Hetquenil 200 Tablet contains Hydroxychloroquine 200 mg, an antimalarial and immunomodulatory agent primarily used in the treatment and prevention of malaria, as well as autoimmune diseases such as rheumatoid arthritis and systemic lupus erythematosus. Hydroxychloroquine acts by interfering with the communication of cells in the immune system, thereby reducing inflammation and modulating immune responses. It is effective in controlling symptoms and preventing disease progression in chronic inflammatory conditions. Hetquenil 200 is administered orally and should be taken exactly as prescribed by a healthcare professional to minimize potential adverse effects. Common side effects include gastrointestinal disturbances such as nausea, vomiting, and abdominal pain, while more serious but rare adverse effects may involve retinopathy, cardiomyopathy, and myopathy, necessitating regular monitoring during prolonged therapy. Caution is advised in patients with pre-existing retinal or cardiac conditions. It is contraindicated in individuals with hypersensitivity to hydroxychloroquine or related compounds. Due to its potential for drug interactions, a thorough medical history should be evaluated before initiation. Pregnant or breastfeeding women should consult their physician prior to use. Hetquenil 200 Tablet is a valuable therapeutic option in managing malaria and autoimmune disorders when used under appropriate medical supervision.