Fair call. So much of this stuff is simplified for us laypeople, but yeah - when you look up what so-and-so molecule does and find out how many different binding sites it interacts with as an agonist/antagonist/catlyst (and sometimes they've only measured interactions in rats) you realise there's a heck of a lot of stuff going on.

I also got slightly weirded out when I found out something I was taking interacted with the mu-opiod receptors even though it wasn't an opiate.