Haloperidol interactions

Haloperidol (Haldol), an antipsychotic has 285 documented interactions across the FDA labels and fact sheets we index: 122 major, 157 moderate, 5 minor, and 1 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.

Major interactions (122)

  • AlcoholAlcoholMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • AlprazolambenzodiazepineMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • AmantadineanticholinergicMajor

    For conditions other than Parkinson's disease and dementia with Lewy bodies, when possible, avoid concomitant use of HALDOL DECANOATE with dopaminergic drugs [see Warnings and Precautions (5.7) ] . (Haloperidol label, Drug interactions)

  • AmiodaroneantiarrhythmicMajor

    Reserve the combination of amiodarone with other antiarrhythmic therapies that prolong the QTc to patients with life-threatening ventricular arrhythmias who are incompletely responsive to a single agent. (Amiodarone label, Warnings and precautions)

  • Azithromycinmacrolide antibioticMajor

    This risk which can be fatal should be considered in patients with certain cardiovascular disorders including known QT prolongation or history torsades de pointes, those with proarrhythmic conditions, and with other drugs that prolong the QT interval. (Azithromycin label, Warnings and precautions)

  • Baclofenmuscle relaxantMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • BrivaracetamanticonvulsantMajor

    Seizures: HALDOL DECANOATE is generally not recommended in patients receiving antiseizure drugs or who have a history of seizures or EEG abnormalities. (Haloperidol label, Warnings and precautions)

  • BuprenorphineopioidMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • ButorphanolopioidMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • Cabergolinedopamine agonistMajor

    For conditions other than Parkinson's disease and dementia with Lewy bodies, when possible, avoid concomitant use of HALDOL DECANOATE with dopaminergic drugs [see Warnings and Precautions (5.7) ] . (Haloperidol label, Drug interactions)

  • Cannabidiol (prescription)anticonvulsantMajor

    Seizures: HALDOL DECANOATE is generally not recommended in patients receiving antiseizure drugs or who have a history of seizures or EEG abnormalities. (Haloperidol label, Warnings and precautions)

  • CarbamazepineanticonvulsantMajor

    Seizures: HALDOL DECANOATE is generally not recommended in patients receiving antiseizure drugs or who have a history of seizures or EEG abnormalities. (Haloperidol label, Warnings and precautions)

  • Carbidopa and levodopadopaminergic drugMajor

    For conditions other than Parkinson's disease and dementia with Lewy bodies, when possible, avoid concomitant use of HALDOL DECANOATE with dopaminergic drugs [see Warnings and Precautions (5.7) ] . (Haloperidol label, Drug interactions)

  • Carisoprodolmuscle relaxantMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • CenobamateanticonvulsantMajor

    Seizures: HALDOL DECANOATE is generally not recommended in patients receiving antiseizure drugs or who have a history of seizures or EEG abnormalities. (Haloperidol label, Warnings and precautions)

  • 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

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • CiprofloxacinfluoroquinoloneMajor

    Avoid use in patients with known prolongation, those with hypokalemia, and with other drugs that prolong the QT interval. (Ciprofloxacin label, Warnings and precautions)

  • 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

    Seizures: HALDOL DECANOATE is generally not recommended in patients receiving antiseizure drugs or who have a history of seizures or EEG abnormalities. (Haloperidol label, Warnings and precautions)

  • ClonazepambenzodiazepineMajor

    Seizures: HALDOL DECANOATE is generally not recommended in patients receiving antiseizure drugs or who have a history of seizures or EEG abnormalities. (Haloperidol label, Warnings and precautions)

  • Clonidinealpha-adrenergic agonistMajor

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

  • CodeineopioidMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • Cyclobenzaprinemuscle relaxantMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • Dantrolenemuscle relaxantMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • Daridorexantsedative-hypnoticMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • 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

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • Divalproex (valproate)anticonvulsantMajor

    Seizures: HALDOL DECANOATE is generally not recommended in patients receiving antiseizure drugs or who have a history of seizures or EEG abnormalities. (Haloperidol label, Warnings and precautions)

  • DofetilideantiarrhythmicMajor

    Use with Drugs that Prolong QT Interval and Antiarrhythmic Agents The use of dofetilide in conjunction with other drugs that prolong the QT interval has not been studied and is not recommended. (Dofetilide label, Warnings)

  • DronabinolcannabinoidMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • 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)

  • DroxidopasympathomimeticMajor

    Should hypotension occur and a vasopressor be required, epinephrine must not be used since HALDOL DECANOATE may block its vasopressor activity, and paradoxically lower blood pressure. (Haloperidol label, Warnings and precautions)

  • EluxadolineopioidMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • EpinephrinesympathomimeticMajor

    Should hypotension occur and a vasopressor be required, epinephrine must not be used since HALDOL DECANOATE may block its vasopressor activity, and paradoxically lower blood pressure. (Haloperidol label, Warnings and precautions)

  • EslicarbazepineanticonvulsantMajor

    Seizures: HALDOL DECANOATE is generally not recommended in patients receiving antiseizure drugs or who have a history of seizures or EEG abnormalities. (Haloperidol label, Warnings and precautions)

  • Eszopiclonesedative-hypnoticMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • EthosuximideanticonvulsantMajor

    Seizures: HALDOL DECANOATE is generally not recommended in patients receiving antiseizure drugs or who have a history of seizures or EEG abnormalities. (Haloperidol label, Warnings and precautions)

  • FelbamateanticonvulsantMajor

    Seizures: HALDOL DECANOATE is generally not recommended in patients receiving antiseizure drugs or who have a history of seizures or EEG abnormalities. (Haloperidol label, Warnings and precautions)

  • FentanylopioidMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • FingolimodimmunosuppressantMajor

    …6-hour observation, or at additional risk for QT prolongation (e.g., hypokalemia, hypomagnesemia, congenital long-QT syndrome), or on concurrent therapy with QT prolonging drugs with a known risk of torsades de pointes (e.g., citalopram, chlorpromazine, haloperidol, methadone, erythromycin) should be monitored overnight with continuous ECG in a medical facility. (Fingolimod label, Warnings and precautions)

  • Fluconazoleazole antifungalMajor

    Coadministration of other drugs known to prolong the QT interval and which are metabolized via the enzyme CYP3A4 such as erythromycin, pimozide, and quinidine are contraindicated in patients receiving fluconazole. (Fluconazole label, Contraindications)

  • FosfomycinantibioticMajor

    Avoid co-administration of CONTEPO with drugs known to prolong the QT interval. (Fosfomycin label, Drug interactions)

  • GabapentinanticonvulsantMajor

    Seizures: HALDOL DECANOATE is generally not recommended in patients receiving antiseizure drugs or who have a history of seizures or EEG abnormalities. (Haloperidol label, Warnings and precautions)

  • Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • HydromorphoneopioidMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • HydroxychloroquineQT-prolonging drugMajor

    Therefore, PLAQUENIL is not recommended in patients taking other drugs that have the potential to prolong the QT interval. (Hydroxychloroquine label, Warnings and precautions)

  • 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)

  • IloperidoneantipsychoticMajor

    Avoid the use of FANAPT in combination with any other drugs that prolong the QT interval [see Warnings and Precautions (5.3) ] . (Iloperidone label, Drug interactions)

  • Bradycardia may increase the risk of QT prolongation which may lead to severe ventricular arrhythmias, including torsade de pointes, especially in patients with risk factors such as use of QTc prolonging drugs [see Adverse Reactions ( 6.2 )] . (Ivabradine label, Warnings and precautions)

  • KetamineCNS depressantMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol 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)

  • LacosamideanticonvulsantMajor

    Seizures: HALDOL DECANOATE is generally not recommended in patients receiving antiseizure drugs or who have a history of seizures or EEG abnormalities. (Haloperidol label, Warnings and precautions)

  • LamotrigineanticonvulsantMajor

    Seizures: HALDOL DECANOATE is generally not recommended in patients receiving antiseizure drugs or who have a history of seizures or EEG abnormalities. (Haloperidol label, Warnings and precautions)

  • Lemborexantsedative-hypnoticMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • LevetiracetamanticonvulsantMajor

    Seizures: HALDOL DECANOATE is generally not recommended in patients receiving antiseizure drugs or who have a history of seizures or EEG abnormalities. (Haloperidol label, Warnings and precautions)

  • LevocetirizineantihistamineMajor

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

  • LevofloxacinfluoroquinoloneMajor

    Avoid use in patients with known prolongation, those with hypokalemia, and with other drugs that prolong the QT interval ( 5.11 , 8.5 ) (Levofloxacin label, Warnings and precautions)

  • LevorphanolopioidMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • LorazepambenzodiazepineMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • LumateperoneantipsychoticMajor

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

  • MeperidineopioidMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • MethadoneopioidMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • Methocarbamolmuscle relaxantMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • 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

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • Midodrinealpha-adrenergic agonistMajor

