It's used to treat and prevent malaria infection, and to reduce symptoms and progression of autoimmune diseases such as lupus, rheumatoid arthritis, and others. Malaria is spread by mosquitoes, which transmit the parasites that cause the infection, usually in tropical and subtropical parts of the world. Chloroquine base lethal dose Chloroquine trpa1 itch You take plaquenil twice a day, approximately 12 hours apart. The most common side effect is mild nausea and occasional stomach cramps. You can take it with food if it upsets your stomach. You should also have a complete eye exam before starting this medication and then every 6 months. In very rare cases, plaquenil can affect the eyes. The normal dose of Plaquenil is 1 tablet a day 200mg/day. Some doctors recommend 2 a day 400mg/day but we find that 1 a day suits most people - the dose can always be increased for a flare. One of the attractions of this medication is its long 'half-life' - it stays in the system for days & weeks. To treat lupus, one or two tablets are usually taken once or twice a day. Dosing is usually higher in the first few weeks, then lowered for longer maintenance treatment. For example, it may be combined with an antibiotic to treat chronic Q-fever, which humans usually catch from farm animals or raw milk. Plaquenil is used to treat other types of infections too. Taking plaquenil twice a day Plaquenil & Weight Gain/Loss -, Doc just put me on a med called Hydr. - HealthUnlocked Plaquenil drug usesPlaquenil is os jumction Generally, hydroxychloroquine is given in 200 mg or 400 mg doses, once per day. Higher doses can sometimes be used, but only in adults and not for all cases. Some people tolerate this medication much better than other people, so it is important that individuals who are considering taking hydroxychloroquine talk with their doctor about the lowest necessary dose to reduce or eliminate their symptoms. RA and Hydroxychloroquine How Effective is it for Rheumatoid.. Plaquenil Hydroxychloroquine - Side Effects, Dosage.. Plaquenil Hydroxychloroquine Uses, Dosage, Side Effects.. Jan 08, 2017 I am prescribed plaquenil I take the substitute hydroxychloroquine 200 mg twice a day; I accidentally took an extra dose - -about two hours after the first dose. So all total today - 1 200 mg in the morning; 1 in the evening and 1 about 25 minutes ago - should I be concerned? Thinking I should skip my morning dose. It has become fairly common practice for most rheumatologists to recommend that patients being treated with hydroxychloroquine be seen for formal visual field evaluation once or twice a year to monitor for retinal toxicity. The previous AAO guideline recommended screening every 12 months. Adult dosing ranges from 200 mg or 400 mg per day 6.5mg/kg. In some cases, higher doses can be used. It is recommended one tablet twice daily if taking more than one tablet.