Our team periodically reviews articles in order to ensure content quality. The sources cited below consist of evidence from peer-reviewed journals, prominent medical organizations, academic associations, and government data. Plaquenil how long to take effect Hydroxychloroquine sulphate tabletsrheumatoid arthritis Brazil nuts and plaquenil Plaquenil cholesterol 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. Although not all of these side effects may occur, if they do occur they may need medical attention. Side Effects Panic attacks, anxiety, rapid heartbeat, difficulty breathing, feeling like I am on speed. Generally not feeling well but have an over excess of energy. Generally not feeling well but have an over excess of energy. 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. Diarrhea, vomiting, or stomach pain. Skin rash. Please check with the appropriate physician regarding health questions and concerns. The information contained on this site is for informational purposes only, and should not be used as a substitute for the advice of a professional health care provider. Plaquenil anxiety side effect Plaquenil Oral Uses, Side Effects, Interactions., Hydroxychloroquine Sulfate Anxiety Reports - DrugInformer Can plaquenil cause acneCan hydroxychloroquine get you highPlaquenil testing protocol Side Effects. Drug information provided by IBM Micromedex Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention. Hydroxychloroquine Oral Route Side Effects - Mayo Clinic. Plaquenil Hydroxychloroquine - Side Effects, Dosage.. Does Plaquenil affect your temperament? - LUPUS UK. As PLAQUENIL may enhance the effects of a hypoglycemic treatment, a decrease in doses of insulin or antidiabetic drugs may be required. Drugs That Prolong QT Interval And Other Arrhythmogenic Drugs. PLAQUENIL prolongs the QT interval and should not be administered with other drugs that have the potential to induce cardiac arrhythmias. I've been on Plaquenil 200 mg twice a day for almost three weeks now. Also Doxycycline 100 mg three times a day up until this Monday, when I switched to Biaxin 500 mg twice a day. Since about three days into treatment, I have had anxiety that is just getting worse and worse. I honestly don't know if it's a herx or a side effect. 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.