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. Malaria is spread by mosquitoes, which transmit the parasites that cause the infection, usually in tropical and subtropical parts of the world. Hydroxychloroquine and birth control pills Chloroquine-resistant plasmodium falciparum Chloroquine has been replaced with hydroxychloroquine as it has less side effects. Eye Exam Before Starting Treatment. If a person is going to be treated long-term with Plaquenil, they need to have a thorough dilated eye exam with best corrected visual acuity, central visual field, color vision, and dilated examination of the retina. MORE COMMON side-effects include Nausea & diarrhea – Plaquenil agrees with most people. Rarely it can cause an upset stomach or diarrhea. Skin rash – Plaquenil can rarely cause a rash. Patients who experience this rare side effect should stop taking this medicine and contact their doctor. Headaches – Plaquenil can rarely cause a headache. Hydroxychloroquine Plaquenil and chloroquine cause ocular toxicity to various parts of the eye such as the cornea, ciliary body, and retina. Chloroquine can also induce cataract formation; however, no reports of hydroxychloroquine and cataract have been reported 1. For example, it may be combined with an antibiotic to treat chronic Q-fever, which humans usually catch from farm animals or raw milk. Plaquenil is used to treat other types of infections too. Plaquenil dangers Plaquenil Side Effects - Antibiotics Home Page, Plaquenil – RheumInfo Plaquenil positive reviewsDoes hydroxychloroquine suppress the immune systemHydroxychloroquine and trametinib Plaquenil. Uses. Hydroxychloroquine is used to prevent or treat malaria infections caused by mosquito bites. It does not work against certain types of. Side Effects. Precautions. Interactions. Plaquenil Oral Uses, Side Effects, Interactions.. Hydroxychloroquine toxicity - EyeWiki. Plaquenil & Weight Gain/Loss -. All of these risks are very low and the benefits of Plaquenil hydroxychloroquine will far out weight the risks. Doctors give trusted answers on uses, effects, side-effects, and cautions Dr. Ali on dangers of plaquenil Potential Plaquenil hydroxychloroquine side effects include GI intolerance, itching, rash, muscle weakness and eye inflammation retinopathy. Aug 14, 2017 Plaquenil is the brand name of hydroxychloroquine, a drug used to prevent or treat malaria. Plaquenil is also used for long-term treatment of autoimmune diseases such as rheumatoid arthritis RA and systemic lupus erythmatosis. For the Consumer. Blistering, peeling, loosening of the skin. blurred vision or other vision changes. chest discomfort, pain, or tightness. cough or hoarseness. dark urine. decreased urination. defective color vision. diarrhea. difficulty breathing. difficulty seeing at night.