Quinidine

Generic name: quinidine (oral/injection) [ KWIH-nih-deen ]
Brand names: Quin-G, Cardioquin, Quinora, Quinidex Extentabs, Quinaglute Dura-Tabs, Quin-Release
Dosage forms: oral tablet (200 mg; 300 mg); oral tablet, extended release (324 mg)
Drug class:Group I antiarrhythmics

Medically reviewed by Drugs.com on May 19, 2022. Written by Cerner Multum.

What is quinidine?

Quinidine is used to help keep the heart beating normally in people with certain heart rhythm disorders, usually after other treatments have failed. Quinidine has not been proven to lower the risks of stroke or death.

Quinidine is also used to treat a life-threatening form of malaria.

Quinidine may also be used for purposes not listed in this medication guide.

Warnings

quinidine may increase your risk of death, especially if you have heart problems affecting the tissues or valves of your heart (including heart problems you may have been born with). Ask your doctor about the risks and benefits of using quinidine.

Before taking this medicine

Although quinidine can reduce episodes of irregular heart rhythm, this medicine may increase your risk of death. Your risk may be higher if you have heart problems affecting the tissues or valves of your heart (including heart problems you may have been born with). Ask your doctor about the risks and benefits of using quinidine.

You should not use quinidine if you are allergic to it, or if you have:

• a serious heart condition called "AV block" (unless you have a pacemaker);

• myasthenia gravis; or

• a history of bruising or bleeding after using quinidine or quinine.