I noticed it happening gradually. So, I think I was a little bugged out when I heard Meth and them allude to acid and even coke early on, but no rappers were really wanting to go that route for the most part, unless it was incidentally, in order to prove how loose and crazy they were on a song or two. IE: Big with "the crack smoke make my brain feel so strange," etc. Or, sometimes, people would cop to having used in the past and then realized it was wack or whatever like Rae with the woolies on C.R.E.A.M.
Then, around '97, '98 when E started popping mainstream in Hip-Hop, people started getting on that. "Some say the Ex makes the sex, incredible" "I just took some ecstacy, aint no tellin what the side effects could be," etc. That was aound when there was an artticle in the Source citing Nas and other people's references to rolling off E pills... some of you may rememember that. Truth is, heads were already doing it, but it wasn't really ON like that, or in they just didn't wanna admit it, like heads here already said. Cus, like, with E for example, that shlt had BEEN popping in the raves and everywhere else way before rappers got on that.
Then you got the element of white rappers like Em and Lil Wyte who pretty much pioneered the admission on track of doing hard drugs. Even though, while a lot of these dudes do REALLY get down, truth be told Em was kinda bullshlttlng, cus he later admitted he didn'e ever do coke, and that his pill problem only got bad later on. In other words, it started like a gimmic and ended up with "life imitating art."
Now around that same time, here comes the down South and Texas dudes with the syrup shlt, and Weezy basically took that and blew it up after a few years. Kinda opened the flood gates and made it OK. Once people started to figure out the same exact active ingredients were in pill form, that was OK too. It's pretty much been history from there, but coke and heroin are still kinda taboo it seems like. Even though way more people die from combo prescription abuse than both of those combined, it's not really logic at work here, it's what people feel is viewed as OK.
Weird.