Quinidine Extended-Release Effects, Dosage, and Side Effects Quinaglute Dura-Tabs; Quinidex Extendtabs

... QUINIDINE (Quinidex®) is an antiarrhythmic agent. Quinidine treats irregular heart rhythm and can slow rapid heartbeats (tachycardia). Quinidine can help your heart to return to and maintain a normal rhythm. Generic quinidine extended-release tablets are available ...