I was on klonopin (clonoazepam) for 14 years. I took 1mg three times a day as needed for anxiety. I usually took my last dose an hour before bed because I have OCD and not taking it would mean 7-9 hours spent checking the doors to be sure they were locked and the alarm to be sure that it was properly set.

I never noticed any nightmares, but I was also on Ambien and Elavil to help sleep.

I hope it helps you.