May 22, 2017
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Quinidine Sulfate

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Quinidine Sulfate

Quinidine Sulfate
(quinidine sulfate) Tablet, Film Coated, Extended Release


Quinidine is an antimalarial schizonticide and an antiarrhythmic agent with Class la activity; it is the d-isomer of quinine, and its molecular weight is 324.43. Quinidine sulfate (quinidine sulfate (quinidine sulfate (quinidine sulfate tablet, film coated, extended release) tablet, film coated, extended release) tablet, film coated, extended release) is the sulfate salt of quinidine; its chemical name is cinchonan-9-ol, 6'-methoxy-, (9S)-, sulfate (2:1) (salt) dihydrate; its molecular weight is 782.94, of which 82.9% is quinidine base; and it has the following structural formula:

Quinidine Sulfate (quinidine sulfate) structural formula illustration

(C20H24N202)2•H2S04•2H20        M.W. 782.94

Each Quinidine Sulfate Extended-release Tablet contains 300 mg of quinidine sulfate (quinidine sulfate (quinidine sulfate (quinidine sulfate tablet, film coated, extended release) tablet, film coated, extended release) tablet, film coated, extended release) (249 mg of quinidine base) in a formulation to provide extended release; the inactive ingredients are: fumaric acid, hypromellose, lactose monohydrate, magnesium stearate, polydextrose, polyethylene glycol, povidone, triacetin and titanium dioxide.

These tablets comply with USP Drug Release Test 1.

What are the precautions when taking quinidine sulfate tablet, film coated, extended release (Quinidine Sulfate)?

Before taking quinidine, tell your doctor or pharmacist if you are allergic to it; or to quinine; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

This medication should not be used if you have certain medical conditions. Before using this medicine, consult your doctor or pharmacist if you have: certain types of heart disease (e.g., incomplete or complete heart block without an artificial pacemaker, torsades-type irregular heartbeats, digitalis toxicity), very low blood pressure, history of easy bruising/bleeding (thrombocytopenic purpura) with use of quinine or quinidine, severe muscle weakness (myasthenia gravis).

Before using this medication,...

Read All Potential Precautions of Quinidine Sulfate »

Last reviewed on RxList: 11/28/2016
This monograph has been modified to include the generic and brand name in many instances.

Quinidine Sulfate - User Reviews

Quinidine Sulfate User Reviews

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