Indapamidethiazide diureticModerate

    Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • Insulin aspartinsulinModerate

    Drugs That May Decrease the Blood Glucose Lowering Effect of Insulin Aspart Drugs: Atypical antipsychotics (e.g., olanzapine and clozapine), corticosteroids, danazol, diuretics, estrogens, glucagon, isoniazid, niacin, oral contraceptives, phenothiazines, progestogens (e.g., in oral contraceptives), protease inhibitors, somatropin, sympathomimetic agents (e.g.,… (Insulin aspart label, Drug interactions)

  • Insulin degludecinsulinModerate

    Drugs That May Decrease the Blood Glucose Lowering Effect of Insulin Degludec Drugs: Atypical antipsychotics (e.g., olanzapine and clozapine), corticosteroids, danazol, diuretics, estrogens, glucagon, isoniazid, niacin, oral contraceptives, phenothiazines, progestogens (e.g., in oral contraceptives), protease inhibitors, somatropin, sympathomimetic agents (e.g.,… (Insulin degludec label, Drug interactions)

  • Insulin detemirinsulinModerate

    Drugs That May Decrease the Blood Glucose Lowering Effect of LEVEMIR Drugs: Atypical antipsychotics (e.g., olanzapine and clozapine), corticosteroids, danazol, diuretics, estrogens, glucagon, isoniazid, niacin, oral contraceptives, phenothiazines, progestogens (e.g., in oral contraceptives), protease inhibitors, somatropin, sympathomimetic agents (e.g., albuterol,… (Insulin detemir label, Drug interactions)

  • Insulin glargineinsulinModerate

    Drugs that May Decrease the Blood Glucose Lowering Effect of Insulin Glargine-yfgn Drugs: Atypical antipsychotics (e.g., olanzapine and clozapine), corticosteroids, danazol, diuretics, estrogens, glucagon, isoniazid, niacin, oral contraceptives, phenothiazines, progestogens (e.g., in oral contraceptives), protease inhibitors, somatropin, sympathomimetic agents… (Insulin glargine label, Drug interactions)

  • Insulin lisproinsulinModerate

    Drugs That May Decrease the Blood Glucose Lowering Effect of LYUMJEV Drugs: Atypical antipsychotics (e.g., olanzapine and clozapine), corticosteroids, danazol, diuretics, estrogens, glucagon, isoniazid, niacin, oral contraceptives, phenothiazines, progestogens (e.g., in oral contraceptives), protease inhibitors, somatropin, sympathomimetic agents (e.g., albuterol,… (Insulin lispro label, Drug interactions)

  • IpratropiumanticholinergicModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • Ipratropium and albuterolanticholinergicModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • Irbesartan and hydrochlorothiazideangiotensin II receptor blocker (ARB)Moderate

    Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • Isofluranegeneral anestheticModerate

    If agents such as sedatives, narcotics, anesthetics, tranquilizers or alcohol are used either simultaneously or successively with the drug, the possibility of an undesirable additive depressant effect should be considered. (Trifluoperazine label, Warnings)

  • Itraconazoleazole antifungalModerate

    Antipsychotics, Anxiolytics and Hypnotics Alprazolam Aripiprazole Buspirone Diazepam Haloperidol Midazolam (IV) Quetiapine Ramelteon Risperidone Suvorexant Monitor for adverse reactions. (Itraconazole label, Drug interactions)

  • LacosamideanticonvulsantModerate

    Phenothiazines may lower the convulsive threshold; dosage adjustments of anticonvulsants may be necessary. (Trifluoperazine label, Precautions)

  • LamotrigineanticonvulsantModerate

    Phenothiazines may lower the convulsive threshold; dosage adjustments of anticonvulsants may be necessary. (Trifluoperazine label, Precautions)

  • LevetiracetamanticonvulsantModerate

    Phenothiazines may lower the convulsive threshold; dosage adjustments of anticonvulsants may be necessary. (Trifluoperazine label, Precautions)

