P Phos Primaquine Phosphate Chloroquine
ModeratePrimaquine slows down the liver's work of breaking down some medicines. It has been reported to slow the breakdown of chloroquine in particular, so chloroquine may be cleared from your body more slowly when you take the two together.
These medicines are often taken together with some care. Your doctor may change a dose, space them apart or check on you more often. Make sure your doctor and pharmacist know you take both.