1. Quinidine is recommended only for the treatment of severe cases of malaria.2. Procainamide, quinidine and disopyramide are Class Ia agents. 3. Quinidine may interact with chlorpromazine to increase myocardialdepression.4. No injectable preparation of quinine is licensed in the US; quinidine is used instead. 5. Quinidine is a direct derivative of quinine.6. Intravenous quinidine is also indicated for treatment of " Plasmodium falciparum " malaria. 7. Tinnitus is also a classical side effect of quinidine , a Class IA anti-arrhythmic. 8. Quinimax is a combination of four alkaloids ( quinine, quinidine , cinchoine and cinchonidine ). 9. But quinine, and its cousin, quinidine , have side effects and are not always effective. 10. Quinidine toxicity can also invoke episodes of Torsades de Pointes-a rapid and dangerous ventricular rhythm.
