Active Ingredient

Chloroquine

Chloroquine is a medication primarily used to prevent and treat malaria, a disease caused by parasites. It is also used in some cases for the management of certain autoimmune conditions.

It works by interfering with the growth of parasites in the red blood cells. Chloroquine is an important tool in the fight against malaria and other parasitic infections.

Written By Douglas C. Goldberg, MD

Reviewed By Philip Schein, MD

Last Updated 28 Nov 2025

Available Chloroquine Brands

Chloroquine

Strengths 250mg, 500 mg

Chloroquine Uses

Chloroquine is commonly used in the treatment and prevention of malaria and can also be beneficial for other conditions.

Prevention and treatment of malaria
Treatment of extraintestinal amebiasis
Management of rheumatoid arthritis
Management of lupus erythematosus

How Chloroquine Works

Chloroquine works by entering the red blood cells and interfering with the growth of the malaria parasite. It disrupts the parasite’s ability to process hemoglobin, which is vital for its survival.

This action helps to clear the infection from the body. In autoimmune diseases, it may work by modulating the immune system to reduce inflammation.

Common side effects of Chloroquine

Not everyone will experience side effects from chloroquine, and many of these effects are mild and temporary.

Nausea
Headache
Dizziness
Stomach upset
Blurred vision
Itching

If you experience serious or persistent side effects, contact your doctor.

Frequently Asked Questions

How long does it take for chloroquine to work?

The effects of chloroquine can be noticed within a few days, but it might take longer for full benefits in some conditions.

Can I take chloroquine with other medications?

It’s important to inform your doctor about all medications you are taking to avoid potential interactions.

What should I do if I miss a dose?

If you miss a dose, take it as soon as you remember. If it’s close to your next dose, skip the missed dose and continue your regular schedule.

Is chloroquine safe for long-term use?

Long-term use of chloroquine should be monitored by a healthcare professional to manage any potential side effects.

Can I drink alcohol while taking chloroquine?

It’s advisable to limit alcohol consumption while taking chloroquine to minimize the risk of side effects.