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. Chloroquine intercalation Visual field testing for plaquenil toxicity The plaquenil has caused a weight gain of about 20-25 pounds for me. Since I was diagnosed with MCTD a year ago, Plaquenil has been the only medication besides eye supplements, thyroid meds - been stable for years, and most recently Evoxac that I have been given. Common Plaquenil side effects - a study from FDA data Summary In this review, we analyze Plaquenil side effects by the time on the drug, gender and age of the people who have side effects while taking Plaquenil. Plaquenil side effects Get emergency medical help if you have signs of an allergic reaction to Plaquenil hives; difficulty breathing; swelling of your face, lips, tongue, or throat. Taking Plaquenil long-term or at high doses may cause irreversible damage to the retina of your eye. 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 Dangers of plaquenil - Answers on HealthTap, Common Plaquenil side effects a study from FDA data - eHealthMe Who can prescribe plaquenilPlaquenil toxicity treatmentPlaquenil and stem cell injectionVinegar plaquenil Common side effects Nausea and diarrhea This can often can be combatted by taking Plaquenil with food or milk. Dizziness Precautions with this side effect Do not drive, use machinery. Cramps. Headache. Dry skin. Loss of appetite. Plaquenil What You Need to Know - Kaleidoscope Fighting Lupus. Plaquenil Uses, Dosage & Side Effects -. Plaquenil Hydroxychloroquine - Side Effects, Dosage.. One of the reasons that physicians feel comfortable in prescribing Plaquenil is its low risk to benefit ratio. This means that the side effects of Plaquenil are mild and infrequent compared with its potential benefits. As with any medication, allergic reactions including skin rashes and non-allergic reactions can occur. Based on this information, possible bothersome but usually not dangerous side effects of Plaquenil may include Nausea and vomiting. Diarrhea and abdominal pain. Headaches. Dizziness or a spinning sensation vertigo. Ringing in the ears tinnitus. Loss of appetite. Nightmares. Any of the following, especially combined, could point to nephritis. Foamy Urine- Blood in the Urine- Pain in Your Mid-back or ‘Flank’. Swelling- Usually in the legs, feet, or ankles edema. Dark Urine. High Blood Pressure. Changes in Frequency of Urination. Vomiting. Water Retention/.