Mild to moderate PCP (oral regimens)
First choice	Trimethoprim-sulfamethoxazole (Bactrim, Septra)
Second choice	Trimethoprim (Proloprim) and dapsone
		or
	Clindamycin (Cleocin) and primaquine
Third choice	Atovaquone (Mepron)
Moderate to severe PCP (IV regimens)
First choice	Trimethoprim-sulfamethoxazole
Second choice	Trimetrexate/leucovorin and oral dapsone
		or
	Clindamycin (Cleocin phosphate) and oral primaquine
Third choice	Pentamidine