Active Ingredient(s): Quinidine
FDA Approved: * February 21, 1962
Pharm Company: * WYETH PHARMS INC
Category: Irregular Heartbeat (Arrhythmia)

Quinidine is a medication that acts as a class I antiarrhythmic agent (Ia) in the heart.[1] It is a stereoisomer of quinine, originally derived from the bark of the cinchona tree. The drug causes increased action potential duration, as well as a prolonged QT interval. As of 2019 it is no longer being manufactured for use in the United States.[2] .mw-parser-output .toclimit-2 .toclevel-1 ul,.mw-parser-output .toclimit-3 .toclevel-2 ul,.mw-parser-output .toclimi... [wikipedia]

* May have multiple approval dates, manufacturers, or labelers.
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