Hydroxychloroquine is a medication that is used to treat a variety of conditions. Here are some of the uses of hydroxychloroquine:

• Malaria: Hydroxychloroquine is used to prevent and treat acute attacks of malaria in adults and children weighing more than 31 kg (68 lbs) .

• Autoimmune conditions: Hydroxychloroquine is used to treat autoimmune conditions such as rheumatoid arthritis and lupus. It works by slowing down an overactive immune system.

• Porphyria cutanea tarda: Hydroxychloroquine is sometimes used to treat porphyria cutanea tarda, a condition in which certain natural substances build up in the body and may cause painful, blistering skin due to sensitivity to sunlight.

• COVID-19: Hydroxychloroquine has been studied for the treatment and prevention of coronavirus disease 2019 (COVID-19). However, it is not recommended for coronavirus infection unless you are enrolled in a study. Talk to your doctor about the possible risks of using this drug for your condition.

It is important to take hydroxychloroquine exactly as directed by your doctor. Do not take more or less of it or take it more often than prescribed. Swallow the tablets whole; do not split, chew, or crush them.