Pirmenol is a class I antiarrhythmic agent.1,2,3 It lengthens the final repolarization of action potentials in isolated rabbit ventricular myocytes and inhibits tachyarrhythmias induced by prolonged afterdepolarizations in isolated guinea pig papillary muscles when used at a concentration of 5 µM.1 Pirmenol (2.5 and 5 mg/kg) suppresses ouabain- or epinephrine-induced ventricular arrhythmias and aconitine-induced atrial arrhythmias in dogs.2,3
1.Sawanobori, T., Adaniya, H., Yamashita, S., et al.Electrophysiologic and antiarrhythmic actions of pirmenol on rabbit and guinea pig cardiac preparationsJ. Cardiovasc. Pharmacol.16(6)975-983(1990) 2.Kaplan, H.R., Mertz, T.E., and Steffe, T.J.Preclinical pharmacology of pirmenolAm. J. Cardiol.59(16)2H-9H(1987) 3.Steffe, T.J., Mertz, T.E., Hastings, S.G., et al.CL-845 (pirmenol hydrochloride): A new orally effective long-acting antiarrhythmic agentJ. Pharmacol. Exp. Ther.214(1)50-57(1980)