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 and heart issues Feeling weird just started taking hydroxychloroquine Hydroxychloroquine Plaquenil is a drug that is classified as an anti-malarial drug. Plaquenil is prescribed for the treatment or prevention of malaria. It is also prescribed for the treatment of rheumatoid arthritis, lupus, and the side effects of lupus such as hair loss, joint pain, and more. If you experience any of the following symptoms, call your doctor immediately reading or seeing difficulties words, letters, or parts of objects missing. sensitivity to light. blurred distance vision. seeing light flashes or streaks. difficulty hearing. ringing in ears. muscle weakness. Hydroxychloroquine is also an antirheumatic medicine and is used to treat symptoms of rheumatoid arthritis and discoid or systemic lupus erythematosus. Important information. Taking hydroxychloroquine long-term or at high doses may cause irreversible damage to the retina of your eye. 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. Information on the medication plaquenil France cautiously exploring coronavirus treatment based on., Hydroxychloroquine MedlinePlus Drug Information What happens if you stop plaquenil The anti-malaria drug hydroxychloroquine Plaquenil was reportedly found to be highly effective against the coronavirus in a new study from renowned research professor Didier Raoult and the French government is planning to conduct extensive trials on the drug in the near future. French Study Finds Anti-Malaria Drug Chloroquine May Be.. Hydroxychloroquine Uses, Dosage & Side Effects -. Plaquenil Hydroxychloroquine Sulfate. A drug developed over half a century ago to treat malaria is showing signs that it may also help cure COVID-19 -- especially when combined with an antibiotic, a promising new study reveals. Find user ratings and reviews for Plaquenil oral on WebMD including side effects and drug interactions, medication effectiveness, ease of use and satisfaction Plaquenil may be used for short or long-term rheumatoid arthritis treatment. In treating rheumatoid arthritis, Plaquenil may slow down the process of joint damage and relieve the symptoms of the.