  • Levodopadopaminergic drugModerate

    Withdrawal-Emergent Hyperpyrexia and Confusion A symptom complex that resembles neuroleptic malignant syndrome (characterized by elevated temperature, muscular rigidity, altered consciousness, and autonomic instability), with no other obvious etiology, has been reported in association with rapid dose reduction, withdrawal of, or changes in dopaminergic therapy. (Levodopa label, Warnings and precautions)

  • Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • Lithiumserotonergic drugModerate

    Because of a possible causal relationship between these events and the concomitant administration of lithium and antipsychotics, patients receiving such combined therapy should be monitored closely for early evidence of neurologic toxicity and treatment discontinued promptly if such signs appear. (Trifluoperazine label, Warnings)

  • Lofexidinealpha-adrenergic agonistModerate

    Increased Risk of CNS Depression with Concomitant use of CNS Depressant Drugs : Lofexidine tablets potentiates the CNS depressant effects of benzodiazepines and may potentiate the CNS depressant effects of alcohol, barbiturates, and other sedating drugs. (Lofexidine label, Warnings and precautions)

  • LoperamideQT-prolonging drugModerate

    …others drugs or herbal products that are known to prolong the QT interval, including Class 1A (e.g., quinidine, procainamide) or Class III (e.g., amiodarone, sotalol) antiarrhythmics, antipsychotics (e.g., chlorpromazine, haloperidol, thioridazine, ziprasidone), antibiotics (e.g., moxifloxacin), or any other drug known to prolong the QT interval (e.g., pentamidine,… (Loperamide label, Warnings)

  • Losartan and hydrochlorothiazideangiotensin II receptor blocker (ARB)Moderate

    Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • LoxapineantipsychoticModerate

    Long-Term Therapy To lessen the likelihood of adverse reactions related to cumulative drug effect, patients with a history of long-term therapy with trifluoperazine hydrochloride and/or other antipsychotics should be evaluated periodically to decide whether the maintenance dosage could be lowered or drug therapy discontinued. (Trifluoperazine label, Precautions)

  • LurasidoneantipsychoticModerate

    Long-Term Therapy To lessen the likelihood of adverse reactions related to cumulative drug effect, patients with a history of long-term therapy with trifluoperazine hydrochloride and/or other antipsychotics should be evaluated periodically to decide whether the maintenance dosage could be lowered or drug therapy discontinued. (Trifluoperazine label, Precautions)

  • MeclizineantihistamineModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • MeprobamateCNS depressantModerate

    Additive Effects Since the effects of meprobamate and alcohol or meprobamate and other CNS depressants or psychotropic drugs may be additive,appropriate caution should be exercised with patients who take more than one of these agents simultaneously. (Meprobamate label, Warnings)

  • MethscopolamineanticholinergicModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • MethsuximideanticonvulsantModerate

    Phenothiazines may lower the convulsive threshold; dosage adjustments of anticonvulsants may be necessary. (Trifluoperazine label, Precautions)

  • Metolazonethiazide diureticModerate

    Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • MetyrosineModerate

    Concurrent use of metyrosine with alcohol or other CNS depressants can increase their sedative effects. (Metyrosine label, Drug interactions)

  • MoxifloxacinfluoroquinoloneModerate

    Pharmacokinetic studies between moxifloxacin and other drugs that prolong the QT interval such as cisapride, erythromycin, antipsychotics, and tricyclic antidepressants have not been performed. (Moxifloxacin label, Warnings and precautions)

  • Naloxoneopioid antagonistModerate

    WARNINGS AND PRECAUTIONS Risk of Recurrent Respiratory and CNS Depression : Due to the duration of action of naloxone relative to the opioid, respiratory and CNS depression may recur after the first dose of naloxone. (Naloxone label, Warnings and precautions)

  • Naltrexone and bupropionopioid antagonistModerate

    …medications (sulfonylureas and meglitinides) that may cause hypoglycemia concomitant administration of medications that may lower the seizure threshold, including other bupropion products, antipsychotics, tricyclic antidepressants, theophylline, systemic steroids Recommendations for Reducing the Risk of Seizure: Clinical experience with bupropion suggests that the risk… (Naltrexone and bupropion label, Warnings and precautions)