    Should hypotension occur and a vasopressor be required, epinephrine must not be used since HALDOL DECANOATE may block its vasopressor activity, and paradoxically lower blood pressure. (Haloperidol label, Warnings and precautions)

  • Mirabegronbeta-adrenergic agonistMajor

    Should hypotension occur and a vasopressor be required, epinephrine must not be used since HALDOL DECANOATE may block its vasopressor activity, and paradoxically lower blood pressure. (Haloperidol label, Warnings and precautions)

  • MirtazapineantidepressantMajor

    Examples diazepam, alprazolam, alcohol Drugs that Prolong QTc Interval Clinical Impact The concomitant use of other drugs which prolong the QTc interval with REMERON/REMERONSolTab, increase the risk of QT prolongation and/or ventricular arrhythmias (e.g., Torsades de Pointes). (Mirtazapine label, Drug interactions)

  • ModafinilCNS stimulantMajor

    Should hypotension occur and a vasopressor be required, epinephrine must not be used since HALDOL DECANOATE may block its vasopressor activity, and paradoxically lower blood pressure. (Haloperidol label, Warnings and precautions)

  • MorphineopioidMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • NalbuphineopioidMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • …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

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • OlopatadineantihistamineMajor

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

  • OxcarbazepineanticonvulsantMajor

    Seizures: HALDOL DECANOATE is generally not recommended in patients receiving antiseizure drugs or who have a history of seizures or EEG abnormalities. (Haloperidol label, Warnings and precautions)

  • OxycodoneopioidMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • OxymorphoneopioidMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • PerampanelanticonvulsantMajor

    Seizures: HALDOL DECANOATE is generally not recommended in patients receiving antiseizure drugs or who have a history of seizures or EEG abnormalities. (Haloperidol label, Warnings and precautions)

  • 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

    Seizures: HALDOL DECANOATE is generally not recommended in patients receiving antiseizure drugs or who have a history of seizures or EEG abnormalities. (Haloperidol label, Warnings and precautions)

  • PhentermineCNS stimulantMajor

    Should hypotension occur and a vasopressor be required, epinephrine must not be used since HALDOL DECANOATE may block its vasopressor activity, and paradoxically lower blood pressure. (Haloperidol label, Warnings and precautions)

  • Phentermine and topiramateCNS stimulantMajor

    Seizures: HALDOL DECANOATE is generally not recommended in patients receiving antiseizure drugs or who have a history of seizures or EEG abnormalities. (Haloperidol label, Warnings and precautions)

  • PhenylephrinedecongestantMajor

    Should hypotension occur and a vasopressor be required, epinephrine must not be used since HALDOL DECANOATE may block its vasopressor activity, and paradoxically lower blood pressure. (Haloperidol label, Warnings and precautions)

  • PhenytoinanticonvulsantMajor

    Seizures: HALDOL DECANOATE is generally not recommended in patients receiving antiseizure drugs or who have a history of seizures or EEG abnormalities. (Haloperidol label, Warnings and precautions)

  • PitolisantQT-prolonging drugMajor

    The use of WAKIX should be avoided in patients with known QT prolongation or in combination with other drugs known to prolong the QT interval [see Drug Interactions ( 7.1 )]. (Pitolisant label, Warnings and precautions)

  • Pramipexoledopamine agonistMajor

    For conditions other than Parkinson's disease and dementia with Lewy bodies, when possible, avoid concomitant use of HALDOL DECANOATE with dopaminergic drugs [see Warnings and Precautions (5.7) ] . (Haloperidol label, Drug interactions)

  • PregabalinanticonvulsantMajor

    Seizures: HALDOL DECANOATE is generally not recommended in patients receiving antiseizure drugs or who have a history of seizures or EEG abnormalities. (Haloperidol label, Warnings and precautions)

  • PrimidoneanticonvulsantMajor

    Seizures: HALDOL DECANOATE is generally not recommended in patients receiving antiseizure drugs or who have a history of seizures or EEG abnormalities. (Haloperidol label, Warnings and precautions)

  • PropafenoneantiarrhythmicMajor

    • Avoid use with other antiarrhythmic agents or drugs that prolong the QT interval. (Propafenone label, Warnings and precautions)

  • PropofolCNS depressantMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • PseudoephedrinedecongestantMajor

    Should hypotension occur and a vasopressor be required, epinephrine must not be used since HALDOL DECANOATE may block its vasopressor activity, and paradoxically lower blood pressure. (Haloperidol label, Warnings and precautions)

