Amantadine interactions

Amantadine (Gocovri, Osmolex, Symmetrel), an anticholinergic has 106 documented interactions across the FDA labels and fact sheets we index: 12 major, 84 moderate, 9 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 (12)

  • AclidiniumanticholinergicMajor

    Avoid administrations of TUDORZA PRESSAIR with other anticholinergic-containing drugs. (Aclidinium label, Drug interactions)

  • AlcoholAlcoholMajor

    Concomitant use of alcohol when using GOCOVRI is not recommended [see Drug Interactions ( 7.4 )]. (Amantadine label, Warnings and precautions)

  • ClozapineantipsychoticMajor

    When possible, avoid concomitant use, with other anticholinergic medications because the risk for anticholinergic toxicity or severe gastrointestinal adverse reactions is increased [see Warnings and Precautions ( 5.7 ), Drug Interactions ( 7.1 )]. (Clozapine label, Warnings and precautions)

  • GlucagonMajor

    Intervention Concomitant use of anticholinergic drugs with GVOKE VialDx is not recommended. (Glucagon label, Drug interactions)

  • GlycopyrrolateanticholinergicMajor

    • Other Conditions Exacerbated by Anticholinergic Adverse Reactions : Use is not recommended in patients with autonomic neuropathy, hyperthyroidism, cardiac disease, hiatal hernia, etc. (Glycopyrrolate label, Warnings and precautions)

  • HaloperidolantipsychoticMajor

    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)

  • IpratropiumanticholinergicMajor

    Avoid administration of ATROVENT HFA with other anticholinergic-containing drugs ( 7.1 ) (Ipratropium label, Drug interactions)

  • Metoclopramidedopamine antagonistMajor

    Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, malignant hyperthermia, drug fever, serotonin syndrome, and primary central nervous system pathology. (Metoclopramide label, Warnings and precautions)

  • Rivastigminecholinesterase inhibitorMajor

    Concomitant use with metoclopramide, beta-blockers, or cholinomimetic and anticholinergic drugs is not recommended ( 7.1 , 7.2 , 7.3 ) (Rivastigmine label, Drug interactions)

  • TiotropiumanticholinergicMajor

    Avoid administration of SPIRIVA RESPIMAT with other anticholinergic-containing drugs. (Tiotropium label, Drug interactions)

  • TranylcypromineMAO inhibitorMajor

    …sympathomimetic herbal medicines or dietary supplements antihistamines (allergy medicines) triptans buspirone carbamazepine dextromethorphan dopamine hydroxytryptophan and tryptophan levodopa and methyldopa meperidine rasagline resperine s-adenosyl-L-methionine (SAM-e) tapentadol tetrabenazin Ask your healthcare provider or pharmacist if you are not sure if you… (Tranylcypromine label, Boxed warning)

  • Umeclidinium and vilanterolanticholinergicMajor

    Avoid administration of Umeclidinium and Vilanterol ELLIPTA with other anticholinergic-containing drugs. (Umeclidinium and vilanterol label, Drug interactions)

Moderate interactions (84)

  • Amitriptylinetricyclic antidepressantModerate

    Other Anticholinergic Drugs: Doses should be reduced if atropine-like effects occur ( 7.1 ) (Amantadine label, Drug interactions)

  • AripiprazoleantipsychoticModerate

    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… (Amantadine label, Warnings and precautions)

  • AsenapineantipsychoticModerate

    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… (Amantadine label, Warnings and precautions)

  • BenztropineanticholinergicModerate

    Other Anticholinergic Drugs: Doses should be reduced if atropine-like effects occur ( 7.1 ) (Amantadine label, Drug interactions)

  • BrexpiprazoleantipsychoticModerate

    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… (Amantadine label, Warnings and precautions)

  • BuprenorphineopioidModerate

    Anticholinergic Drugs Clinical Impact: The concomitant use of anticholinergic drugs may increase the risk of urinary retention and/or severe constipation, which may lead to paralytic ileus. (Buprenorphine label, Drug interactions)

  • Anticholinergic Drugs Clinical Impact: The concomitant use of anticholinergic drugs may increase the risk of urinary retention and/or severe constipation, which may lead to paralytic ileus. (Buprenorphine and naloxone label, Drug interactions)

  • BupropionantidepressantModerate

    CNS toxicity has been reported when bupropion was coadministered with levodopa or amantadine. (Bupropion label, Drug interactions)

  • Cabergolinedopamine agonistModerate

    …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 dopaminergic tone. (Amantadine label, Warnings and precautions)

