Although not all of these side effects may occur, if they do occur they may need medical attention. Check with your doctor immediately if any of the following side effects occur while taking chloroquine: Incidence not known Some side effects of chloroquine may occur that usually do not need medical attention. Does plaquenil help with ms Does hydroxychloroquine lower bad cholesterol Chloroquine Phosphate. Chloroquine is used to prevent or treat malaria caused by mosquito bites in countries where malaria is common. Malaria parasites can enter the body through these mosquito bites, and then live in body tissues such as red blood cells or the liver. Usual Adult Dose for Malaria Prophylaxis. 500 mg chloroquine phosphate 300 mg base orally on the same day each week Comments -If possible, suppressive therapy should start 2 weeks prior to exposure; if unable to start 2 weeks before exposure, an initial loading dose of 1 g chloroquine phosphate. Feb 17, 2015 In most cases, 250 mg tablets have an equivalence of 150 mg chloroquine base, and 500 mg tablets have an equivalence of 300 mg chloroquine base. Although the purity mentioned above is generally accurate, it would be best to verify the chloroquine base contained in the tablets of your choice in order to be able to properly calculate the exact. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. These side effects may go away during treatment as your body adjusts to the medicine. Chloroquine phosphate degradation CHLOROQUINE PHOSPHATE, USP, Chloroquine Dosage Guide with Precautions - Symptoms of hydroxychloroquine toxicity In India, the dramatic rise in Pf is due to resistance to Chloroquine, but the decline in Pv is also due to Chloroquine. There are some reports of Chloroquine resistance in N. E. India. Questions with answers in CHLOROQUINE Science topic. Chloroquine phosphate Page 50 REEF2REEF Saltwater and.. Chloroquine Side Effects Common, Severe, Long Term.. Chloroquine phosphate may cause an upset stomach. Take chloroquine phosphate with food. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Use chloroquine phosphate exactly as directed. Do not use more or less of it or use it more often than prescribed by your doctor. Chloroquine is a 4-aminoquinoline with antimalarial, anti-inflammatory, and potential chemosensitization and radiosensitization activities. Although the mechanism is not well understood, chloroquine is shown to inhibit the parasitic enzyme heme polymerase that converts the toxic heme into non-toxic hemazoin, thereby resulting in the accumulation of toxic heme within the parasite. Chloroquine Phosphate, USP, is a 4aminoquinoline compound for oral administration. It is a white, odorless, bitter tasting, crystalline substance, freely soluble in water. Chloroquine Phosphate Tablets are an antimalarial and amebicidal drug. Each tablet, for oral administration, contains 250 mg chloroquine phosphate equivalent to 150 mg.