Update #1
Hydroxychloroquine is an antimalarial and immunosuppressive drug used to treat malaria and certain autoimmune diseases like rheumatoid arthritis and lupus. It works by reducing inflammation in the body. At one point, it gained attention as a potential treatment for COVID-19, but subsequent research found limited efficacy and potential risks. Hydroxychloroquine should only be used under medical supervision due to its side effects, including vision problems and heart rhythm disturbances, and its use in COVID-19 is not recommended by health authorities.