It does not work against certain types of malaria (chloroquine-resistant). The United States Center for Disease Control provides updated guidelines and travel recommendations for the prevention and treatment of malaria in different parts of the world. Hydroxychloroquine diabetes 2019 Chloroquine effect on gametocytes Chloroquine rapamacyin Hydroxychloroquine Plaquenil is used to treat malaria, lupus, and rheumatoid arthritis. Learn about side effects, warnings, dosage, and more. What are the possible side effects of hydroxychloroquine? Side effects are uncommon; however, a few people may develop one of the following rash, indigestion, diarrhoea, headache, blurred vision, cramps or muscle weakness, darkening of the skin, or bleaching of the hair. Hydroxychloroquine can aggravate pre-existing psoriasis. 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. This medication is also used, usually with other medications, to treat certain auto-immune diseases (lupus, rheumatoid arthritis) when other medications have not worked or cannot be used. Discuss the most recent information with your doctor before traveling to areas where malaria occurs. Rash from hydroxychloroquine Rash from Methotrexate or Hydroxychloroquine? - NRAS, Hydroxychloroquine Skin Support Plaquenil vision side effectsChloroquine toxicity screeningBlood test for plaquenilPlaquenil prescription assistance programsPlaquenil toxicity reversible Find information about common, infrequent and rare side effects of Plaquenil Oral. Common and Rare Side Effects for Plaquenil Oral. Hydroxychloroquine - Wikipedia. Plaqunil rash -. Hydroxychloroquine may cause a condition that affects the heart rhythm QT prolongation. Hydroxychloroquine typically is very well tolerated. Serious side effects are rare. The most common side effects are nausea and diarrhea, which often improve with time. Less common side effects include rash, changes in skin pigment such as darkening or dark spots, hair changes, and muscle weakness. Rashes is found among people who take Plaquenil, especially for people who are female, 60+ old, have been taking the drug for 1 month, also take medication Enbrel, and have Pain.