  • Nortriptylinetricyclic antidepressantModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • OlanzapineantipsychoticModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • Olanzapine and fluoxetineantipsychoticModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • Olmesartan and hydrochlorothiazideangiotensin II receptor blocker (ARB)Moderate

    Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • Olmesartan, amlodipine, and hydrochlorothiazideangiotensin II receptor blocker (ARB)Moderate

    Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • OxcarbazepineanticonvulsantModerate

    Phenothiazines may lower the convulsive threshold; dosage adjustments of anticonvulsants may be necessary. (Trifluoperazine label, Precautions)

  • OxybutyninanticholinergicModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • PaliperidoneantipsychoticModerate

    Long-Term Therapy To lessen the likelihood of adverse reactions related to cumulative drug effect, patients with a history of long-term therapy with trifluoperazine hydrochloride and/or other antipsychotics should be evaluated periodically to decide whether the maintenance dosage could be lowered or drug therapy discontinued. (Trifluoperazine label, Precautions)

  • ParoxetineSSRIModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • PerampanelanticonvulsantModerate

    Phenothiazines may lower the convulsive threshold; dosage adjustments of anticonvulsants may be necessary. (Trifluoperazine label, Precautions)

  • PerphenazineantipsychoticModerate

    Long-Term Therapy To lessen the likelihood of adverse reactions related to cumulative drug effect, patients with a history of long-term therapy with trifluoperazine hydrochloride and/or other antipsychotics should be evaluated periodically to decide whether the maintenance dosage could be lowered or drug therapy discontinued. (Trifluoperazine label, Precautions)

  • Phentermine and topiramateCNS stimulantModerate

    Phenothiazines may lower the convulsive threshold; dosage adjustments of anticonvulsants may be necessary. (Trifluoperazine label, Precautions)

  • PhenytoinanticonvulsantModerate

    However, it has been reported that phenothiazines may interfere with the metabolism of phenytoin and thus precipitate phenytoin toxicity. (Trifluoperazine label, Precautions)

  • PimavanserinantipsychoticModerate

    Long-Term Therapy To lessen the likelihood of adverse reactions related to cumulative drug effect, patients with a history of long-term therapy with trifluoperazine hydrochloride and/or other antipsychotics should be evaluated periodically to decide whether the maintenance dosage could be lowered or drug therapy discontinued. (Trifluoperazine label, Precautions)

  • PimozideantipsychoticModerate

    Long-Term Therapy To lessen the likelihood of adverse reactions related to cumulative drug effect, patients with a history of long-term therapy with trifluoperazine hydrochloride and/or other antipsychotics should be evaluated periodically to decide whether the maintenance dosage could be lowered or drug therapy discontinued. (Trifluoperazine label, Precautions)

  • Pioglitazone and glimepiridethiazolidinedioneModerate

    …medications that may reduce the glucose-lowering effect of sulfonylureas including glimepiride, leading to worsening glycemic control: danazol, glucagon, somatropin, protease inhibitors, atypical antipsychotic medications (e.g., olanzapine and clozapine), barbiturates, diazoxide, laxatives, rifampin, thiazides and other diuretics, corticosteroids, phenothiazines, thyroid… (Pioglitazone and glimepiride label, Drug interactions)

  • Posaconazoleazole antifungalModerate

    Concomitant Use with Midazolam : Noxafil can prolong hypnotic/sedative effects. (Posaconazole label, Warnings and precautions)

  • Pramipexoledopamine agonistModerate

    Hyperpyrexia and Confusion Although not reported with pramipexole in the clinical development program, a symptom complex resembling the neuroleptic malignant syndrome (characterized by elevated temperature, muscular rigidity, altered consciousness, and autonomic instability), with no other obvious etiology, has been reported in association with rapid dose reduction,… (Pramipexole label, Warnings and precautions)

  • ProchlorperazineantipsychoticModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • PromethazineantihistamineModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • PropofolCNS depressantModerate

    If agents such as sedatives, narcotics, anesthetics, tranquilizers or alcohol are used either simultaneously or successively with the drug, the possibility of an undesirable additive depressant effect should be considered. (Trifluoperazine label, Warnings)

