Hydroxychloroquine is available as the brand-name drug Plaquenil. Generic drugs usually cost less than the brand-name version. Hydroxychloroquine may be used as part of a combination therapy. Does plaquenil cause sun sensitivity Hydroxychloroquine screening test Chloroquine dosage for malaria prevention Aug 29, 2014 This means that the side effects of Plaquenil are mild and infrequent compared with its potential benefits. As with any medication, allergic reactions including skin rashes and non-allergic reactions can occur. The side effect that is of greatest concern is retinal toxicity. Hi I have taken Plaquenil since 1995 i was diagnosed with Lupus sle i have never had that side effect. though i do know that if you take too much fiber you will get constipation so i cut down on the fiber and drank juice & ground flax seed.& i take flexeril at night. you all are in my prayers good luck. hopefull you will ask the Plaquenil ® hydroxychloroquine sulfate is a prescription anti-malarial medicine. It is possible to take too much of this medication. The specific effects of a Plaquenil overdose can be quite dangerous and will vary depending on a number of factors, including the Plaquenil dosage and whether it was taken with any other medications or substances. Hydroxychloroquine is used to treat lupus erythematosus and rheumatoid arthritis. It isn’t fully understood how this drug works to treat lupus erythematosus or rheumatoid arthritis. That means you may need to take it with other drugs. It treats malaria by killing the parasites that cause the disease. Side effects of taking too much plaquenil Plaquenil side effects - Scleroderma - Inspire, Bad Side Effects of Plaquenil - Chloroquine diphosphate autophagy Plaquenil can cause serious side effects when used in high doses for chronic diseases such as RA over the long term. The New Zealand Dermatological Society recommends that to decrease the risk of retina damage, no more than 200mg of Plaquenil should be taken a day, and a dose of 400mg per day should be taken no longer than a few weeks. Long-Term Side Effects of Plaquenil for Rheumatoid.. Plaquenil Overdose - Antibiotics Home Page. Rx Side Effects New Plaquenil Guidelines and More - American.. Tell your doctor right away if you have any serious side effects, including arm/leg/back pain, slow heartbeat, symptoms of heart failure such as shortness of breath, swelling ankles/feet. 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. Children taking this medication for a long period of time may experience permanent damage to their vision and other side effects. How to take hydroxychloroquine All possible dosages and forms may.