Quinidine sulphate

Quinidine is an antiarrhythmic agent prescribed for the reduction of unusually high heart rates. It is derived from the bark of the cinchona tree. The medicinal effects of quinidine were originally identified by the eighteenth-century French physician, Jean-Baptiste de Senac. Quinidine is one of four alkaloids derived from cinchona utilised for antiarrhythmic properties, and is generally considered the most reliable of them all.