HYQ 200 Tablet is a prescription medication that contains Hydroxychloroquine (200mg). It is commonly used in the treatment of autoimmune diseases and malaria. Hydroxychloroquine works by modulating the immune system and inhibiting the growth of parasites that cause malaria. This medicine is known for its efficacy in treating conditions like rheumatoid arthritis, lupus, and certain viral infections, making it a versatile treatment option for various medical conditions.