Hydroxychloroquine  is a medication primarily known for its use in treating certain autoimmune diseases, most notably malaria and lupus, as well as rheumatoid arthritis. It belongs to the class of drugs called antimalarials and works by interfering with the replication of parasites, including the malaria-causing Plasmodium species. Additionally, it has immunomodulatory properties that make it effective in managing autoimmune conditions by suppressing an overactive immune response. Hydroxychloroquine gained significant attention during the COVID-19 pandemic, with some advocating its use as a potential treatment for the virus, although its efficacy for this purpose remains a subject of debate and ongoing research. It's essential to emphasize that the use of hydroxychloroquine 200mg , especially for COVID-19, should be guided by healthcare professionals, considering the latest scientific evidence and potential side effects, as its misuse can pose risks to patients' health.