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. How long for plaquenil to start working Chloroquine ph 500 mg tablet Jun 13, 2016 A total dose representing 25 mg of base per kg of body weight is administered in three days, as follows First dose 10 mg base per kg but not exceeding a single dose of 620 mg base. Second dose 5 mg base per kg but not exceeding a single dose of 310 mg base 6 hours after first dose. Third dose 5 mg base per kg 18 hours after second dose. However, dose is usually not more than 400 mg once a day. Children—Use and dose must be determined by your doctor. Missed Dose. If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses. Storage Hydroxychloroquine has also been used as therapy of porphyria cutanea tarda where it seems to act by increasing excretion of porphyrins. Hydroxychloroquine is available in generic forms and under the brand names of Plaquenil in tablets of 200 mg. The usual dose is 400 mg daily in one or two divided doses. 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 Hydroxychloroquine Side Effects, Dosage, Uses, and More, Hydroxychloroquine Oral Route Proper Use - Mayo Clinic Plaquenil for gvhd Plaquenil Hydroxychloroquine is used to treat and prevent malaria infection, and to reduce symptoms and progression of autoimmune diseases such as lupus & others. Plaquenil Hydroxychloroquine - Side Effects, Dosage.. Hydroxychloroquine - LiverTox - NCBI Bookshelf. Plaquenil Hydroxychloroquine Uses, Dosage, Side Effects.. Usual Adult Dose for Malaria Prophylaxis. Suppression 400 mg 310 mg base orally on the same day every week Comments-Suppressive therapy should begin 2 weeks prior to exposure; however, failing this, an initial dose of 800 mg 620 mg base may be taken in 2 divided doses 6 hours apart. Levaquin Overdose. The effects of a Levaquin levofloxacin overdose will vary from person to person, depending on the dosage and whether the antibiotic was taken with other drugs or substances. In animal studies, symptoms seen with an overdose included coordination problems, shortness of breath, and droopy eyelids. 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.