  • CarbamazepineanticonvulsantModerate

    Increased Intraocular Pressure Carbamazepine has mild anticholinergic activity. (Carbamazepine label, Warnings and precautions)

  • CariprazineantipsychoticModerate

    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… (Amantadine label, Warnings and precautions)

  • ChlorpheniramineantihistamineModerate

    Other Anticholinergic Drugs: Doses should be reduced if atropine-like effects occur ( 7.1 ) (Amantadine label, Drug interactions)

  • ChlorpromazineantipsychoticModerate

    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… (Amantadine label, Warnings and precautions)

  • CodeineopioidModerate

    Anticholinergic Drugs Clinical Impact: The concomitant use of anticholinergic drugs may increase risk of urinary retention and/or severe constipation, which may lead to paralytic ileus. (Codeine label, Drug interactions)

  • Cyclobenzaprinemuscle relaxantModerate

    Other Anticholinergic Drugs: Doses should be reduced if atropine-like effects occur ( 7.1 ) (Amantadine label, Drug interactions)

  • CyclopentolateanticholinergicModerate

    Other Anticholinergic Drugs: Doses should be reduced if atropine-like effects occur ( 7.1 ) (Amantadine label, Drug interactions)

  • DarifenacinanticholinergicModerate

    Other Anticholinergic Drugs: Doses should be reduced if atropine-like effects occur ( 7.1 ) (Amantadine label, Drug interactions)

  • DeutetrabenazineVMAT2 inhibitorModerate

    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)

  • Dexmedetomidinealpha-adrenergic agonistModerate

    The intravenous administration of anticholinergic agents (e.g., glycopyrrolate, atropine) should be considered to modify vagal tone. (Dexmedetomidine label, Warnings and precautions)

  • DicyclomineanticholinergicModerate

    Other Anticholinergic Drugs: Doses should be reduced if atropine-like effects occur ( 7.1 ) (Amantadine label, Drug interactions)

  • DimenhydrinateantihistamineModerate

    Other Anticholinergic Drugs: Doses should be reduced if atropine-like effects occur ( 7.1 ) (Amantadine label, Drug interactions)

  • DiphenhydramineantihistamineModerate

    Other Anticholinergic Drugs: Doses should be reduced if atropine-like effects occur ( 7.1 ) (Amantadine label, Drug interactions)

  • Doxepintricyclic antidepressantModerate

    Other Anticholinergic Drugs: Doses should be reduced if atropine-like effects occur ( 7.1 ) (Amantadine label, Drug interactions)

  • DoxylamineantihistamineModerate

    Other Anticholinergic Drugs: Doses should be reduced if atropine-like effects occur ( 7.1 ) (Amantadine label, Drug interactions)

  • DronabinolcannabinoidModerate

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

  • DroxidopasympathomimeticModerate

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

  • EluxadolineopioidModerate

    Examples: alosetron, anticholinergics, opioids Table 3: Established and Other Potentially Clinically Relevant Interactions Affecting Drugs Co-Administered with VIBERZI OATP1B1 and BCRP Substrate Clinical Impact: VIBERZI may increase the exposure of co-administered OATP1B1 and BCRP substrates. (Eluxadoline label, Drug interactions)

  • FentanylopioidModerate

    Anticholinergic Drugs Clinical Impact: The concomitant use of anticholinergic drugs may increase risk of urinary retention and/or severe constipation, which may lead to paralytic ileus. (Fentanyl label, Drug interactions)

  • FesoterodineanticholinergicModerate

    Other Anticholinergic Drugs: Doses should be reduced if atropine-like effects occur ( 7.1 ) (Amantadine label, Drug interactions)

  • Anticholinergic Drugs The concomitant use of anticholinergic drugs may increase risk of urinary retention and/or severe constipation, which may lead to paralytic ileus. (Hydrocodone and acetaminophen label, Drug interactions)

  • HydromorphoneopioidModerate

    Anticholinergic Drugs Clinical Impact: The concomitant use of anticholinergic drugs may increase risk of urinary retention and/or severe constipation, which may lead to paralytic ileus. (Hydromorphone label, Drug interactions)

  • HydroxyzineantihistamineModerate

    Other Anticholinergic Drugs: Doses should be reduced if atropine-like effects occur ( 7.1 ) (Amantadine label, Drug interactions)

  • HyoscyamineanticholinergicModerate

    Other Anticholinergic Drugs: Doses should be reduced if atropine-like effects occur ( 7.1 ) (Amantadine label, Drug interactions)

  • IloperidoneantipsychoticModerate

    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… (Amantadine label, Warnings and precautions)

