It's used to treat and prevent malaria infection, and to reduce symptoms and progression of autoimmune diseases such as lupus, rheumatoid arthritis, and others. Malaria is spread by mosquitoes, which transmit the parasites that cause the infection, usually in tropical and subtropical parts of the world. Chloroquine for lung cancer Chloroquine and anxiety Plaquenil 400 mg Chloroquine heme transferase Consumer information about the medication HYDROXYCHLOROQUINE - ORAL Plaquenil, includes side effects, drug interactions, recommended dosages, and storage information. Many people using this medication do not have serious side your doctor immediately if any of these unlikely but serious side. easy bleeding/bruising, signs. Some side effects 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. Now, easy bruising without trauma is a different story. It could be due to health conditions like a shortage of platelets, bleeding disorders, and deficiencies in vitamin C, vitamin K or protein. Or, more commonly, it could be the result of a medication or supplement side effect. For example, it may be combined with an antibiotic to treat chronic Q-fever, which humans usually catch from farm animals or raw milk. Plaquenil is used to treat other types of infections too. Easily bruising side effect of plaquenil Bruising easily? Plaquenil? Just lupus in general? lupus, Plaquenil Side Effects - GoodRx Can plaquenil and metoprolol tartrate Hallucinations, seizures, and hearing loss are among the serious side effects of Plaquenil. This eMedTV Web page provides a more in-depth list of potentially dangerous reactions and explains when to report such problems to your doctor. When to Report Reactions to Plaquenil. Bruising for No Reason? It Could Be Due to These.. Is frequent bruising a side effect of Plaquenil?. Hydroxychloroquine side effects may vary greatly from very mild side effects that go away with time to severe side effects like eye damage, ear damage, or heart problems. Some side effects may be experienced as the body adjusts to hydroxychloroquine but may diminish as the body becomes used to the drug. Summary Increased tendency to bruise is found among people who take Plaquenil, especially for people who are female, 50-59 old, have been taking the drug for 6 - 12 months, also take medication Enbrel, and have Osteoporosis. 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. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about.