Affiliate Marketing Secrets

NOTE TO YAHOO: This is a legit question, I am worried about my friend, so please do not take this down.
My friend just got hired to be in adult films. I guess he is what they were looking for, he just met the minimum requirements and then they had him sign. The fact is, they said that many male performers use pills to keep their ***** erect during the film and make it grow longer. They said that he should consider enhancement, he did, and now they have him taking some kind of pills (I don’t know if they are prescription or natural), but he claims they are working. What is in these pills is my question? I am really worried for him (btw, I posted this on another message board for adult films, and no, he is not my lover…lol).
Is there anything that is dangerous in these pills (whether natural or prescription?). Seems like some kind of bizarre boost of a strong steroid to me. Any affiliated with the industry know about this stuff?