1.Quinine HCL powder is a substance that was first obtained by processing the bark of the cinchona tree, a South American native plant that has been used as a fever reducer by Native Americans for centuries. This substance has been used historically to treat malaria, along with some other medical conditions, and although a number of antimalarial drugs are on the market today, it is still used in some regions. It is also used commercially as an additive to tonic water, a soft drink that is used as a mixer for other drinks in addition to being consumed straight.
2.Quinine HCL Powder is a natural white crystalline alkaloid having antipyretic (fever-reducing), antimalarial, analgesic (painkilling), anti-inflammatory properties and a bitter taste. It is a stereoisomer of quinidine which, unlike Nature Quinine, is an anti-arrhythmic. Sulphate Quinine contains two major fused-ring systems: the bicyclic quinuclidine.

It was used commonly and as a bitter and flavoring agent, and is still useful for the treatment of babesiosis.
Quinine HCL is also useful in some muscular disorders, especially nocturnal leg cramps and myotonia congenita, because of its direct effects on muscle membrane and sodium channels. The mechanisms of its antimalarial effects are not well understood.