  • Ramelteonsedative-hypnoticMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • 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… (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)

  • Ropiniroledopamine agonistMajor

    For conditions other than Parkinson's disease and dementia with Lewy bodies, when possible, avoid concomitant use of HALDOL DECANOATE with dopaminergic drugs [see Warnings and Precautions (5.7) ] . (Haloperidol label, Drug interactions)

  • RufinamideanticonvulsantMajor

    Seizures: HALDOL DECANOATE is generally not recommended in patients receiving antiseizure drugs or who have a history of seizures or EEG abnormalities. (Haloperidol label, Warnings and precautions)

  • SertralineSSRIMajor

    Avoid the concomitant use of drugs known to prolong the QTc interval. (Sertraline label, Drug interactions)

  • Sodium oxybateCNS depressantMajor

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

  • Suvorexantsedative-hypnoticMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • TapentadolopioidMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • Tasimelteonsedative-hypnoticMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • TemazepambenzodiazepineMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • 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)

  • TiagabineanticonvulsantMajor

    Seizures: HALDOL DECANOATE is generally not recommended in patients receiving antiseizure drugs or who have a history of seizures or EEG abnormalities. (Haloperidol label, Warnings and precautions)

  • Tizanidinemuscle relaxantMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • TopiramateanticonvulsantMajor

    Seizures: HALDOL DECANOATE is generally not recommended in patients receiving antiseizure drugs or who have a history of seizures or EEG abnormalities. (Haloperidol label, Warnings and precautions)

  • TramadolopioidMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • TriazolambenzodiazepineMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • 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)

  • 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)

  • Valproic acidanticonvulsantMajor

    Seizures: HALDOL DECANOATE is generally not recommended in patients receiving antiseizure drugs or who have a history of seizures or EEG abnormalities. (Haloperidol label, Warnings and precautions)

  • Vibegronbeta-adrenergic agonistMajor

    Should hypotension occur and a vasopressor be required, epinephrine must not be used since HALDOL DECANOATE may block its vasopressor activity, and paradoxically lower blood pressure. (Haloperidol label, Warnings and precautions)

  • VigabatrinanticonvulsantMajor

    Seizures: HALDOL DECANOATE is generally not recommended in patients receiving antiseizure drugs or who have a history of seizures or EEG abnormalities. (Haloperidol label, Warnings and precautions)

  • Zaleplonsedative-hypnoticMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • ZiprasidoneantipsychoticMajor

    …drugs, ziprasidone is contraindicated: • in patients with a known history of QT prolongation (including congenital long QT syndrome) • in patients with recent acute myocardial infarction • in patients with uncompensated heart failure Pharmacokinetic/pharmacodynamic studies between ziprasidone and other drugs that prolong the QT interval have not been performed. (Ziprasidone label, Contraindications)

  • Zolpidemsedative-hypnoticMajor

    Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol. (Haloperidol label, Drug interactions)

  • ZonisamideanticonvulsantMajor

    Seizures: HALDOL DECANOATE is generally not recommended in patients receiving antiseizure drugs or who have a history of seizures or EEG abnormalities. (Haloperidol label, Warnings and precautions)

Moderate interactions (157)

  • AclidiniumanticholinergicModerate

    Anticholinergic Drugs Clinical Impact The healthcare provider should keep in mind the possible increase in intraocular pressure when anticholinergic drugs are administered concomitantly with HALDOL DECANOATE. (Haloperidol label, Drug interactions)

  • Alfuzosinalpha blockerModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

  • AliskirenantihypertensiveModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • 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)

  • Amiloridepotassium-sparing diureticModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • Amitriptylinetricyclic antidepressantModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

  • Amlodipinedihydropyridine calcium channel blockerModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • Amlodipine and benazeprildihydropyridine calcium channel blockerModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • AprepitantCYP3A4 inhibitorModerate

    CYP3A4 Inducers Clinical Impact CYP3A4 inducers decrease haloperidol exposure (haloperidol is a CYP3A4 substrate) [see Clinical Pharmacology (12.3) ]. (Haloperidol label, Drug interactions)

  • AripiprazoleantipsychoticModerate

    ABILIFY MAINTENA and other antipsychotic drugs should be used cautiously in patients at risk for aspiration pneumonia [see Warnings and Precautions (5.1) ] . (Aripiprazole label, Warnings and precautions)

