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. John hopkins research on plaquenil Alcohol dehydrogenase chloroquine Jan 01, 2020 Rheumatoid Arthritis and Systemic Lupus Erythematosus. Mechanism of action The mechanisms underlying the anti-inflammatory and immunomodulatory effects of Plaquenil are unknown. Indications and Usage for Plaquenil Malaria. Plaquenil is indicated for the treatment of uncomplicated malaria due to P. falciparum, P. malariae, P. ovale, and P. vivax. Hydroxychloroquine HCQ, sold under the brand name Plaquenil among others, is a medication used for the prevention and treatment of certain types of malaria. Specifically it is used for chloroquine-sensitive malaria. Other uses include treatment of rheumatoid arthritis, lupus, and porphyria cutanea tarda. It is taken by mouth. Lupus Erythematosus. PLAQUENIL is indicated for the treatment of chronic discoid lupus erythematosus and systemic lupus erythematosus in adults. Rheumatoid Arthritis. PLAQUENIL is indicated for the treatment of acute and chronic rheumatoid arthritis in adults. CONTRAINDICATIONS 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. Plaquenil lupus mechanism Treating Lupus with Anti-Malarial Drugs Johns Hopkins., Hydroxychloroquine - Wikipedia Side effects of hydroxychloroquine weight gainCelebrex and plaquenilChloroquine for cancer The mechanism of action is thought to be anti-inflammatory, but Plaquenil also seems to reduce sensitivity to sunlight. It has also been noted recently that smoking reduces the effectiveness of Plaquenil in treating lupus, thus, smoking cessation should be instituted in all patients taking Plaquenil. Plaquenil Use in Autoimmune Diseases. PLAQUENIL hydroxychloroquine sulfate Label. Hydroxychloroquine Side Effects, Dosage, Uses, and More. May 07, 2019 Plaquenil hydroxychloroquine is commonly used to help keep mild lupus-related problems, such as skin and joint disease, under control. This drug is also effective at preventing lupus flares. Mechanism Hydroxychloroquine is thought to improve symptoms of systemic diseases by preventing inflammation. For example, to treat both rheumatoid arthritis and systemic lupus erythematosus SLE, it has been hypothesized that the drug suppresses T-lymphocytes by increasing the pH inside lysosomes, which disables leukocyte chemotaxis. This prevents leukocytes from being activated which decrease the inflammation seen in many systemic diseases. Chloroquine and hydroxychloroquine increase pH within intracellular vacuoles and alter processes such as protein degradation by acidic hydrolases in the lysosome, assembly of macromolecules in the endosomes, and posttranslation modification of proteins in the Golgi apparatus.