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. Chloroquine sensitive p falciparum area Chloroquine phosphate rheumatoid arthritis Plaquenil hydroxychloroquine is in a class of drugs called disease-modifying anti-rheumatic drugs, which are used to decrease inflammation, pain and joint damage. While today it is used to treat autoimmune conditions, such as rheumatoid arthritis and lupus, it was originally used as an anti-malaria drug. Serious side effects. 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. blue-black skin color. muscle weakness. hair. If you notice other effects not listed above, contact your doctor or the US -Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345. 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 can you drink Common and Rare Side Effects for Plaquenil Oral, Hydroxychloroquine Side Effects, Dosage, Uses, and More Plaquenil dose hydroxychloroquineImuran and plaquenilIs hydroxychloroquine sulfate an immunosuppressive drugHydroxychloroquine pigmentationWhat can you take instead of plaquenil Get medical help right away if you have any very serious side effects, including chest pain, fast/irregular heartbeat, severe dizziness, fainting, seizures. A very serious allergic reaction to. Plaquenil Oral Uses, Side Effects, Interactions, Pictures.. HYDROXYCHLOROQUINE - ORAL Plaquenil side effects, medical.. Plaquenil Uses, Dosage & Side Effects -. Hi pat i do not suffer from any side effects taking plaquenil but u mus get ur eyes checked at least every 6 mos or yearly the main side effect is blindness.thank God i have not had any problems and have been taking it for many years.this helps good luck n God bless Possible side effects of methotrexate include nausea, vomiting, and abnormal liver function. Some patients develop mouth sores, rash, or diarrhea. Tell your doctor if you develop shortness of breath or chronic cough. Additionally, some patients may experience hair loss. I started taking Plaquenil, and I'm supposed to be taking two 200mg pills a day, but I'm only taking one for a week to ease into it. So far I've woken up every morning very nauseous and with a lot of stomach pain and fatigue early in the day plus diarhea. I heard the side effects go away after a.