HYQ 300 TABLET contains Hydroxychloroquine which belongs to the group of medicines called Antimalarials or Disease-Modifying Anti-Rheumatic Drugs (DMARDs). It is used to manage malarial infection. Malaria is a parasitic infection caused by the plasmodium parasite, which spreads in blood by the bite of an infectious mosquito. It is characterized by symptoms such as fever, chills, sweating, headache, nausea, vomiting, body pain and general discomfort. It is also used to manage rheumatoid arthritis, discoid and systemic lupus erythematosus in adults and manages juvenile idiopathic arthritis in children.