Plaquenil

Hydroxychloroquine, sold under the brand name Plaquenil among others, is a medication used to prevent and treat malaria in areas where malaria remains sensitive to chloroquine. Other uses include treatment of rheumatoid arthritis, lupus, and porphyria cutanea tarda. It is taken by mouth, often in the form of hydroxychloroquine sulfate.[2] Common side effects may include vomiting, headache, changes in vision, and muscle weakness.[2] Severe side effects may inclu... [wikipedia]