DRUG INTERACTIONS: Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.Fluoxetine (one of the drugs in this medication) can stay in your body for many weeks after your last dose and may interact with many other medications. If you have taken this medication in the previous 5 weeks, consult your doctor or pharmacist before using any other medication.Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription/herbal products you may use, especially of: drugs removed from your body by certain liver enzymes (e.g., carbamazepine, cimetidine, phenytoin, vinblastine, drugs for anxiety such as alprazolam and diazepam, antipsychotics such as aripiprazole/clozapine/haloperidol/perphenazine, antiarrhythmics such as propafenone/flecainide, TCA antidepressants such as desipramine/imipramine), fosamprenavir/ritonavir, metoprolol, "water pills" (diuretics such as furosemide), drugs that can cause bleeding/bruising (e.g., aspirin, antiplatelet drugs such as clopidogrel, NSAIDs such as ibuprofen, "blood thinners" such as heparin, warfarin), drugs for high blood pressure, medicines for Parkinson's disease (e.g., levodopa, cabergoline).Taking MAO inhibitors with his medication may cause a serious (possibly fatal) drug interaction. Avoid taking MAO inhibitors (isocarboxazid, linezolid, methylene blue, moclobemide, phenelzine, procarbazine, rasagiline, selegiline, tranylcypromine) during treatment with this medication. Most MAO inhibitors should also not be taken for 2 weeks before and at least 5 weeks after treatment with this medication. Ask your doctor when to start or stop taking this medication.Many drugs besides fluoxetine may affect the heart rhythm (QT prolongation), including pimozide and thioridazine, among others.Aspirin can increase the risk of bleeding when used with this medication (see above). If your doctor has directed you to take low-dose aspirin for heart attack or stroke prevention (usually at dosages of 81-325 milligrams a day), you should continue taking it unless your doctor instructs you otherwise. Discuss the risks and benefits with your doctor.The risk of serotonin syndrome/toxicity increases if you are also taking other drugs that increase serotonin. Examples include street drugs such as MDMA/"ecstasy" St. John's wort, certain antidepressants (including other SSRIs such as citalopram/paroxetine, SNRIs such as duloxetine/venlafaxine), tryptophan, among others. The risk of serotonin syndrome/toxicity may be more likely when you start or increase the dose of these drugs.Tell your doctor or pharmacist if you are taking other products that cause drowsiness including alcohol, antihistamines (such as cetirizine, diphenhydramine), drugs for sleep or anxiety (such as alprazolam, diazepam, zolpidem), muscle relaxants, and narcotic pain relievers (such as codeine).Check the labels on all your medicines (e.g., cough-and-cold products) because they may contain ingredients that cause drowsiness.Cimetidine is a nonprescription drug that is commonly used to treat extra stomach acid. Because it may cause undesirable interactions when used with fluoxetine, ask your pharmacist about other products to treat stomach acid.Cigarette smoking may decrease blood levels of this medication. Tell your doctor if you smoke or if you have recently stopped smoking.This medication may interfere with certain medical/laboratory tests (including brain scan for Parkinson's disease), possibly causing false test results. Make sure laboratory personnel and all your doctors know you use this drug.
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