As of December 2015, there are no side effects associated with using cherry extract, according to WholeHealthMD.com. When taken in small doses, it is possibly safe to use over a short amount of time, but is likely unsafe to use when pregnant or breast feeding, states WebMD.
Cherry extract is a medication used to prevent gout and to treat inflammation and pain associated with arthritis, reports WholeHeathMD.com. Cherries are rich in flavonoids, which are antioxidants that break apart and lessen the damage done by free radicals in the body. Cherry extract is obtained by ingesting either cherry juice or cherry pills, or by eating actual cherries, according to Arthritis Foundation.