Typical dosage for Pyrimethamine
The typical starting dose for adults is 50 mg to 75 mg by mouth per day for 1 to 3 weeks. After 3 weeks, the dose will be lowered by 50% and continued for another 4 to 5 weeks. This medication must be taken together with a sulfonamide medication (e.g., sulfadiazine) and leucovorin.


