QuinidexActive 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. 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. .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.