My family doctor, who is also a close friend of mine, prescribed me my nolvadex for my current (and first) cycle. He asked me how much I paid for everything I had bought and as the conversation progressed, he offered to just prescribe me the nolva for now on to save a little money. He also offered to give me my injections, which took a bit off my mind when I decided to begin using them.
Other than that, he really doesn't know one thing from another about steroids, other than the terms, like HGH Man pointed out.
He simply just takes my word for everything, which all I know I've learned from searching and reading here on a regular basis.
To answer the original poster's question, I don't believe he'd of known about about post cycle therapy had I not discussed it with him.
cydex01