  • Propranololbeta blockerModerate

    Concomitant administration of propranolol with phenothiazines results in increased plasma levels of both drugs. (Trifluoperazine label, Precautions)

  • Protriptylinetricyclic antidepressantModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • QuetiapineantipsychoticModerate

    Long-Term Therapy To lessen the likelihood of adverse reactions related to cumulative drug effect, patients with a history of long-term therapy with trifluoperazine hydrochloride and/or other antipsychotics should be evaluated periodically to decide whether the maintenance dosage could be lowered or drug therapy discontinued. (Trifluoperazine label, Precautions)

  • Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • RanolazineQT-prolonging drugModerate

    Drugs Metabolized by CYP2D6 The exposure to CYP2D6 substrates, such as tricyclic antidepressants and antipsychotics, may be increased during co-administration with ASPRUZYO Sprinkle, and lower doses of these drugs may be required. (Ranolazine label, Drug interactions)

  • RasagilineMAO inhibitorModerate

    Withdrawal-Emergent Hyperpyrexia and Confusion A symptom complex resembling neuroleptic malignant syndrome (characterized by elevated temperature, muscular rigidity, altered consciousness, and autonomic instability), with no other obvious etiology, has been reported in association with rapid dose reduction, withdrawal of, or changes in drugs that increase central… (Rasagiline label, Warnings and precautions)

  • RifapentineantibioticModerate

    …doxycycline; Fluoroquinolones (such as ciprofloxacin) Oral Anticoagulants Warfarin Anticonvulsants Phenytoin Antimalarials Quinine Azole Antifungals Fluconazole, itraconazole, ketoconazole Antipsychotics Haloperidol Barbiturates Phenobarbital Benzodiazepines Diazepam Beta-Blockers Propranolol Calcium Channel Blockers Diltiazem, nifedipine, verapamil Cardiac Glycoside… (Rifapentine label, Drug interactions)

  • RisperidoneantipsychoticModerate

    Long-Term Therapy To lessen the likelihood of adverse reactions related to cumulative drug effect, patients with a history of long-term therapy with trifluoperazine hydrochloride and/or other antipsychotics should be evaluated periodically to decide whether the maintenance dosage could be lowered or drug therapy discontinued. (Trifluoperazine label, Precautions)

  • Ropiniroledopamine agonistModerate

    Withdrawal-Emergent Hyperpyrexia and Confusion A symptom complex resembling the neuroleptic malignant syndrome (characterized by elevated temperature, muscular rigidity, altered consciousness, and autonomic instability), with no other obvious etiology, has been reported in association with rapid dose reduction of, withdrawal of, or changes in, dopaminergic therapy. (Ropinirole label, Warnings and precautions)

  • RufinamideanticonvulsantModerate

    Phenothiazines may lower the convulsive threshold; dosage adjustments of anticonvulsants may be necessary. (Trifluoperazine label, Precautions)

  • ScopolamineanticholinergicModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • SelegilineMAO inhibitorModerate

    Withdrawal Emergent Hyperpyrexia and Confusion Although not reported with ZELAPAR in the clinical development program, a symptom complex resembling the neuroleptic malignant syndrome (characterized by elevated temperature, muscular rigidity, altered consciousness, and autonomic instability), with no other obvious etiology, has been reported in association with… (Selegiline label, Warnings and precautions)

  • Sevofluranegeneral anestheticModerate

    If agents such as sedatives, narcotics, anesthetics, tranquilizers or alcohol are used either simultaneously or successively with the drug, the possibility of an undesirable additive depressant effect should be considered. (Trifluoperazine label, Warnings)

  • SolifenacinanticholinergicModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • Spironolactonealdosterone antagonistModerate

    Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • Spironolactone and hydrochlorothiazidealdosterone antagonistModerate

    Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • Telmisartan and hydrochlorothiazideangiotensin II receptor blocker (ARB)Moderate

    Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • TheophyllinemethylxanthineModerate

    25% increase Diazepam Benzodiazepines increase CNS concentrations of adenosine, a potent CNS depressant, while theophylline blocks adenosine receptors. (Theophylline label, Drug interactions)

