Quinidex Extentabs Oral

In Depth

Generic Name: QUINIDINE - ORAL
Pronounced: (KWIN-ih-deen)

Quinidex Extentabs Oral Interactions

Your doctor or pharmacist may already be aware of any possible drug interactions and may be monitoring you for them. Do not start, stop, or change the dosage of any medicine before checking with your doctor or pharmacist first. See also How to Use section.

This drug should not be used with the following medications because very serious (possibly fatal) interactions may occur:

certain HIV protease inhibitors (e.g., ritonavir, nelfinavir, saquinavir)
azole antifungals (e.g., itraconazole, ketoconazole, voriconazole)
propafenone
cisapride
arbutamine
mefloquine
drugs that may affect the heart rhythm (QTc prolonging drugs such as amiodarone, sparfloxacin, grepafloxacin, disopyramide, dofetilide, ibutilide, halofantrine, pimozide, droperidol, levomethadyl, bepridil)

If you are currently using any of these medications listed above, tell your doctor or pharmacist before starting quinidine.

Other drugs besides quinidine and those listed above that may affect the heart rhythm (QT prolongation in the EKG) include sotalol, ziprasidone, mesoridazine, and thioridazine, among others. Before using quinidine, report all medications you are currently using to your doctor or pharmacist. QT prolongation can infrequently result in serious (rarely fatal) fast/irregular heartbeat and other symptoms (e.g., severe dizziness, fainting) that require immediate medical attention. Ask your doctor or pharmacist for more details and for instructions on how you may reduce the risk of this effect.

Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription/herbal products you may use, especially:

large amounts of antacids (e.g., sodium bicarbonate)
barbiturates (e.g., phenobarbital)
carbamazepine
rifamycins (e.g., rifampin, rifabutin)
phenytoin
carbonic anhydrase inhibitors (e.g., acetazolamide)
aripiprazole
atomoxetine
codeine
hydrocodone
loperamide
medication for high blood pressure (e.g., nifedipine, verapamil, diltiazem)
certain macrolide antibiotics (e.g., erythromycin, clarithromycin)
quinupristin/dalfopristin
etravirine
amprenavir/fosamprenavir
certain "water pills" (potassium-wasting diuretics such as hydrochlorothiazide, furosemide)

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.