Chloroquine (also known as Chloroquine phosphate) is an antimalarial medicine. It is available in the United States by prescription only. It is sold under the brand name Aralen, and it is also sold as a generic medicine. It is available in tablets of two sizes: 150mg base (250mg salt) and 300mg base (500mg salt). It is just two different ways of describing the same thing. Chloroquine can be prescribed for either prevention or treatment of malaria.
