Malaria is common in areas such as Africa, South America, and Southern Asia. This medicine is not effective against all strains of malaria. History of plaquenil Hydroxychloroquine making sunlight painful Hydroxychloroquine is not approved for use by anyone younger than 18 years old. How should I take hydroxychloroquine? Take hydroxychloroquine exactly as prescribed by your doctor. Follow all directions on your prescription label. Do not take this medicine in larger or smaller amounts or for longer than recommended. Hydroxychloroquine HCQ, sold under the brand name Plaquenil among others, is a medication used for the prevention and treatment of certain types of malaria. Specifically it is used for chloroquine-sensitive malaria. Other uses include treatment of rheumatoid arthritis, lupus, and porphyria cutanea tarda. It is taken by mouth. Hydroxychloroquine may not prevent malaria in all cases. If you experience fever or other symptoms of illness, seek immediate medical attention. You may need a different medication. Hydroxychloroquine may also be used for purposes not listed in this medication guide. Hydroxychloroquine is also used to treat symptoms of rheumatoid arthritis and discoid or systemic lupus erythematosus. Does hydroxychloroquine require a prescription RA and Hydroxychloroquine How Effective is it for Rheumatoid., Hydroxychloroquine - Wikipedia Doxycycline plaquenil lymeDrugs that interact with plaquenilPlaquenil indicationHydroxychloroquine arthritis treatmentPlaquenil used for lyme disease Take this medicine by mouth with a glass of water. Follow the directions on the prescription label. Avoid taking antacids within 4 hours of taking this medicine. It is best to separate these medicines by at least 4 hours. Do not cut, crush or chew this medicine. You can take it with or without food. If it upsets your stomach, take it with food. Hydroxychloroquine tablets - Cleveland Clinic. Hydroxychloroquine Oral Uses, Side Effects, Interactions.. Medicines for the Prevention of Malaria While Traveling.. The action of hydroxychloroquine is cumulative and may require weeks to months to achieve the maximum therapeutic effect see CLINICAL PHARMACOLOGY. Initial adult dosage 400 mg to 600 mg 310 to 465 mg base daily, administered as a single daily dose or in two divided doses. Hydroxychloroquine is a prescription drug. It comes as an oral tablet. Hydroxychloroquine is available as the brand-name drug Plaquenil. It’s also available in a generic version. Hydroxychloroquine is in a class of medications that was first used to prevent and treat malaria. Today, it is used to treat rheumatoid arthritis, some symptoms of lupus, childhood arthritis or juvenile idiopathic arthritis and other autoimmune diseases. It is not clear why hydroxychloroquine is effective.