Quinine dihydrochloride, Quinine sulfate Group: Miscellaneous Description: toxic alkaloid extracted from the bark of cinchona tree; used as flavorings in carbonated beverages (primarily bitter lemon and tonic water), bitters and as a treatment for malaria; side effects are headache, nausea, ringing in the ears and blurred vision; FDA strictly limits the amounts of it that can be used Animal origin: No << Back to: Miscellaneous << Back to: Main page