  • ArmodafinilCNS stimulantModerate

    CYP3A4 Inducers Clinical Impact CYP3A4 inducers decrease haloperidol exposure (haloperidol is a CYP3A4 substrate) [see Clinical Pharmacology (12.3) ]. (Haloperidol label, Drug interactions)

  • AsenapineantipsychoticModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

  • Atenololbeta blockerModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • Azilsartanangiotensin II receptor blocker (ARB)Moderate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • BenazeprilACE inhibitorModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • BenztropineanticholinergicModerate

    Anticholinergic Drugs Clinical Impact The healthcare provider should keep in mind the possible increase in intraocular pressure when anticholinergic drugs are administered concomitantly with HALDOL DECANOATE. (Haloperidol label, Drug interactions)

  • Bictegravir, emtricitabine, and tenofovir alafenamideantiretroviralModerate

    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)

  • Bisoprololbeta blockerModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • Bisoprolol and hydrochlorothiazidebeta blockerModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • BosentanCYP3A4 inducerModerate

    CYP3A4 Inducers Clinical Impact CYP3A4 inducers decrease haloperidol exposure (haloperidol is a CYP3A4 substrate) [see Clinical Pharmacology (12.3) ]. (Haloperidol label, Drug interactions)

  • Brimonidinealpha-adrenergic agonistModerate

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

  • BupropionantidepressantModerate

    CYP3A4 and/or CYP2D6 Inhibitors Clinical Impact CYP3A4 and/or CYP2D6 inhibitors increase haloperidol exposure (haloperidol is a CYP3A4 and CYP2D6 substrate) [see Clinical Pharmacology (12.3) ]. (Haloperidol label, Drug interactions)

  • Buspironeserotonergic drugModerate

    Haloperidol: In a study in normal volunteers, concomitant administration of buspirone and haloperidol resulted in increased serum haloperidol concentrations. (Buspirone label, Drug interactions)

  • Candesartanangiotensin II receptor blocker (ARB)Moderate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • CaptoprilACE inhibitorModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • CariprazineantipsychoticModerate

    VRAYLAR and other antipsychotic drugs should be used cautiously in patients at risk for aspiration. (Cariprazine label, Warnings and precautions)

  • Carvedilolbeta blockerModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • ChloroquineantimalarialModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

  • ChlorpheniramineantihistamineModerate

    Anticholinergic Drugs Clinical Impact The healthcare provider should keep in mind the possible increase in intraocular pressure when anticholinergic drugs are administered concomitantly with HALDOL DECANOATE. (Haloperidol label, Drug interactions)

  • ChlorpromazineantipsychoticModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

  • Chlorthalidonethiazide diureticModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • CimetidineH2 blockerModerate

    CYP3A4 and/or CYP2D6 Inhibitors Clinical Impact CYP3A4 and/or CYP2D6 inhibitors increase haloperidol exposure (haloperidol is a CYP3A4 and CYP2D6 substrate) [see Clinical Pharmacology (12.3) ]. (Haloperidol label, Drug interactions)

  • CitalopramSSRIModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

  • ClozapineantipsychoticModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

  • CyclopentolateanticholinergicModerate

    Anticholinergic Drugs Clinical Impact The healthcare provider should keep in mind the possible increase in intraocular pressure when anticholinergic drugs are administered concomitantly with HALDOL DECANOATE. (Haloperidol label, Drug interactions)

  • DarifenacinanticholinergicModerate

    CYP3A4 and/or CYP2D6 Inhibitors Clinical Impact CYP3A4 and/or CYP2D6 inhibitors increase haloperidol exposure (haloperidol is a CYP3A4 and CYP2D6 substrate) [see Clinical Pharmacology (12.3) ]. (Haloperidol label, Drug interactions)

  • Deferasiroxiron supplementModerate

    CYP3A4 Inducers Clinical Impact CYP3A4 inducers decrease haloperidol exposure (haloperidol is a CYP3A4 substrate) [see Clinical Pharmacology (12.3) ]. (Haloperidol label, Drug interactions)

  • DexamethasonecorticosteroidModerate

    CYP3A4 Inducers Clinical Impact CYP3A4 inducers decrease haloperidol exposure (haloperidol is a CYP3A4 substrate) [see Clinical Pharmacology (12.3) ]. (Haloperidol label, Drug interactions)

  • DicyclomineanticholinergicModerate

    Anticholinergic Drugs Clinical Impact The healthcare provider should keep in mind the possible increase in intraocular pressure when anticholinergic drugs are administered concomitantly with HALDOL DECANOATE. (Haloperidol label, Drug interactions)

