This secret, proprietary remedy contained quinine and a number of different other herbs.

It contains quinine, which is a chemical used to treat malaria.

Cinchona bark contains quinine and related chemicals.

The bark contained quinine, used to treat malaria.

The first effective treatment for malaria came from the bark of cinchona tree, which contains quinine.

The FDA issued the advice today and ordered all unapproved drugs containing quinine off the market within 60 days.

There are multiple unapproved products containing quinine currently marketed.

The bark of the Chinona family of trees contains quinine.

It was mixed with tonic water that contained quinine as a remedy against malaria.

The pills were eventually analysed and found to contain only quinine.