Hydroquin Tablet is used for the treatment of autoimmune disorders such as systemic lupus erythematosus (SLE) and rheumatoid arthritis. Autoimmune disease is a condition in which your immune system is not able to distinguish between healthy tissue and harmful pathogen and mistakenly attacks the healthy tissues of the body. It contains hydroxychloroquine as its active ingredient. It works by reducing the action of the immune system. Hydroquin Tablet should be taken as directed by the doctor and in doses and duration as prescribed. It should be taken with a glass of milk or after a meal. Before using the Hydroquin Tablet, inform the doctor if you are pregnant, planning a pregnancy, or are breastfeeding and about your detailed medical history.