Do not take more of it, do not take it more often, and do not take it for a longer time than your doctor ordered. To do so may increase the chance of serious side effects. Plaquenil and skin rashes Hydroxychloroquine sulfate for skin What companies makes safest hydroxychloroquine Plaquenil and low dose naltrexone Chloroquine Phosphate. Uses. Chloroquine is used to prevent or treat malaria caused by mosquito bites in countries where malaria is common. Malaria parasites can enter. Side Effects. Precautions. Interactions. Jul 30, 2019 Some side effects of chloroquine may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Some side effects of chloroquine may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. If you already have malaria, you should still keep taking this medicine for the full time of treatment even if you begin to feel better after a few days. If you stop taking this medicine too soon, your symptoms may return. If you are taking this medicine to help keep you from getting malaria, keep taking it for the full time of treatment. Chloroquine phosphate 500 mg side effects What is Chloroquine Phosphate? - GoodRx, Chloroquine Side Effects Common, Severe, Long Term - Hydroxychloroquine sulfate brand namePlaquenil side effects antimalarialHydroxychloroquine sulphate over the counterPlaquenil lupus en espanolCan hydroxychloroquine cause weight gain hair loss Disclaimer The Harmonized System HS code provided on this webpage are for information purposes only and are subject to change without notice. Chloroquine Phosphate 500 mg. Chloroquine Side Effects Common, Severe, Long Term.. Side Effects of Aralen Chloroquine, Warnings, Uses. Adults—At first, 1000 milligrams mg once a day. Then, 500 mg 6 to 8 hours after the first dose, and 500 mg on the second and third days of treatment. Adults with low body weight and children—Dose is based on body weight and must be determined by your doctor. At first, 10 milligram mg per kilogram kg of body weight. Each tablet contains 500 mg of chloroquine phosphate USP, equivalent to 300 mg chloroquine base. Inactive Ingredients colloidal silicon dioxide, dibasic calcium phosphate, hydroxypropylmethylcellulose, magnesium stearate, microcrystalline cellulose, polyethylene glycol, polysorbate80, pregelatinized starch, sodium starch glycolate and titanium dioxide. Initial dose, use 1 gram of chloroquine phosphate 600 mg base taken 1 time / week on the same day each week. Maintenance dose 500 mg of chloroquine phosphate 300 mg base taken after 6-8 hours, then 500 mg of chloroquine phosphate 300 mg base taken 1 time / day for 2 consecutive days.