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. Plaquenil sun exposure Plaquenil and dementia Stopping plaquenil for lupus Plaquenil was a miracle drug for me. It began to work in 3 weeks and within 6 months my inflammation had gone from over 40 to 5.5. And I only took 200mg every other day! A severe and sometimes deadly reaction has happened. Most of the time, this reaction has signs like fever, rash, or swollen glands with problems in body organs like the liver, kidney, blood, heart, muscles and joints, or lungs. If you have questions, talk with the doctor. Side Effects Nausea, stomach cramps, loss of appetite, diarrhea, dizziness, or headache may occur. If any of these effects persist or worsen, notify your doctor or pharmacist promptly. Remember. 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. Plaquenil sunburnt Photosensitivity A Side Effect of RA Medications, Hydroxychloroquine Indications, Side Effects, Warnings. Chloroquine phosphate pregnancyPlaquenil warnings visionPlaquenil treats what symptoms does25 μm chloroquine diphosphateChloroquine lipophilic PLAQUENIL is indicated for the treatment of chronic discoid lupus erythematosus and systemic lupus erythematosus in adults. Rheumatoid Arthritis. PLAQUENIL is indicated for the treatment of acute and chronic rheumatoid arthritis in adults. Plaquenil Hydroxychloroquine Uses, Dosage, Side Effects.. Plaquenil Oral Uses, Side Effects, Interactions.. Coming Off Plaquenil questions - Sclero Forums MAIN.. Hydroxychloroquine and chloroquine may reduce the risk of cancer as they inhibit autophagy, in particular, in people with connective tissue hazard ratios of cancers, metastases, and death were assessed in adults with connective tissue diseases. 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. If you have lupus, you might be photosensitive -- meaning you have an unusually strong reaction to sunlight. In fact, about two-thirds of the people with lupus are UV light-sensitive. Many experience an increase in lupus symptoms after being exposed to ultraviolet UV rays, either from the sun or from artificial light.