I don't know if this is the right place for this.

My fiance has been having trouble getting to sleep since we quit drinking 59 days ago. After getting sick of always being tired [and sometimes cranky] he broke down and purchased a sleeping agent from Unisom for the first time. He took the recommended doseage, fell asleep and woke up with one word repeating over and over and over inside of his head "suiciiiide. suiciiiiiiide"
It freaked him out as he has never been suicidal, is not depressed and has never experienced anything like this before. It was as if an evil spirit was inside of him convincing him to kill himself.

Thoughts, please?