Don't suffer through sleeplessness because of my weird story. I can't even find that warning anymore although hallucinations are a possible rare side effect (but are on so many meds too). I didn't want to scare you off, just let you know it is possible. I've never heard of phenergan being used for sleep. I don't know why not but usually they use hydroxyzine (atarax/vistaril) first or drugs like gabapentin.