  • LevorphanolopioidModerate

    Anticholinergic Drugs The concomitant use of anticholinergic drugs may increase risk of urinary retention and/or severe constipation, which may lead to paralytic ileus. (Levorphanol label, Drug interactions)

  • LinezolidantibioticModerate

    …hypertension, pheochromocytoma, thyrotoxicosis and/or patients taking any of the following types of medications: directly and indirectly acting sympathomimetic agents (e.g., pseudoephedrine), vasopressive agents (e.g., epinephrine, norepinephrine), dopaminergic agents (e.g., dopamine, dobutamine) [ see Drug Interactions (7) and Clinical Pharmacology (12.3) ]. (Linezolid label, Warnings and precautions)

  • LumateperoneantipsychoticModerate

    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… (Amantadine label, Warnings and precautions)

  • LurasidoneantipsychoticModerate

    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… (Amantadine label, Warnings and precautions)

  • MeclizineantihistamineModerate

    Other Anticholinergic Drugs: Doses should be reduced if atropine-like effects occur ( 7.1 ) (Amantadine label, Drug interactions)

  • MemantineModerate

    Use with Other N-methyl-D-aspartate (NMDA) Antagonists The combined use of memantine hydrochloride with other NMDA antagonists (amantadine, ketamine, and dextromethorphan) has not been systematically evaluated and such use should be approached with caution. (Memantine label, Drug interactions)

  • MeperidineopioidModerate

    Anticholinergic Drugs Clinical Impact: The concomitant use of anticholinergic drugs may increase risk of urinary retention and/or severe constipation, which may lead to paralytic ileus. (Meperidine label, Drug interactions)

  • MethadoneopioidModerate

    Anticholinergic Drugs Clinical Impact: The concomitant use of anticholinergic drugs may increase risk of urinary retention and/or severe constipation, which may lead to paralytic ileus. (Methadone label, Drug interactions)

  • Mirabegronbeta-adrenergic agonistModerate

    • Urinary Retention in Patients With Bladder Outlet Obstruction and in Patients Taking Muscarinic Antagonist Drugs for Overactive Bladder : Administer with caution in these patients because of risk of urinary retention. (Mirabegron label, Warnings and precautions)

  • MorphineopioidModerate

    Anticholinergic Drugs Clinical Impact: The concomitant use of anticholinergic drugs may increase risk of urinary retention and/or severe constipation, which may lead to paralytic ileus. (Morphine label, Drug interactions)

  • NalbuphineopioidModerate

    Anticholinergic Drugs The concomitant use of anticholinergic drugs may increase risk of urinary retention and/or severe constipation, which may lead to paralytic ileus. (Nalbuphine label, Drug interactions)

  • Naltrexone and bupropionopioid antagonistModerate

    CNS toxicity has been reported when bupropion was coadministered with levodopa or amantadine. (Naltrexone and bupropion label, Drug interactions)

  • Nifedipinedihydropyridine calcium channel blockerModerate

    …diverticulosis, and inflammatory bowel disease), hypomotility disorders (e.g., constipation, gastroesophageal reflux disease, ileus, obesity, hypothyroidism, and diabetes) and concomitant medications (e.g., H 2 -histamine blockers, opiates, nonsteroidal anti-inflammatory drugs, laxatives, anticholinergic agents, levothyroxine, and neuromuscular blocking agents). (Nifedipine label, Warnings)

  • Nortriptylinetricyclic antidepressantModerate

    Other Anticholinergic Drugs: Doses should be reduced if atropine-like effects occur ( 7.1 ) (Amantadine label, Drug interactions)

  • OlanzapineantipsychoticModerate

    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… (Amantadine label, Warnings and precautions)

  • OliceridineopioidModerate

    Anticholinergic Drugs Clinical Impact: The concomitant use of anticholinergic drugs may increase risk of urinary retention and/or severe constipation, which may lead to paralytic ileus. (Oliceridine label, Drug interactions)

  • OnabotulinumtoxinAneuromuscular blockerModerate

    Anticholinergic Drugs Use of anticholinergic drugs after administration of BOTOX may potentiate systemic anticholinergic effects. (OnabotulinumtoxinA label, Drug interactions)

  • OxybutyninanticholinergicModerate

    Other Anticholinergic Drugs: Doses should be reduced if atropine-like effects occur ( 7.1 ) (Amantadine label, Drug interactions)

  • OxycodoneopioidModerate

    Anticholinergic Drugs Clinical Impact: The concomitant use of anticholinergic drugs may increase risk of urinary retention and/or severe constipation, which may lead to paralytic ileus. (Oxycodone label, Drug interactions)