  • ThiothixeneantipsychoticModerate

    Long-Term Therapy To lessen the likelihood of adverse reactions related to cumulative drug effect, patients with a history of long-term therapy with trifluoperazine hydrochloride and/or other antipsychotics should be evaluated periodically to decide whether the maintenance dosage could be lowered or drug therapy discontinued. (Trifluoperazine label, Precautions)

  • TiagabineanticonvulsantModerate

    Phenothiazines may lower the convulsive threshold; dosage adjustments of anticonvulsants may be necessary. (Trifluoperazine label, Precautions)

  • TiotropiumanticholinergicModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • TolcaponeModerate

    Hyperpyrexia and Confusion: In clinical trials, four cases of a symptom complex resembling the neuroleptic malignant syndrome (characterized by elevated temperature, muscular rigidity, and altered consciousness), similar to that reported in association with the rapid dose reduction or withdrawal of other dopaminergic drugs, have been reported in association with… (Tolcapone label, Precautions)

  • TolterodineanticholinergicModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • TopiramateanticonvulsantModerate

    Phenothiazines may lower the convulsive threshold; dosage adjustments of anticonvulsants may be necessary. (Trifluoperazine label, Precautions)

  • Toremifeneselective estrogen receptor modulatorModerate

    …accepted to prolong QT interval include Class 1A (e.g., quinidine, procainamide, disopyramide) and Class III (e.g., amiodarone, sotalol, ibutilide, dofetilide) antiarrhythmics; certain antipsychotics (e.g., thioridazine, haloperidol); certain antidepressants (e.g., venlafaxine, amitriptyline); certain antibiotics (e.g., erythromycin, clarithromycin, levofloxacin,… (Toremifene label, Drug interactions)

  • Torsemideloop diureticModerate

    Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • TranylcypromineMAO inhibitorModerate

    Excessive reduction of blood glucose (additive effect) f CNS depressant agents (including opioids, alcohol, sedatives, hypnotics) Use with caution d Increased CNS depression Dietary supplements containing sympathomimetics Contraindicated a Antidepressants including but not limited to: Other MAOIs (e.g., linezolid, intravenous methylene blue, selective MAOIs)… (Tranylcypromine label, Drug interactions)

  • TrazodoneantidepressantModerate

    …are inhibitors of CYP3A4 (e.g., itraconazole, clarithromycin, voriconazole), or known to prolong QT interval including Class 1A antiarrhythmics (e.g., quinidine, procainamide) or Class 3 antiarrhythmics (e.g., amiodarone, sotalol), certain antipsychotic medications (e.g., ziprasidone, chlorpromazine, thioridazine), and certain antibiotics (e.g., gatifloxacin). (Trazodone label, Warnings and precautions)

  • Triamterenepotassium-sparing diureticModerate

    Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • Triamterene and hydrochlorothiazidepotassium-sparing diureticModerate

    Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • Trimipraminetricyclic antidepressantModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • TrospiumanticholinergicModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • UmeclidiniumanticholinergicModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • Umeclidinium and vilanterolanticholinergicModerate

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primary central nervous system (CNS) pathology. (Trifluoperazine label, Warnings)

  • Valproic acidanticonvulsantModerate

    Phenothiazines may lower the convulsive threshold; dosage adjustments of anticonvulsants may be necessary. (Trifluoperazine label, Precautions)

  • Valsartan and hydrochlorothiazideangiotensin II receptor blocker (ARB)Moderate

    Thiazide diuretics may accentuate the orthostatic hypotension that may occur with phenothiazines. (Trifluoperazine label, Precautions)

  • VigabatrinanticonvulsantModerate

    Phenothiazines may lower the convulsive threshold; dosage adjustments of anticonvulsants may be necessary. (Trifluoperazine label, Precautions)

  • Voriconazoleazole antifungalModerate

    Eszopiclone (CYP3A4 Inhibition) Not Studied In Vivo or In Vitro , but Drug Plasma Exposure Likely to be Increased which may Increase the Sedative Effect of Eszopiclone Dose reduction of eszopiclone is recommended. (Voriconazole label, Drug interactions)