  • Diltiazemcalcium channel blockerModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • DimenhydrinateantihistamineModerate

    Anticholinergic Drugs Clinical Impact The healthcare provider should keep in mind the possible increase in intraocular pressure when anticholinergic drugs are administered concomitantly with HALDOL DECANOATE. (Haloperidol label, Drug interactions)

  • DiphenhydramineantihistamineModerate

    CYP3A4 and/or CYP2D6 Inhibitors Clinical Impact CYP3A4 and/or CYP2D6 inhibitors increase haloperidol exposure (haloperidol is a CYP3A4 and CYP2D6 substrate) [see Clinical Pharmacology (12.3) ]. (Haloperidol label, Drug interactions)

  • Doxazosinalpha blockerModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • Doxepintricyclic antidepressantModerate

    Anticholinergic Drugs Clinical Impact The healthcare provider should keep in mind the possible increase in intraocular pressure when anticholinergic drugs are administered concomitantly with HALDOL DECANOATE. (Haloperidol label, Drug interactions)

  • DoxylamineantihistamineModerate

    Anticholinergic Drugs Clinical Impact The healthcare provider should keep in mind the possible increase in intraocular pressure when anticholinergic drugs are administered concomitantly with HALDOL DECANOATE. (Haloperidol label, Drug interactions)

  • DuloxetineSNRIModerate

    CYP3A4 and/or CYP2D6 Inhibitors Clinical Impact CYP3A4 and/or CYP2D6 inhibitors increase haloperidol exposure (haloperidol is a CYP3A4 and CYP2D6 substrate) [see Clinical Pharmacology (12.3) ]. (Haloperidol label, Drug interactions)

  • EnalaprilACE inhibitorModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • Eplerenonealdosterone antagonistModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • Erythromycinmacrolide antibioticModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

  • EscitalopramSSRIModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

  • Ethacrynic acidloop diureticModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • EverolimusimmunosuppressantModerate

    CYP3A4 and/or CYP2D6 Inhibitors Clinical Impact CYP3A4 and/or CYP2D6 inhibitors increase haloperidol exposure (haloperidol is a CYP3A4 and CYP2D6 substrate) [see Clinical Pharmacology (12.3) ]. (Haloperidol label, Drug interactions)

  • Felodipinedihydropyridine calcium channel blockerModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • FesoterodineanticholinergicModerate

    Anticholinergic Drugs Clinical Impact The healthcare provider should keep in mind the possible increase in intraocular pressure when anticholinergic drugs are administered concomitantly with HALDOL DECANOATE. (Haloperidol label, Drug interactions)

  • FlecainideantiarrhythmicModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

  • FlibanserinCNS depressantModerate

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

  • FluoxetineSSRIModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

  • FluvoxamineSSRIModerate

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

  • Formoterolbeta-adrenergic agonistModerate

    …Antidepressants, QTc Prolonging Drugs Formoterol, as with other beta 2 -agonists, should be administered with extreme caution to patients being treated with monoamine oxidase inhibitors, tricyclic antidepressants, or drugs known to prolong the QTc interval because the effect of adrenergic agonists on the cardiovascular system may be potentiated by these agents. (Formoterol label, Drug interactions)

  • FosinoprilACE inhibitorModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • Furosemideloop diureticModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and 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

    Anticholinergic Drugs Clinical Impact The healthcare provider should keep in mind the possible increase in intraocular pressure when anticholinergic drugs are administered concomitantly with HALDOL DECANOATE. (Haloperidol label, Drug interactions)

  • GranisetronQT-prolonging drugModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

  • GriseofulvinantifungalModerate

    CYP3A4 Inducers Clinical Impact CYP3A4 inducers decrease haloperidol exposure (haloperidol is a CYP3A4 substrate) [see Clinical Pharmacology (12.3) ]. (Haloperidol label, Drug interactions)

  • Guanfacinealpha-adrenergic agonistModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • HydralazinevasodilatorModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • Hydrochlorothiazidethiazide diureticModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • HyoscyamineanticholinergicModerate

    Anticholinergic Drugs Clinical Impact The healthcare provider should keep in mind the possible increase in intraocular pressure when anticholinergic drugs are administered concomitantly with HALDOL DECANOATE. (Haloperidol label, Drug interactions)

