Considering how much of an acid trip IT turns into in certain parts, I can kinda buy him being on drugs when he wrote certain scenes.
The scene with all the male members of the losers club running a train on the only female member, was written in far too much of a mechanical way to sound like someone who was on drugs, though. It read like a guy who knew what he was writing the entire time, but wanted to get it over with as fast as possible.
Why King didn't just, I don't know, decide to write a different scene that demonstrated them 'maturing', instead of that shit, I have no idea.

ha