  • ZonisamideanticonvulsantModerate

    Phenothiazines may lower the convulsive threshold; dosage adjustments of anticonvulsants may be necessary. (Trifluoperazine label, Precautions)

Minor mentions (72)

  • Acebutololbeta blockerMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • AliskirenantihypertensiveMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • Amlodipinedihydropyridine calcium channel blockerMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • Amlodipine and atorvastatindihydropyridine calcium channel blockerMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • Amlodipine and benazeprildihydropyridine calcium channel blockerMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • Amlodipine and olmesartandihydropyridine calcium channel blockerMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • Amlodipine and valsartandihydropyridine calcium channel blockerMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • ApixabananticoagulantMinor

    Phenothiazines may diminish the effect of oral anticoagulants. (Trifluoperazine label, Precautions)

  • ArgatrobananticoagulantMinor

    Phenothiazines may diminish the effect of oral anticoagulants. (Trifluoperazine label, Precautions)

  • Atenololbeta blockerMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • Atomoxetinenorepinephrine reuptake inhibitorMinor

    Some cases presented with features resembling neuroleptic malignant syndrome. (Atomoxetine label, Drug interactions)

  • Azilsartanangiotensin II receptor blocker (ARB)Minor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • BenazeprilACE inhibitorMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • Betaxololbeta blockerMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • Bisoprololbeta blockerMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • BivalirudinanticoagulantMinor

    Phenothiazines may diminish the effect of oral anticoagulants. (Trifluoperazine label, Precautions)

  • Candesartanangiotensin II receptor blocker (ARB)Minor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • CaptoprilACE inhibitorMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • Carvedilolbeta blockerMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • DabigatrananticoagulantMinor

    Phenothiazines may diminish the effect of oral anticoagulants. (Trifluoperazine label, Precautions)

  • DextroamphetamineCNS stimulantMinor

    Antihistamines Amphetamines may counteract the sedative effect of antihistamines. (Dextroamphetamine label, Drug interactions)

  • Diltiazemcalcium channel blockerMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • In Drug-Induced CNS and Respiratory Depression Doxapram alone may not stimulate adequate spontaneous breathing or provide sufficient arousal in patients who are severely depressed either due to respiratory failure or to CNS depressant drugs, but may be used as an adjunct to established supportive measures and resuscitative techniques. (Doxapram label, Warnings)

  • Doxazosinalpha blockerMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • EdoxabananticoagulantMinor

    Phenothiazines may diminish the effect of oral anticoagulants. (Trifluoperazine label, Precautions)

  • EnalaprilACE inhibitorMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • EnalaprilatACE inhibitorMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • EnoxaparinanticoagulantMinor

    Phenothiazines may diminish the effect of oral anticoagulants. (Trifluoperazine label, Precautions)

  • The “gasping syndrome” is characterized by central nervous system (CNS) depression, metabolic acidosis, and gasping respirations. (Epoetin alfa label, Warnings and precautions)

  • Felodipinedihydropyridine calcium channel blockerMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • FondaparinuxanticoagulantMinor

    Phenothiazines may diminish the effect of oral anticoagulants. (Trifluoperazine label, Precautions)

  • FosinoprilACE inhibitorMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • GranisetronQT-prolonging drugMinor

    There have been no definitive drug-drug interaction studies to examine pharmacokinetic or pharmacodynamic interaction with other drugs; however, in humans, granisetron hydrochloride injection has been safely administered with drugs representing benzodiazepines, neuroleptics and anti-ulcer medications commonly prescribed with antiemetic treatments. (Granisetron label, Drug interactions)

  • HeparinanticoagulantMinor

    Phenothiazines may diminish the effect of oral anticoagulants. (Trifluoperazine label, Precautions)

  • HydralazinevasodilatorMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • Atypical Antipsychotics (e.g., olanzapine and clozapine), Corticosteroids, Danazol, Diuretics, Estrogens, Glucagon, Isoniazid, Niacin, Oral Contraceptives, Phenothiazines, Progestogens (e.g., in oral contraceptives), Protease inhibitors, Somatropin, Sympathomimetic Agents (e.g., albuterol, epinephrine, terbutaline) and Thyroid Hormones. (Insulin regular (human) label, Drug interactions)

