No harmful effects are known. How To Prepare Cinchona preparations range from dried bark to liquid extracts of varying potencies. You can make a medicinal tea by pouring boiling water over one-half teaspoonful of Cinchona and steeping it for 10 minutes. Cinchona should be stored in a well-sealed container, protected from light and moisture. Overdosage Long-term use of Cinchona can lead to a build up of the drug in the body, and hence to an overdose.
Symptoms are primarily due to the bark's quinine content.
If you suspect an overdose, seek medical attention immediately. All rights reserved.