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. Excessive sleepiness plaquenil Dose of hydroxychloroquine Chloroquin functional groups Hydroxychloroquine sulfate 200 mg cost Plaquenil Adverse Reactions with Treating Lupus and Rheumatoid Arthritis Ocular Reactions The goal with ocular screening for the side effects of Plaquenil is to find the damage at the earliest stage to reduce the amount of vision loss. Plaquenil Side Effects by Likelihood and Severity INFREQUENT side effects. If experienced, these tend to have a Severe expression. A Disorder Of The Retina Of The Eye; I have been taking Plaquenil for about 2 months and aside from some nausea, I have also experienced a tingling in my legs. Mine isn't so much itching, but it is definitely uncomfortable. I must admit I did not read the 1 1/2 single spaced possible side effects because I didn't want to start thinking every little thing that happened was a result. 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. Reactions to plaquenil Hydroxychloroquine Oral Uses, Side Effects, Interactions., Common and Rare Side Effects for Plaquenil Oral Side effects of too much plaquenil Plaquenil is a prescription medication used to reduce pain and swelling caused by diseases of the immune system such as rheumatoid arthritis, juvenile arthritis, and systemic lupus erythematosus SLE. This medication belongs to a group of drugs called DMARDs disease modifying antirheumatic drugs which work by suppressing the excessive activity of the immune system. Plaquenil - Side Effects, Uses, Dosage, Overdose.. Allergic to plaquenil Rheumatoid Arthritis Forums.. Plaquenil - Side Effects, Uses, Dosage, Overdose, Pregnancy.. Does Plaquenil Interact with other Medications? Severe Interactions. These medications are not usually taken together. Consult your healthcare professional e.g. doctor or pharmacist for more in. Plaquenil side effects. Get emergency medical help if you have signs of an allergic reaction to Plaquenil hives; difficulty breathing; swelling of your face, lips, tongue, or throat. Taking Plaquenil long-term or at high doses may cause irreversible damage to the retina of your eye. I had been taking plaquenil since April for my lupus and sjogrens. It was working really well and just recently my rheumy told that I was in remission. I felt great. Then I had an allergic reaction to the plaquenil - a rash all over my body, neck, arms and legs. I stopped taking it 1 week ago.