It doesn't immediately bring to mind anyone he knows, but he'll definitely be on the lookout.

"All right. Thank you," says Simon. "I'm going to take a look at what he gave you, and if it's what I think it is, I should be able to give you the same thing in pill form. I want you to let me know, though, if you feel any strange effects when it starts to wear off, or afterwards. Can you do that for me?"