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 300 mg Plaquenil fever Plaquenil side effects mouth sores Hydroxychloroquine sulfate 200 tabs 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. Take this medication with a meal or a glass of milk to prevent stomach upset. Common side effects include nausea, loss of appetite, headache, and diarrhea. Plaquenil can cause blurred vision and dizziness. Do not drive or operate heavy machinery until you know how it affects you. Inability to move the eyes. increased blinking or spasms of the eyelid. joint or muscle pain. large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, and sex organs. loss of hearing. lower back or side pain. noisy breathing. painful or difficult urination. red irritated eyes. red skin lesions, often with a purple center 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. Side effects of plaquenil on the eyes Plaquenil - Colorado Springs Eye Clinic, Plaquenil - Side Effects, Uses, Dosage, Overdose, Pregnancy. Plaquenil retinal toxicity doseEffects of plaquenil on hairTaking baseline eye examination before starting plaquenil Some side effects of hydroxychloroquine 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. Hydroxychloroquine Side Effects Common, Severe, Long Term.. Plaquenil Side Effects - GoodRx. Hydroxychloroquine - Wikipedia. Serious side effects and their symptoms can include the following blurred vision or other vision changes. ringing in your ears or hearing loss. angioedema, or rapid swelling of your skin. hives. mild or severe bronchospasm that causes trouble breathing. sore throat. unusual bleeding or. Plaquenil is the brand name of hydroxychloroquine, a drug used to prevent or treat malaria. Plaquenil can cause serious side effects when used in high doses for chronic diseases such as RA over the long term. 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.