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. Does plaquenil cause skin cancer Hydroxychloroquine sulfate tab 200 mg Plaquenil side effect skin 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. I accidentally have taken 2-3 extra doses of my thyroid medication the last few days. Should I skip a day take a dose and skip another day? I'm in the process of cutting down the dosage due to surgery 18 month ago. I have gone from 175 to 112 and it still needs to go lower as I'm way over medicated. This how I messed up. However, in general terms, taking 400 mg of hydroxychloroquine is within a safe range for most people. In fact, for some people, this will be the dose they are prescribed. Jeff Donovan MD PhD FRCPC FAAD US & Canadian board-certified Dermatologist Toronto, Canada 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. Accidental double dose of plaquenil PLAQUENIL®, Accidentally took too much Levthroxinegeneric synthroid? Plaquenil visual field codingRx hydroxychloroquine Missed Dose. If you miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose. Take your next dose at the regular time. Do not double the dose to. Plaquenil Oral Uses, Side Effects, Interactions, Pictures.. I accidentally took two 200mg tabs of hydroxychloroquine.. A case of fatal hydroxychloroquine overdose. Plaquenil Dosage & Precautions Before taking hydroxychloroquine, tell your doctor or pharmacist if you are allergic to it; or to other aminoquinolines e.g. chloroquine; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details. Effects of a Malarone Overdose. The effects of an overdose are expected to be the same as the normal Malarone side effects, but may be more severe. In addition, an overdose with Malarone has been reported to cause the following symptoms High fever, aches, and pains, which may be signs of an infection. Hydroxychloroquine sulfate is a colorless crystalline solid, soluble in water to at least 20 percent; chemically the drug is 2-4-7-Chloro-4-quinolylaminopentylethylamino ethanol sulfate 11. PLAQUENIL hydroxychloroquine sulfate tablets contain 200 mg hydroxychloroquine sulfate, equivalent to 155 mg base, and are for oral administration.