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Tonic water, also known as Indian tonic water, is a soft drink, carbonated in nature with an additive called as Quinine, which is commonly used in combination with other drinks, like gin. Quinine is actually a medicine, which was used as a prophylactic agent against malaria, whose content has been reduced in tonic. Since it has medicinal effects due to addition of quinine, it got the name Tonic. Tonic water was intended to be used in South Asian and African regions, which has high cases of malaria.
Report Abuse. Tonic water originally contained only carbonated water and a large amount of quinine. However, most tonic water today contains a medically insignificant amount of quinine, and is thus used for its flavor only. It is consequently less bitter, and is also usually sweetened.Quinine derives from the bark of the Cinchona, a tree grown in the Andes.onic water, however, contains too little quinine to actually prevent malaria. Actually, chemically produced quinine in much larger doses is now preferred. Quinine therapy does not exactly kill malaria either, but tends to reduce fever and malarial symptoms.