Not very happy with that episode. Felt rushed and just not very well thought out. Too many ideas and none felt well fleshed out when it was all over. The Shrooms/Placebo thing seemed like a stretch...and Mulder's stoned sequence was so cliched and just plainly bad.
Here's an article that better describes all the things wrong with that episode.
http://www.tv.com/shows/the-xfiles/c...-145558198071/