  • Anticholinergic Drugs Clinical Impact: The concomitant use of anticholinergic drugs may result in increased risk of urinary retention and/or severe constipation, which may lead to paralytic ileus. (Oxycodone and acetaminophen label, Drug interactions)

  • OxymorphoneopioidModerate

    Examples: cyclobenzaprine, metaxalone Anticholinergic Drugs Clinical Impact: The concomitant use of anticholinergic drugs may increase risk of urinary retention and/or severe constipation, which may lead to paralytic ileus. (Oxymorphone label, Drug interactions)

  • PaliperidoneantipsychoticModerate

    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… (Amantadine label, Warnings and precautions)

  • ParoxetineSSRIModerate

    Other Anticholinergic Drugs: Doses should be reduced if atropine-like effects occur ( 7.1 ) (Amantadine label, Drug interactions)

  • Pentazocine and naloxoneopioidModerate

    Monitor patients for signs of diminished diuresis and/or effects on blood pressure and increase the dosage of the diuretic as needed Anticholinergic Drugs The concomitant use of anticholinergic drugs may increase risk of urinary retention and/or severe constipation, which may lead to paralytic ileus. (Pentazocine and naloxone label, Drug interactions)

  • Pilocarpinecholinergic agonistModerate

    These effects should be considered when anticholinergic properties may be contributing to the therapeutic effect of concomitant medication (e.g., atropine, inhaled ipratropium). (Pilocarpine label, Drug interactions)

  • PimavanserinantipsychoticModerate

    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… (Amantadine label, Warnings and precautions)

  • Pramipexoledopamine agonistModerate

    …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 dopaminergic tone. (Amantadine label, Warnings and precautions)

  • ProchlorperazineantipsychoticModerate

    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… (Amantadine label, Warnings and precautions)

  • PromethazineantihistamineModerate

    Other Anticholinergic Drugs: Doses should be reduced if atropine-like effects occur ( 7.1 ) (Amantadine label, Drug interactions)

  • PropofolCNS depressantModerate

    The intravenous administration of anticholinergic agents (e.g., atropine or glycopyrrolate) should be considered to modify potential increases in vagal tone due to concomitant agents (e.g., succinylcholine) or surgical stimuli. (Propofol label, Warnings and precautions)

  • Pyridostigminecholinesterase inhibitorModerate

    Use with caution in persons with increased risk of anticholinergic reactions, such as persons with bronchial asthma, chronic obstructive pulmonary disease, bradycardia, cardiac arrhythmias, beta blocker treatment (increased risk of anticholinergic reactions). (Pyridostigmine label, Warnings and precautions)

  • QuetiapineantipsychoticModerate

    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… (Amantadine label, Warnings and precautions)

  • RasagilineMAO inhibitorModerate

    Decreasing the levodopa dose may lessen or eliminate this side effect ( 5.7 ) (Rasagiline label, Warnings and precautions)

  • RisperidoneantipsychoticModerate

    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… (Amantadine label, Warnings and precautions)

  • Ropiniroledopamine agonistModerate

    …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 dopaminergic tone. (Amantadine label, Warnings and precautions)

  • ScopolamineanticholinergicModerate

    Other Anticholinergic Drugs: Doses should be reduced if atropine-like effects occur ( 7.1 ) (Amantadine label, Drug interactions)

  • SelegilineMAO inhibitorModerate

    Dyskinesia ZELAPAR may potentiate dopaminergic side effects of levodopa and may cause dyskinesia or exacerbate preexisting dyskinesia. (Selegiline label, Warnings and precautions)

  • SolifenacinanticholinergicModerate

    Other Anticholinergic Drugs: Doses should be reduced if atropine-like effects occur ( 7.1 ) (Amantadine label, Drug interactions)

  • SolriamfetolCNS stimulantModerate

    Drugs that Increase Blood Pressure and/or Heart Rate and Dopaminergic Drugs : Use caution when co-administering with SUNOSI. (Solriamfetol label, Drug interactions)

  • TapentadolopioidModerate

    Anticholinergic Drugs Clinical Impact: The concomitant use of anticholinergic drugs may increase risk of urinary retention and/or severe constipation, which may lead to paralytic ileus. (Tapentadol label, Drug interactions)

  • TetrabenazineVMAT2 inhibitorModerate

    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)

  • TolterodineanticholinergicModerate

    Other Anticholinergic Drugs: Doses should be reduced if atropine-like effects occur ( 7.1 ) (Amantadine label, Drug interactions)

