Please review the following URL and make sure that it is spelled correctly. Applies to hydroxychloroquine: oral tablet Along with its needed effects, hydroxychloroquine (the active ingredient contained in Plaquenil) may cause some unwanted effects. Hydroxychloroquine induced cardiomyopathy a case report Chloroquine phosphate rheumatoid arthritis Rheumatoid factor dropped plaquenil Three anti-malarial drugs are prescribed for lupus symptoms. Hydroxychloroquine Plaquenil is the most commonly prescribed because it is generally believed to cause fewer side effects; chloroquine Aralen has a reputation for more serious side effects, but it may be prescribed in situations where hydroxychloroquine cannot be used. Find patient medical information for Plaquenil Oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings. Find patient medical information for Hydroxychloroquine Oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings. 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. Although not all of these side effects may occur, if they do occur they may need medical attention. Plaquenil side effects mayo clinic Plaquenil eye problems Mayo Clinic Connect, Plaquenil Oral Uses, Side Effects, Interactions. Seronegativera plaquenil According to the Mayo Clinic, it can take up to six months' constant use before an effect is seen in RA 1. Plaquenil can cause serious side effects when used in high doses for chronic diseases such as RA over the long term. Long-Term Side Effects of Plaquenil for Rheumatoid Arthritis.. Hydroxychloroquine Oral Uses, Side Effects, Interactions.. Hydroxychloroquine - Side Effects, Dosage, Interactions.. Description and Brand Names. Drug information provided by IBM Micromedex US Brand Name. Plaquenil; Descriptions. Hydroxychloroquine is used to treat malaria. It is also used to prevent malaria infection in areas or regions where it is known that other medicines eg, chloroquine may not work. Hydroxychloroquine may cause some people to be agitated, irritable, or display other abnormal behaviors. It may also cause some people to have suicidal thoughts and tendencies, or to become more depressed. If you or your caregiver notice any of these side effects, tell your doctor right away. This medicine may cause hypoglycemia low blood sugar. Some side effects of hydroxychloroquine may occur that usually do not need medical attention. 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.