Whats the name of this movie?

Hey guys, my friend sent me a movie trailer a while back and i was always meaning to go watch the film but i never got time to actually sit myself down and watch the damn thing and now i've forgetten what the movie was called.. i searched the web but i cant find it based on my "keywords" anywaysss the movie sort of went like this (from the trailer i was watching)

It was two business men that rock up to some hippie dudes house (the dealer) this hippie dude has sold these two business dudes pot and they've come back to buy some more of this "wonderful stuff" but the hippie guy go on a rant about the awesome stuff that hes got and they must try, it turns out to be lsd and they drop it in his apartment and trip balls etc.. some things go down in between but i cant really remember. I think when they are on come down they go to a cafe and this chick on roller blade skate things serves the two business men and she notices they are frying and shes like its obvious that you two have a good time or something along those lines and she mention their pupils being the size of saucers.

anyway i dont know how good of a description that was but please please help i really wanted to watch the movie! thanks in advance guys, peace :sunny: