Things to check. Klonopin and celexa are the same class of drug. Do they act synergistically? Does vistaril act synergistically with celexa? You should check out interactions with your pharmacist to find out what effect they will have on you.
All of these drugs are problematical and have side effects. The big question is whether you are better off with them, or without them. If they are helping you, then the question is what the lowest dosage is that achieves the result you need. You may want to discuss this with your doctor.