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. Hydroxychloroquine class Plaquenil skin changes Chloroquine 150 mg Be sure to notify your other physicians when taking this drug. This drug does not have a strong effect on the immune system, so vaccines recommended by other physicians are generally acceptable. Notify your eye doctor when you are on this medication so regular visual screening tests can be performed. Hydroxychloroquine should not be taken with other drugs that could cause heart arrhythmias irregular heart rate or rhythm. Taking hydroxychloroquine with these drugs could cause dangerous. All individuals starting Plaquenil treatment should have a baseline ophthalmologic examination within the first year. If the initial ophthalmologic examination is normal and the person is considered low risk, re-testing need not occur for five years. 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. Who should not take plaquenil Protecting your eyesight when taking Plaquenil Lupus., Hydroxychloroquine Side Effects, Dosage, Uses, and More Weight loss methotrexate and plaquenilStopping plaquenil before pregnancy PLAQUENIL prolongs the QT interval. Ventricular arrhythmias and torsades de pointes have been reported in patients taking PLAQUENIL see OVERDOSAGE. Therefore, PLAQUENIL should not be administered with other drugs that have the potential to prolong the QT interval see DRUG INTERACTIONS. Worsening Of Psorias Is And Porphyria Plaquenil Hydroxychloroquine Uses, Dosage, Side Effects.. Taking Plaquenil for Rheumatoid Arthritis. Plaquenil Hydroxychloroquine Side effects, Images, Uses.. You should not take Plaquenil if you Are allergic to Plaquenil, hydroxychloroquine sulfate, or any of the inactive components used to make the medication. Your healthcare provider or pharmacist has a list of the inactive ingredients. Are allergic to any similar anti-malarial medications. Have. Here are 10 things to keep in mind when using Plaquenil Take it on a regular schedule, meaning at the same time each day. Take Plaquenil EXACTLY as prescribed by your physician. Do not stop taking the medication without first speaking to your doctor. Taking Hydroxychloroquine with food and/or milk can help prevent stomach upset. Hydroxychloroquine received an overall rating of 7 out of 10 stars from 368 reviews. See what others have said about Hydroxychloroquine, including the effectiveness, ease of use and side effects.