CompositionGlucosamine (750 mg) SALT INFORMATIONGlucosamine (750 mg) TYPICAL USAGE Osteoarthritis, rheumatoid arthritis. SIDE EFFECTS Heart burn, epigastric pain/tenderness, diarhea, nausea, dyspepsia, constipation, abdominal pain, palpitations, drowsiness, skin reaction, headache, indigestion. DRUG INTERACTION Osteoarthritis, rheumatoid arthritis. MECHANISM OF ACTION Glucosamine is an amino sugar and a prominent precursor in the biochemical synthesis of glycosylated proteins and lipids. Oral glucosamine is commonly used for the treatment of osteoarthritis. Since glucosamine is a precursor for glycosaminoglycans are a major component of joint cartilage, supplemental glucosamine may help to rebuild cartilage and treat arthritis.