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 prescription assistance programs Can you gain weight on 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. Get medical help right away if you have any very serious side effects, including sensitivity to light, vision changes e.g. blurred vision, seeing light flashes/streaks/halos, missing/blacked-out areas of vision, muscle weakness, numbness/tingling/pain of the arms/legs. 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. 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 side effects long term Hydroxychloroquine Side Effects, Dosage, Uses, and More, Plaquenil Oral Uses, Side Effects, Interactions, Pictures. Chloroquine protein synthesisPlaquenil toxicityVisual field test for hydroxychloroquinePlaquenil and dementiaPlaquenil weight gain lupus Common side effects may include headache, dizziness, ringing in your ears; nausea, vomiting, stomach pain; loss of appetite, weight loss; mood changes, feeling nervous or irritable; skin rash or itching; or. hair loss. Plaquenil, Plaquenil Sulfate, Quineprox hydroxychloroquine Uses, Side.. Plaquenil Oral Uses, Side Effects, Interactions.. Hydroxychloroquine Oral Route Side Effects - Mayo Clinic. 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. The review is based on 48,938 people who have side effects while taking the drug from Food and Drug Administration FDA. Common side effects include headache; dizziness; loss of appetite; nausea; diarrhea; stomach pain; vomiting; nervousness; rash; Tell your doctor if you have any side effect that bothers you or does not go away. These are not all the possible side effects Plaquenil. For more information, ask your doctor or pharmacist. Feb 19, 2020 Common side effects may include headache, dizziness, ringing in your ears; nausea, vomiting, stomach pain; loss of appetite, weight loss; mood changes, feeling nervous or irritable; skin rash or itching; or. hair loss.