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. Hydroxychloroquine and the flu Chloroquine method of action Plaquenil side effects teeth Prilosec and plaquenil interactions What is Plaquenil? Plaquenil is a drug used in the acute treatment of malaria. It is also used in the long –term treatment of rheumatoid arthritis and lupus erythematosus. Its generic name is hydroxychloroquine sulfate. Chloroquine has been replaced with hydroxychloroquine as it has less side effects. Eye Exam Before Starting Treatment Many people using this medication do not have serious side your doctor immediately if any of these unlikely but serious side effects occur arm/leg/ back pain, fast heartbeat, hair loss /color change, mental/mood changes e.g. anxiety, depression, hallucinations, ringing in the ears / hearing loss. Side-effects aren't common. However, in some people hydroxychloroquine can cause skin rashes, especially those made worse by sunlight; feeling sick nausea or indigestion; diarrhoea; headaches; bleaching of the hair or mild hair loss; tinnitus ringing in the ears visual problems. 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. What are the side effects of the drug hydroxychloroquine What are the side effects of hydroxychloroquine and., HYDROXYCHLOROQUINE - ORAL Plaquenil side effects, medical. Plaquenil mgPlaquenil screening form In this review, we analyze Hydroxychloroquine sulfate side effects by the time on the drug, gender and age of the people who have side effects while taking Hydroxychloroquine sulfate. The review is based on 11,814 people who have side effects while taking the drug from Food and Drug Administration FDA. Common Hydroxychloroquine sulfate side effects a study from.. Hydroxychloroquine Side-effects, uses, time to work. Hydroxychloroquine - Side Effects, Dosage, Interactions.. 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. 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. For the Consumer. Continuing ringing or buzzing or other unexplained noise in the ears. feeling of constant movement of self or surroundings. irritability. nausea. nervousness. nightmares. sensation of spinning. shakiness and unsteady walk. uncontrolled eye movements. unsteadiness, trembling, or.