  • ImatinibCYP3A4 inhibitorModerate

    CYP3A4 and/or CYP2D6 Inhibitors Clinical Impact CYP3A4 and/or CYP2D6 inhibitors increase haloperidol exposure (haloperidol is a CYP3A4 and CYP2D6 substrate) [see Clinical Pharmacology (12.3) ]. (Haloperidol label, Drug interactions)

  • Indapamidethiazide diureticModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and 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

    Anticholinergic Drugs Clinical Impact The healthcare provider should keep in mind the possible increase in intraocular pressure when anticholinergic drugs are administered concomitantly with HALDOL DECANOATE. (Haloperidol label, Drug interactions)

  • Irbesartanangiotensin II receptor blocker (ARB)Moderate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • Isosorbide dinitrate and hydralazinenitrateModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • Isradipinedihydropyridine calcium channel blockerModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • 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)

  • Labetalolbeta blockerModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • LisinoprilACE inhibitorModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • Lisinopril and hydrochlorothiazideACE inhibitorModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • Lithiumserotonergic drugModerate

    Risk of Encephalopathic Syndrome with Concomitant Use of Lithium: Monitor closely for early signs of neurological toxicity and discontinue HALDOL DECANOATE if such signs appear ( 5.12 ). (Haloperidol label, Warnings and precautions)

  • Lofexidinealpha-adrenergic agonistModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • LoperamideQT-prolonging drugModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

  • Losartanangiotensin II receptor blocker (ARB)Moderate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • Losartan and hydrochlorothiazideangiotensin II receptor blocker (ARB)Moderate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • LurasidoneantipsychoticModerate

    LATUDA and other antipsychotic drugs should be used cautiously in patients at risk for aspiration pneumonia. (Lurasidone label, Warnings and precautions)

  • MeclizineantihistamineModerate

    Anticholinergic Drugs Clinical Impact The healthcare provider should keep in mind the possible increase in intraocular pressure when anticholinergic drugs are administered concomitantly with HALDOL DECANOATE. (Haloperidol label, Drug interactions)

  • MethyldopaantihypertensiveModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • Metolazonethiazide diureticModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • Metoprololbeta blockerModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • MetronidazoleantibioticModerate

    Drugs that Prolong the QT Interval QT prolongation has been reported, particularly when metronidazole was administered with drugs with the potential for prolonging the QT interval. (Metronidazole label, Drug interactions)

  • MinoxidilvasodilatorModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • MoexiprilACE inhibitorModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • MoxifloxacinfluoroquinoloneModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

  • Nadololbeta blockerModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol 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

    CYP3A4 and/or CYP2D6 Inhibitors Clinical Impact CYP3A4 and/or CYP2D6 inhibitors increase haloperidol exposure (haloperidol is a CYP3A4 and CYP2D6 substrate) [see Clinical Pharmacology (12.3) ]. (Haloperidol label, Drug interactions)

  • Nebivololbeta blockerModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • Nicardipinedihydropyridine calcium channel blockerModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • Nifedipinedihydropyridine calcium channel blockerModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • Nisoldipinedihydropyridine calcium channel blockerModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • Nortriptylinetricyclic antidepressantModerate

    Anticholinergic Drugs Clinical Impact The healthcare provider should keep in mind the possible increase in intraocular pressure when anticholinergic drugs are administered concomitantly with HALDOL DECANOATE. (Haloperidol label, Drug interactions)

  • OfloxacinfluoroquinoloneModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

  • OlanzapineantipsychoticModerate

    Anticholinergic Drugs Clinical Impact The healthcare provider should keep in mind the possible increase in intraocular pressure when anticholinergic drugs are administered concomitantly with HALDOL DECANOATE. (Haloperidol label, Drug interactions)

  • Olmesartanangiotensin II receptor blocker (ARB)Moderate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • OndansetronQT-prolonging drugModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

  • OxybutyninanticholinergicModerate

    Anticholinergic Drugs Clinical Impact The healthcare provider should keep in mind the possible increase in intraocular pressure when anticholinergic drugs are administered concomitantly with HALDOL DECANOATE. (Haloperidol label, Drug interactions)

  • PaliperidoneantipsychoticModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

  • ParoxetineSSRIModerate

    CYP3A4 and/or CYP2D6 Inhibitors Clinical Impact CYP3A4 and/or CYP2D6 inhibitors increase haloperidol exposure (haloperidol is a CYP3A4 and CYP2D6 substrate) [see Clinical Pharmacology (12.3) ]. (Haloperidol label, Drug interactions)

  • PerindoprilACE inhibitorModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • PimavanserinantipsychoticModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

