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. Chloroquine diphosphate lysosome Mefloquine in plaquenil Plaquenil and vasculitis In rare cases, Plaquenil can cause cardiomyopathy, a chronic disease of the heart muscle. If you're taking Plaquenil for an autoimmune condition, your symptoms should begin to improve after a few. 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. View detailed reports from patients taking plaquenil who experienced heart rate increased. Reports are from official medical reports as well as online extractions from user reviews and forum discussions. Plaquenil “ Side Effects Dizzy, upset stomach, back pain and side pain, abdominal cramps, leg cramps, rapid heart rate. If you notice any other effects, check with your healthcare professional. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them: Other side effects not listed may also occur in some patients. Plaquenil side effects heart Side Effects of Plaquenil Hydroxychloroquine, Warnings, Uses, Plaquenil Side Effects Common, Severe, Long Term - Hydroxychloroquine pricePlaquenil and antiplatelet drugsHydroxychloroquine sulfate online washington dcChloroquine and proguanil breastfeedingSide effects of hydroxychloroquin 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. Plaquenil Uses, Dosage & Side Effects -. Hydroxychloroquine Sulfate Heart Rate Increased Reports.. Plaquenil Disease Interactions -. What are some other side effects of Plaquenil? All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away Dizziness. Headache. Feeling nervous and excitable. Not hungry. RARE side effects. If experienced, these tend to have a Severe expression. Abnormal Liver Function Tests. Acute Liver Failure. Acute Pustular Eruptions On Skin. Bronchospasm. Decreased Blood Platelets. Decreased White Blood Cells. Consumer information about the medication HYDROXYCHLOROQUINE - ORAL Plaquenil, includes side effects, drug interactions, recommended dosages, and storage information. Read more about the prescription drug HYDROXYCHLOROQUINE - ORAL.