they outlawed quinine? When did that happen?

I know that there's quinine in tonic water. We had a contractor once that worked on something at our house, and one of the things he asked for when we hired him, was to have some tonic water available for him. Apparently he'd gotten malaria somewhere (he might have been a Vietnam vet) and he drank the tonic water to help the symptoms of that, if I remember right, the symptoms of the malaria could be triggered by hot temperatures. Kind of like MS symptoms being triggered by increased temperatures.