It is primarily used as an oral antiarrhythmic medication in tablet or capsule form for treating life-threatening ventricular arrhythmias and supraventricular tachycardias. It functions as a sodium channel blocker with weak beta-blocking and calcium channel blocking effects.

Its main purpose is to stabilize cardiac cell membranes slow conduction in the His-Purkinje system and prolong PR and QRS intervals to control abnormal heart rhythms like paroxysmal supraventricular tachycardia and ventricular arrhythmias.

Propafenone Hydrochloride is a white to white crystalline powder the hydrochloride salt of propafenone with a molecular weight of 377.9 gmol. it is slightly soluble in water soluble in methanol and exhibits maximum absorption at 303 nm. This action slows the electrical signals that cause the heart to beat helping to stabilize the hearts rhythm. It is typically available as tablets or extended-release capsules and appears as a white crystalline powder in its raw form.