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 200 mg oral tablet Benlysta prednisone ldn and plaquenil for lupus Tests to get before starting hydroxychloroquine Plaquenil and losing eyelashes Other side effects people have besides Liver function test abnormal * Drug Ineffective 146 people, 40.22%. Joint Pain 90 people, 24.79%. Fibromyalgia a long-term condition which causes pain all over the body 75 people, 20.66%. Joint Swelling 68 people, 18.73%. Anaemia lack of blood 65 people, 17.91%. 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. Sep 13, 2019 Note This document contains side effect information about hydroxychloroquine. Some of the dosage forms listed on this page may not apply to the brand name Plaquenil. For the Consumer. Applies to hydroxychloroquine oral tablet. Along with its needed effects, hydroxychloroquine the active ingredient contained in Plaquenil may cause some unwanted effects. 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 liver HYDROXYCHLOROQUINE - ORAL Plaquenil side effects., Plaquenil Oral Uses, Side Effects, Interactions. When plaquenil doesn t workCyclophosphamide and hydroxychloroquine side effectsChloroquine po 300 mg daily Check with your doctor immediately if any of the following side effects occur Incidence not known. Blistering, peeling, loosening of the skin blurred vision or other vision changes chest discomfort, pain, or tightness cough or hoarseness dark urine decreased urination defective color vision diarrhea difficulty breathing Hydroxychloroquine Oral Route Side Effects - Mayo Clinic. Plaquenil Side Effects Common, Severe, Long Term -. Common and Rare Side Effects for Plaquenil Oral. Apr 10, 2019 Common Plaquenil 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. Common Side Effects of Plaquenil. Tell your doctor if any of the following side effects, as they may be indications of a more serious reaction Headache; Loss of appetite; Dizziness; Nausea 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 bruising.