Plaquenil is used to treat or prevent malaria, a disease caused by parasites that enter the body through the bite of a mosquito. Malaria is common in areas such as Africa, South America, and Southern Asia. Plaquenil cause weight gain Chloroquine drug 13000 Hydroxychloroquine is commonly used alongside other disease-modifying drugs including methotrexate – especially for rheumatoid arthritis. However, some drugs can interact with hydroxychloroquine. Indigestion remedies for example, antacids including some over-the-counter preparations can stop hydroxychloroquine being absorbed. Given at a low dose, methotrexate is effective in controlling the swelling, pain, and stiffness that result from inflammation. In a significant percentage of patients, it also seems to slow the progression of rheumatoid arthritis and prevent damage to joints and related structures. 2,3. This medication comes in both pill and injectable forms. Feb 19, 2020 Rheumatoid Arthritis. The action of hydroxychloroquine is cumulative and may require weeks to months to achieve the maximum therapeutic effect see CLINICAL PHARMACOLOGY. Initial adult dosage 400 mg to 600 mg 310 to 465 mg base daily, administered as a single daily dose or in two divided doses. Plaquenil is also an antirheumatic medicine and is used to treat symptoms of rheumatoid arthritis and discoid or systemic lupus erythematosus. This medicine is not effective against all strains of malaria. Dosage of plaquenil for rheumatoid arthritis Taking Plaquenil for Rheumatoid Arthritis, RA And Methotrexate Phototoxic reaction to plaquenilChloroquine eye toxicity Dosage for rheumatoid arthritis Adult dosage ages 18 years and older Typical starting dosage 400–600 mg per day, given as a single daily dose or in two 2 divided doses. Hydroxychloroquine Side Effects, Dosage, Uses, and More. Plaquenil Hydroxychloroquine Uses, Dosage, Side Effects.. Canada Plaquenil - Canadian Drugs for Rheumatoid Arthritis.. Hydroxychloroquine Plaquenil is considered a disease-modifying anti-rheumatic drug DMARD. It can decrease the pain and swelling of arthritis. It may prevent joint damage and reduce the risk of long-term disability. Hydroxychloroquine is in a class of medications that was first used to prevent and treat malaria. Feb 19, 2020 The adult dose of Plaquenil to treat an acute attack of malaria is an initial dose of 800 mg followed by 400 mg in six to eight hours and 400 mg for two more days. To treat lupus erythematosus, the average adult dose is 400 mg once or twice daily. Hydroxychloroquine is one of several drugs being tested by the FDA as a possible treatment for COVID-19 It is a drug first approved by the FDA over 50 years ago as a treatment for malaria and.