How advisable is to take 5 drops of clonazepam an zzzquil an hour apart?

They are sedating: These medications are both sedating. You don't say exactly how much is you are taking nor do you state how much Klonopin you are taking. Assuming you take the standard dose of 50 mg of Benadryl (diphenhydramine) and the dose of Klonopin is likely way under 2 mg, i don't expect that you will have any problem other than combined sedation. Just be prepared that you may be sedated when you get up in the morning and don't drive until you feel like you are wide-awake.

?? drops: I am not aware of a form of liquid clonazepam, so I do not know its concentration, if from outside of the us. As a result it is difficukt to advise. Sedatives combined is generally very risky. Please talk with your doctor before doing them within at least 4 hour difference!

SLEEP: Much better to learn how to go to sleep or get help for whatever is keeping you awake. Tell dr who prescribed Clonazepam what youre doing & ask for referral to a therapist.