This medicine is also sometimes given off-label to help the following conditions: Also, let your doctor know if you drink large amounts of alcohol before starting on this medicine. Your doctor will probably want to order frequent tests to check your body's response to chloroquine. Maqular degeneration plaquenil What is the shelf life of chloroquine phosphate Available forms Available by prescription only chloroquine hydrochloride Injection 50 mg/ml 40 mg/ml base chloroquine phosphate Tablets 250 mg 150-mg base; 500 mg 300-mg base Indications and dosages Suppressive prophylaxis. Adults 500 mg 300-mg base P. O. on same day once weekly beginning 2 weeks before exposure. View all Manufacturers & Suppliers of Chloroquine Phosphate Licensing, Dossiers Finished Dosage Formulations listed on Chloroquine is the generic form of the brand-name prescription medicine Aralen, which is used to prevent and treat malaria — a mosquito-borne disease caused by a parasite — and to treat amebiasis, an infection of the intestines caused by a parasite. Let your healthcare provider know if your symptoms either don't improve or worsen while taking this medicine. Keep all appointments with your doctor and laboratory. Chloroquine dosage forms CHLOROQUINE sulfate or phosphate oral - Essential drugs, Chloroquine Phosphate Dossiers Finished Dosage Forms. Estradiol plaquenil combinationPlaquenil maculopathy mechanismsRheumatoid arthritis guidelines hydroxychloroquine Chloroquine is a medication used to prevent and to treat malaria in areas where malaria is known to be sensitive to its effects. Certain types of malaria, resistant strains, and complicated cases typically require different or additional medication. Occasionally it is used for amebiasis that is occurring outside the intestines, rheumatoid arthritis, and lupus erythematosus. Chloroquine - Wikipedia. Chloroquine Aralen - Side Effects, Dosage, Interactions.. Chloroquine Oral, Intramuscular Advanced Patient. -. The dose of chloroquine is often expressed or calculated as the base each 500 mg tablet of chloroquine phosphate is equivalent to 300 mg chloroquine base. -The pediatric dose should never exceed the adult dose. In one study, serum concentrations of chloroquine appeared to decline in a biphasic manner and the serum half-life of the terminal phase increased with higher dosage of the drug. In this study, the terminal half-life of chloroquine was 3.1 hr after a single 250 mg oral dose, 42.9 hr after a single 500 mg oral dose. Chloroquine, brand name Aralen, is an anti-malarial drug. It is similar to hydroxychloroquine Plaquenil, and is useful in treating several forms of malaria as well as amebiasis that has spread outside of the intestines.