  • Irbesartanangiotensin II receptor blocker (ARB)Minor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • Isradipinedihydropyridine calcium channel blockerMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • Labetalolbeta blockerMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • LisinoprilACE inhibitorMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • Losartanangiotensin II receptor blocker (ARB)Minor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • MecamylamineantihypertensiveMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • MethyldopaantihypertensiveMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • Metoprololbeta blockerMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • MinoxidilvasodilatorMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • MoexiprilACE inhibitorMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • Nadololbeta blockerMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • Nebivololbeta blockerMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • NefazodoneantidepressantMinor

    Some cases presented with features resembling neuroleptic malignant syndrome. (Nefazodone label, Warnings)

  • Nicardipinedihydropyridine calcium channel blockerMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • Nifedipinedihydropyridine calcium channel blockerMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • Nisoldipinedihydropyridine calcium channel blockerMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • NitroprussidevasodilatorMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • Olmesartanangiotensin II receptor blocker (ARB)Minor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • PerindoprilACE inhibitorMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • Phenoxybenzaminealpha blockerMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • PhenylephrinedecongestantMinor

    If a vasoconstrictor is required, norepinephrine bitartrate and phenylephrine hydrochloride are suitable. (Trifluoperazine label, Precautions)

  • Pindololbeta blockerMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • Prazosinalpha blockerMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • QuinaprilACE inhibitorMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • RamiprilACE inhibitorMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • RepaglinidemeglitinideMinor

    Examples: Atypical antipsychotics (e.g., olanzapine and clozapine), calcium channel antagonists, corticosteroids, danazol, diuretics, estrogens, glucagon, isoniazid, niacin, oral contraceptives, phenothiazines, progestogens (e.g., in oral contraceptives), protease inhibitors, somatropin, sympathomimetic agents (e.g., albuterol, epinephrine, terbutaline), and… (Repaglinide label, Drug interactions)

  • RivaroxabananticoagulantMinor

    Phenothiazines may diminish the effect of oral anticoagulants. (Trifluoperazine label, Precautions)

  • Sacubitril and valsartanangiotensin II receptor blocker (ARB)Minor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • Telmisartanangiotensin II receptor blocker (ARB)Minor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • Telmisartan and amlodipineangiotensin II receptor blocker (ARB)Minor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • Terazosinalpha blockerMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • TrandolaprilACE inhibitorMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • Valsartanangiotensin II receptor blocker (ARB)Minor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • Verapamilcalcium channel blockerMinor

    Antihypertensive effects of guanethidine and related compounds may be counteracted when phenothiazines are used concurrently. (Trifluoperazine label, Precautions)

  • WarfarinanticoagulantMinor

    Phenothiazines may diminish the effect of oral anticoagulants. (Trifluoperazine label, Precautions)

No significant interaction reported (2)

  • LenacapavirantiretroviralNo interaction

    Sedatives/Hypnotics: midazolam (oral) triazolam ↑ midazolam (oral) ↑ triazolam Use with caution when midazolam or triazolam is concomitantly administered with SUNLENCA 7.4 Drugs without Clinically Significant Interactions with SUNLENCA Based on drug interaction studies conducted with SUNLENCA, no clinically significant drug interactions have been observed with:… (Lenacapavir label, Drug interactions)

  • Montelukastleukotriene receptor antagonistNo interaction

    …adjustment is needed when SINGULAIR is co-administered with theophylline, prednisone, prednisolone, oral contraceptives, fexofenadine, digoxin, warfarin, gemfibrozil, itraconazole, thyroid hormones, sedative hypnotics, non-steroidal anti-inflammatory agents, benzodiazepines, decongestants, and Cytochrome P450 (CYP) enzyme inducers [see Clinical Pharmacology (12.3) ]. (Montelukast label, Drug interactions)

Check Trifluoperazine against everything you take. Add your full list; every pair is checked at once.

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Not medical advice. Severity reflects the label's wording, not your circumstances. A "major" flag can be routine under supervision and a "minor" one can matter at high doses. Ask a pharmacist.