Buy Hydroxychloroquine Online is an antimalarial and immunomodulatory drug used to treat malaria, lupus, and rheumatoid arthritis. It works by interfering with communication between cells in the immune system and altering the pH level inside immune cells, reducing inflammation. In malaria, it prevents the parasite from digesting hemoglobin, leading to its death. Hydroxychloroquine also helps regulate overactive immune responses in autoimmune conditions, easing symptoms like joint pain and swelling. Its broad mechanism of action and anti-inflammatory properties make it a valuable medication, though it requires careful monitoring for potential side effects such as eye or heart complications.