Quinacainol dihydrochloride (PK 10139 dihydrochloride) is the dihydrochloride salt form of Quinacainol. Quinacainol dihydrochloride is an inhibitor for sodium current with an EC 50 of 95 µM. Quinacainol dihydrochloride exhibits antiarrhythmic activity by affecting the electrophysiological properties of the heart.