thioridazine - oral (cont.)
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.This drug should not be used with the following medications because very serious interactions may occur: cabergoline, cisapride, duloxetine, certain SSRI antidepressants (e.g., fluoxetine, fluvoxamine, paroxetine), pergolide, pindolol, propranolol, sibutramine.If you are currently using any of these medications listed above, tell your doctor or pharmacist before starting thioridazine.Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription/herbal products you may use, especially of: anticholinergic medications (e.g., belladonna alkaloids, atropine, scopolamine), carbamazepine, guanethidine, guanadrel, lithium, medications for Parkinson's disease (e.g., levodopa, benztropine).Many drugs besides thioridazine may affect the heart rhythm (QT prolongation), including amiodarone, dofetilide, pimozide, procainamide, quinidine, sotalol, macrolide antibiotics (such as erythromycin), among others. Therefore, before using thioridazine, report all medications you are currently using to your doctor or pharmacist.Also report the use of drugs which might increase seizure risk (decrease seizure threshold) when combined with this drug such as bupropion, isoniazid, haloperidol, theophylline, tramadol, or tricyclic antidepressants (e.g., amitriptyline, nortriptyline), among others.Tell your doctor or pharmacist if you also take drugs that cause drowsiness such as: certain antihistamines (e.g., diphenhydramine), anti-seizure drugs (e.g., phenytoin), medicine for sleep or anxiety (e.g., alprazolam, diazepam, zolpidem), muscle relaxants, narcotic pain relievers (e.g., codeine), psychiatric medicines (e.g., chlorpromazine, risperidone, trazodone).Check the labels on all your medicines (e.g., cough-and-cold products) because they may contain drowsiness-causing ingredients. Ask your pharmacist about the safe use of those products.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.
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
Need help identifying pills and medications?
Back to Medications Index