  • Pindololbeta blockerModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • Posaconazoleazole antifungalModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

  • Prazosinalpha blockerModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • ProchlorperazineantipsychoticModerate

    Anticholinergic Drugs Clinical Impact The healthcare provider should keep in mind the possible increase in intraocular pressure when anticholinergic drugs are administered concomitantly with HALDOL DECANOATE. (Haloperidol label, Drug interactions)

  • PromethazineantihistamineModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

  • Propranololbeta blockerModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • QuetiapineantipsychoticModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

  • QuinaprilACE inhibitorModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • RamiprilACE inhibitorModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • RanolazineQT-prolonging drugModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol 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)

  • RisperidoneantipsychoticModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

  • Sacubitril and valsartanangiotensin II receptor blocker (ARB)Moderate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • ScopolamineanticholinergicModerate

    Anticholinergic Drugs Clinical Impact The healthcare provider should keep in mind the possible increase in intraocular pressure when anticholinergic drugs are administered concomitantly with HALDOL DECANOATE. (Haloperidol label, Drug interactions)

  • 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)

  • SolifenacinanticholinergicModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

  • Sotalolbeta blockerModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

  • Spironolactonealdosterone antagonistModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • Spironolactone and hydrochlorothiazidealdosterone antagonistModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • TacrolimusimmunosuppressantModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

  • Tamoxifenselective estrogen receptor modulatorModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

  • Telmisartanangiotensin II receptor blocker (ARB)Moderate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • Terazosinalpha blockerModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • TerbinafineantifungalModerate

    CYP3A4 and/or CYP2D6 Inhibitors Clinical Impact CYP3A4 and/or CYP2D6 inhibitors increase haloperidol exposure (haloperidol is a CYP3A4 and CYP2D6 substrate) [see Clinical Pharmacology (12.3) ]. (Haloperidol label, Drug interactions)

  • TheophyllinemethylxanthineModerate

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

  • TiotropiumanticholinergicModerate

    Anticholinergic Drugs Clinical Impact The healthcare provider should keep in mind the possible increase in intraocular pressure when anticholinergic drugs are administered concomitantly with HALDOL DECANOATE. (Haloperidol label, Drug interactions)

  • TolterodineanticholinergicModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

  • Torsemideloop diureticModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • TrandolaprilACE inhibitorModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and 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

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

  • Triamterenepotassium-sparing diureticModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • Triamterene and hydrochlorothiazidepotassium-sparing diureticModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • TrospiumanticholinergicModerate

    Anticholinergic Drugs Clinical Impact The healthcare provider should keep in mind the possible increase in intraocular pressure when anticholinergic drugs are administered concomitantly with HALDOL DECANOATE. (Haloperidol label, Drug interactions)

  • Umeclidinium and vilanterolanticholinergicModerate

    Anticholinergic Drugs Clinical Impact The healthcare provider should keep in mind the possible increase in intraocular pressure when anticholinergic drugs are administered concomitantly with HALDOL DECANOATE. (Haloperidol label, Drug interactions)

  • Valsartanangiotensin II receptor blocker (ARB)Moderate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • Valsartan and hydrochlorothiazideangiotensin II receptor blocker (ARB)Moderate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • VardenafilPDE5 inhibitorModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

  • VenlafaxineSNRIModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

  • Verapamilcalcium channel blockerModerate

    Orthostatic vital signs should be monitored in patients who are at risk for hypotension (e.g., geriatric patients, patients with dehydration, hypovolemia, and concomitantly treated with antihypertensive medications), patients with known cardiovascular disease (history of myocardial infarction, ischemic heart disease, heart failure, or conduction abnormalities), and… (Haloperidol label, Warnings and precautions)

  • Voriconazoleazole antifungalModerate

    Concomitant use of HALDOL DECANOATE with other products that prolong the QTc interval may result in a greater increase in the QTc interval, and adverse reactions associated with QTc interval prolongation, including torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ]. (Haloperidol label, Drug interactions)

Minor mentions (5)

  • Atomoxetinenorepinephrine reuptake inhibitorMinor

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

  • BrexpiprazoleantipsychoticMinor

    Seizures Like other antipsychotic drugs, REXULTI may cause seizures. (Brexpiprazole label, Warnings and precautions)

  • Epoetin alfaMinor

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

  • Insulin regular (human)insulinMinor

    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)

  • 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)

No significant interaction reported (1)

  • 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)

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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.