Should I suggest an acne medication to a friend?
Why? Are you trying to help them?
Yeah, he looks like he has bad acne and I feel it is my responsibility to recommend a solution to him
It's not your responsibility, but it can be helpful. He might be insecure about it, so breach the topic gently with him.
I will. I know a great medication that can ease his issues.
It's admirable to want to help a friend, especially if you took this medication for your own acne. It sounds like you are determined to give him this recommendation, just don't hurt his feelings by making it sound like he needs to improve.