DRUG INTERACTIONS: Your healthcare professionals (e.g., doctor or pharmacist) may already be aware of any possible drug interactions and may be monitoring you for it. Do not start, stop or change the dosage of any medicine before checking with them first.Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription/herbal products you may use, especially of: anticholinergics (e.g., atropine), dopamine agonists (e.g., cabergoline, pergolide), guanadrel, guanethidine, lithium.Also report the use of drugs which might increase seizure risk (decrease seizure threshold) when combined with fluphenazine, such as isoniazid (INH), theophylline, or tramadol, among others. Consult your doctor or pharmacist for more details.Tell your doctor or pharmacist if you also take drugs that cause drowsiness such as: antihistamines that cause drowsiness (e.g., diphenhydramine), anti-anxiety drugs (e.g., diazepam), anti-seizure drugs (e.g., carbamazepine), medicine for sleep (e.g., zolpidem), muscle relaxants, narcotic pain relievers (e.g., codeine), other psychiatric medicines (e.g., other phenothiazines such as chlorpromazine, or tricyclics such as amitriptyline), tranquilizers.Check the labels on all your medicines (e.g., cold-and-cough products) because they may contain drowsiness-causing ingredients. Ask your pharmacist about the safe use of those products.This drug may interfere with certain laboratory tests (pregnancy test, phenylketonuria test, some urine tests). Make sure laboratory personnel and your doctors know you use this drug.This document does not contain all possible interactions. Therefore, before using this product, tell your doctor or pharmacist of all the products you use. Keep a list of all your medications with you, and share the list with your doctor and pharmacist.
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