Its predecessor, aminopterin was introduced in 1948 as a cancer treatment. By the early 1950’s small studies of aminopterin in patients with rheumatoid arthritis (RA), psoriasis and psoriatic arthritis demonstrated efficacy but the drug was slow to capture the interest of rheumatologists, perhaps because of the landmark discovery of cortisone, also in 1948, one of the first “miracle drugs.”In 1962 methotrexate, a modified version of aminopterin, was introduced. Plaquenil and allergy medications Is there a natural drug substitute for plaquenil However, dose is usually not more than 800 mg for the first dose and not more than 400 mg for the next doses. For treatment of arthritis Adults—At first, 400 to 600 milligrams mg taken as a single dose or in two divided doses once a day. Then, 200 to 400 mg taken as a single dose or in two divided doses once a day. Plaquenil Hydroxychloroquine is used to treat and prevent malaria infection, and to reduce symptoms and progression of autoimmune diseases such as lupus & others. I usually start with a low dose of 100-200 mg per day to help the patient adapt to the medicine and allow an increase in dose later to as high as 300-400 mg per day. Less common adverse effects of Plaquenil are drug-induced skin rashes. These rashes may consist of many small red bumps or bright red skin covering most of the body. Small, successful clinical trials of methotrexate for RA, psoriasis and psoriatic arthritis followed its introduction and the case for its use in these disorders slowly built. Both inhibited the enzyme folic acid reductase, but methotrexate was easier to produce, making it easier to meet the growing demand for its use in cancer treatment. Hydroxychloroquine dosing for sjogrens RA and Hydroxychloroquine How Effective is it for., Plaquenil Hydroxychloroquine - Side Effects, Dosage. Plaquenil malaria preventionHypnozoites malaria chloroquineChloroquine still effective for malaria prophylaxisVisual field plaquenil Hydroxychloroquine may cause some people to be agitated, irritable, or display other abnormal behaviors. It may also cause some people to have suicidal thoughts and tendencies, or to become more depressed. If you or your caregiver notice any of these side effects, tell your doctor right away. This medicine may cause hypoglycemia low blood sugar. Hydroxychloroquine Oral Route Precautions - Mayo Clinic. Plaquenil Use in Autoimmune Diseases. Hydroxychloroquine Plaquenil Side Effects & Dosage for Malaria. Medscape - Indication-specific dosing for Plaquenil hydroxychloroquine sulfate, frequency-based adverse effects, comprehensive interactions, contraindications, pregnancy & lactation schedules, and cost information. Apr 10, 2019 Plaquenil is sometimes given only once per week. Choose the same day each week to take this medicine if you are on a weekly dosing schedule. Take Plaquenil with a meal or a glass of milk. To prevent malaria Start taking Plaquenil 2 weeks before entering an area where malaria is common. Continue taking the medicine regularly during your stay. 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.