Pyrimethamine

Pyrimethamine is an antifolate drug used to treat and prevent parasitic diseases caused by protozoans, such as malaria and toxoplasmosis. It acts by blocking an enzyme involved in the production of folate, a B vitamin required for the growth and reproduction of the parasites. Pyrimethamine is an important drug in the world of medicine, as it helps treat and prevent a number of serious and potentially deadly diseases. Its use has been particularly impactful in the developing world, where diseases caused by protozoans are more prevalent.