Flavocoxid is a brand name for a blend of flavenoids that has recently become a tool in the treatment of osteoarthritis.^[1] It is sold under the brand name Limbrel, manufactured by Primus Pharmaceuticals. The capsules also include the ingredient zinc gluconate. Limbrel is used as a nutritional therapy to help reduce inflammation. Flavocoxid has been associated with liver toxicity in prospective clinical trials published in the Annals of Internal Medicine.^[2]