Hydroxychloroquine is a medication used to prevent and treat malaria, lupus, and rheumatoid arthritis. These multi-color white tablets contain hydroxychloroquine sulfate, which helps reduce inflammation and suppress the immune system in autoimmune conditions. The tablet’s distinctive appearance, with multiple colors, makes it easy to identify. Hydroxychloroquine works by interfering with the growth of parasites in the blood or reducing immune system activity in autoimmune diseases. It is typically taken by mouth with food to prevent stomach upset. Dosage is determined by the condition being treated and patient needs. Regular medical monitoring is important while using this medication. Side effects can include nausea, headache, or dizziness, so it's important to follow your doctor's instructions closely when using hydroxychloroquine.