... melatonin approximately 4-6 hours before I am supposed to sleep. I am thinking of adding 25-50 mg of benadryl at night to help myself be able to sleep. I've read on a few sites to use caution when taking the klonopin and benadryl together, but I feel like I am at the end of a rope and can't seem to get help from my psychiatrist other than sleep hygiene. Has anyone else taken benadryl and klonopin together? Or can anyone recommend a medicine that is safe enough I can talk to my Dr about taking with the klonopin?