What kind of acne medication should I try for mild acne? About how much will this cost?

I have a few big zits here and there, a lot of blackheads on my forehead, on my nose, and a few on my chin, plus my skin gets really red. My friend recently got acne medication and it’s helped her skin so much, she hardly has any pimples at all. However, I’m worried about his cost. About how much would an acne med. cost that would cure the things I listed above?