Malaria is common in areas such as Africa, South America, and Southern Asia. This medicine is not effective against all strains of malaria. What category is plaquenil Plaquenil retinal toxicity treatment Chloroquine half life mouse Daily dose greater than 400 mg or, in people of short stature, a daily dosage over 6.5 mg/kg ideal body weight or total cumulative dose of more than 1,000 g medication use longer than five years concomitant renal or liver disease because the drug is cleared by both routes How to use Plaquenil. Hydroxychloroquine is usually taken with food or milk to prevent stomach upset. The dosage and length of treatment are based on your medical condition and response to therapy. In children, dosage is also based on weight. Following a single 200 mg oral dose of PLAQUENIL to healthy males, the mean peak blood concentration of hydroxychloroquine was 129.6 ng/mL, reached in 3.26 hours with a half-life of 537 hours 22.4 days. 50.3 ng/mL reached in 3.74 hours with a half-life of 2963 hours 123.5 days. Taking hydroxychloroquine long-term or at high doses may cause irreversible damage to the retina of your eye. Hydroxychloroquine is also an antirheumatic medicine and is used to treat symptoms of rheumatoid arthritis and discoid or systemic lupus erythematosus. Plaquenil first dose Protecting your eyesight when taking Plaquenil Lupus., Plaquenil Oral Uses, Side Effects, Interactions. Plaquenil sulfa Mg 310 mg base to 600 mg 465 mg base PO daily, administered as a single daily dose or in 2 divided doses. Do not exceed 600 mg/day 465 mg base/day or 6.5 mg/kg/day 5 mg base/kg/day, whichever is lower. Side effects may require a temporary initial dose reduction. Plaquenil hydroxychloroquine sulfate dose, indications.. PLAQUENIL HYDROXYCHLOROQUINE SULFATE TABLETS, USP DESCRIPTION. Taking Plaquenil for Rheumatoid Arthritis. For Rheumatoid Arthritis hydroxychloroquine is a good drug for mild arthritis however length of time it takes for drug to leave body is worrying when you are faced with loosing your sight and possible progression after you stopped taking the drug. Also check the dose is correct for your ideal weight do you are not over medicated. Irreversible retinal damage observed in some patients who had received hydroxychloroquine sulfate; significant risk factors for retinal damage include daily doses of hydroxychloroquine sulfate greater than 6.5 mg/kg 5 mg/kg base of actual body weight, durations of use greater than five years, subnormal glomerular filtration, use of some concomitant drug products such as tamoxifen citrate and concurrent macular disease Plaquenil comes in 200 mg tablets, and many doctors just off-handedly put everyone on 200 mg twice a day.