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. Baseline labs required before starting plaquenil What happens if you stop plaquenil When was plaquenil invented Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Plaquenil Side Effects by Likelihood and Severity. The information is not intended to cover all possible uses, directions, precautions, drug interactions or adverse effects, nor should it be. Hydroxychloroquine Plaquenil is used to treat malaria, lupus, and rheumatoid arthritis. Learn about side effects, warnings, dosage, and more. 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. Generic plaquenil side effects Hydroxychloroquine Side Effects Common, Severe, Long Term., Common and Rare Side Effects for Plaquenil Oral Lysosomal inhibitor chloroquineDid plaquenil work for you Find user ratings and reviews for Plaquenil oral on WebMD including side effects and drug interactions, medication effectiveness, ease of use and satisfaction Plaquenil oral Reviews and User Ratings Effectiveness, Ease of Use.. Hydroxychloroquine Side Effects, Dosage, Uses, and More. Hydroxychloroquine Oral Route Side Effects - Mayo Clinic. 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. Hydroxychloroquine is a disease-modifying anti-rheumatic drug DMARD used for rheumatoid arthritis and lupus. Learn how long it takes, risks and side-effects. She started me on the generic version of Plaquenil at 200 mg. I have had a really hard time on this medicine. I have had extreme nausea, diarrhea, stomach cramps, and intense vertigo. I began taking it on Thanksgiving day and still experience these side effects. A week ago I asked if there was anything we could do and she stated that this was t.