Propafenone HCl API CAS: 54063-53-5
Information: Propafenone hydrochloride is an antiarrhythmic drug. Propafenone has some structural similarities to beta-blocking agents. The electrophysiological effect of propafenone hydrochloride manifests itself in a reduction of upstroke velocity (Phase 0) of the monophasic action potential. In Purkinje fibers, and to a lesser extent myocardial fibers, propafenone hydrochloride reduces the fast inward current carried by sodium ions. Diastolic excitability threshold is increased and effective refractory period prolonged. Propafenone reduces spontaneous automaticity and depresses triggered activity.
Studies in anesthetized dogs and isolated organ preparations show that propafenone has beta-sympatholytic activity at about 1/50 the potency of propranolol. Clinical studies employing isoproterenol challenge and exercise testing after single doses of propafenone indicate a beta-adrenergic blocking potency (per mg) about 1/40 that of propranolol in man. In clinical trials, resting heart rate decreases of about 8% were noted at the higher end of the therapeutic plasma concentration range. At very high concentrations in vitro, propafenone can inhibit the slow inward current carried by calcium but this calcium antagonist effect probably does not contribute to antiarrhythmic efficacy. Propafenone has local anesthetic activity approximately equal to procaine.

Synonyms: 2′-(2-Hydroxy-3-(propylamino)propoxy)-3-phenylpropiophenone hydrochloride; Arythmol; Baxarytmon; Fenoprain; Pronon; Propafenon hydrochlorid; Propafenon hydrochlorid [German]; Propafenone hydrochloride; Rhythmonorm; Rythmol; Rythmol SR; Rytmonorm; SA 79; UNII-33XCH0HOCD; WZ 884; 1-(2-(2-Hydroxy-3-(propylamino)propoxy)phenyl)-3-phenylpropan-1-one hydrochloride; 1-Propanone, 1-(2-(2-hydroxy-3-(propylamino)propoxy)phenyl)-3-phenyl-, hydrochloride; Propiophenone, 2′-(2-hydroxy-3-(propylamino)propoxy)-3-phenyl-, hydrochloride; 1-{2-[2-hydroxy-3-(propylamino)propoxy]phenyl}-3-phenylpropan-1-one hydrochloride (1:1)

Molecular Formula: C21H28ClNO3