  • TopiramateanticonvulsantModerate

    Caution should be used when TROKENDI XR is given with other drugs that predispose patients to heat-related disorders; these drugs include, but are not limited to, other carbonic anhydrase inhibitors and drugs with anticholinergic activity . (Topiramate label, Warnings and precautions)

  • TramadolopioidModerate

    Anticholinergic Drugs Clinical Impact: The concomitant use of anticholinergic drugs may increase risk of urinary retention and/or severe constipation, which may lead to paralytic ileus. (Tramadol label, Drug interactions)

  • TrihexyphenidylanticholinergicModerate

    Other Anticholinergic Drugs: Doses should be reduced if atropine-like effects occur ( 7.1 ) (Amantadine label, Drug interactions)

  • TrospiumanticholinergicModerate

    Other Anticholinergic Drugs: Doses should be reduced if atropine-like effects occur ( 7.1 ) (Amantadine label, Drug interactions)

  • ValbenazineVMAT2 inhibitorModerate

    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)

  • Vibegronbeta-adrenergic agonistModerate

    Urinary Retention : Monitor for urinary retention, especially in patients with bladder outlet obstruction and also in patients taking muscarinic antagonist medications for OAB, in whom the risk of urinary retention may be greater. (Vibegron label, Warnings and precautions)

  • ZiprasidoneantipsychoticModerate

    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… (Amantadine label, Warnings and precautions)

  • ZonisamideanticonvulsantModerate

    Caution should be used when ZONISADE is prescribed with other drugs that predispose patients to heat-related disorders; these drugs include, but are not limited to, carbonic anhydrase inhibitors and drugs with anticholinergic activity. (Zonisamide label, Warnings and precautions)

Minor mentions (9)

  • Acetazolamidecarbonic anhydrase inhibitorMinor

    Urine pH is altered by diet, drugs (e.g., carbonic anhydrase inhibitors, sodium bicarbonate), and clinical state of the patient (e.g., renal tubular acidosis or severe infections of the urinary tract). (Amantadine label, Drug interactions)

  • Cevimelinecholinergic agonistMinor

    Cevimeline might interfere with desirable antimuscarinic effects of drugs used concomitantly. (Cevimeline label, Drug interactions)

  • ClonazepambenzodiazepineMinor

    In a study in which the 2 mg clonazepam orally disintegrating tablet was administered with and without propantheline (an anticholinergic agent with multiple effects on the GI tract) to healthy volunteers, the AUC of clonazepam was 10% lower and the C max of clonazepam was 20% lower when the orally disintegrating tablet was given with propantheline compared to… (Clonazepam label, Drug interactions)

  • Donepezilcholinesterase inhibitorMinor

    Cholinesterase inhibitors have the potential to interfere with the activity of anticholinergic medications ( 7.1 ) (Donepezil label, Drug interactions)

  • Dorzolamidecarbonic anhydrase inhibitorMinor

    Urine pH is altered by diet, drugs (e.g., carbonic anhydrase inhibitors, sodium bicarbonate), and clinical state of the patient (e.g., renal tubular acidosis or severe infections of the urinary tract). (Amantadine label, Drug interactions)

  • Dorzolamide and timololcarbonic anhydrase inhibitorMinor

    Urine pH is altered by diet, drugs (e.g., carbonic anhydrase inhibitors, sodium bicarbonate), and clinical state of the patient (e.g., renal tubular acidosis or severe infections of the urinary tract). (Amantadine label, Drug interactions)

  • Galantaminecholinesterase inhibitorMinor

    Potential to interfere with the activity of anticholinergic medications ( 7.1 ) (Galantamine label, Drug interactions)

  • Sodium bicarbonateantacidMinor

    Urine pH is altered by diet, drugs (e.g., carbonic anhydrase inhibitors, sodium bicarbonate), and clinical state of the patient (e.g., renal tubular acidosis or severe infections of the urinary tract). (Amantadine label, Drug interactions)

  • Sulfamethoxazole and trimethoprimsulfonamideMinor

    In the literature, a single case of toxic delirium has been reported after concomitant intake of sulfamethoxazole/trimethoprim and amantadine. (Sulfamethoxazole and trimethoprim label, Drug interactions)

No significant interaction reported (1)

  • OseltamivirantiviralNo interaction

    …Clinically Significant Drug Interaction with TAMIFLU No dose adjustments are needed for either oseltamivir or the concomitant drug when coadministering oseltamivir with amoxicillin, acetaminophen, aspirin, cimetidine, antacids (magnesium and aluminum hydroxides and calcium carbonates), rimantadine, amantadine, or warfarin [see Clinical Pharmacology (12.3) ] . (Oseltamivir 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.