Although not all of these side effects may occur, if they do occur they may need medical attention. Check with your doctor immediately if any of the following side effects occur while taking hydroxychloroquine: Incidence not known Some side effects of hydroxychloroquine may occur that usually do not need medical attention. Diphenhydramine interaction with plaquenil Plaquenil generic vs brand Plaquenil hydroxychloroquine belongs to a group of medicines called quinolines. Plaquenil is used to treat or prevent malaria, a disease caused by parasites that enter the body through the bite of a mosquito. Malaria is common in areas such as Africa, South America, and Southern Asia. Hydroxychloroquine Plaquenil is considered a disease-modifying anti-rheumatic drug DMARD. It can decrease the pain and swelling of arthritis. It may prevent joint damage and reduce the risk of long-term disability. Hydroxychloroquine is in a class of medications that was first used to prevent and treat malaria. Hydroxychloroquine is used to treat or prevent malaria, a disease caused by parasites that enter the body through the bite of a mosquito. Malaria is common in areas such as Africa, South America. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. These side effects may go away during treatment as your body adjusts to the medicine. Antimalarials hydroxychloroquine Hydroxychloroquine - Wikipedia, Hydroxychloroquine Plaquenil Hydroxychloroquine and azithromycinPlaquenil forum discussion Hydroxychloroquine belongs to a group of medicines known as antimalarials. It works by preventing or treating malaria, a red blood cell infection transmitted by the bite of a mosquito. However, this medicine is not used to treat severe or complicated malaria. Hydroxychloroquine Oral Route Description and Brand Names.. Hydroxychloroquine - Side Effects, Dosage, Interactions.. Antimalarials for Rheumatoid Arthritis. Hydroxychloroquine is considered safer than chloroquine during pregnancy and lactation. Hydroxychloroquine is rapidly absorbed from the gastrointestinal tract, and steady-state concentrations are reached after 4–6 weeks; 45% of hydroxychloroquine binds to plasma proteins that are deposited in tissues such as the liver, spleen, kidney, and lung. Plaquenil is the brand name for the prescription drug hydroxychloroquine. It's used to treat and prevent malaria infection, and to reduce symptoms and progression of autoimmune diseases such as lupus, rheumatoid arthritis, and others. Antimalarials. Hydroxychloroquine 6 mg/kg/day, max 400 mg/day is routinely used at the onset of disease in children and adolescents with SLE to reduce symptoms of fatigue, mucocutaneous manifestations, and alopecia, as well as a steroid toxicity–sparing agent. Efficacy of antimalarials in SLE has been demonstrated in clinically stable.