Instead of adding another medication that may cause another set of side effects, you may consider undergoing
CognitiveMental status tests-Behavioral psychotherapy that can help you manage your anxiety. This way, you may taken off your medications and doing away with the associated side effect.
Another strategy is limiting to a minimum your drinking habits and modifying your diet (consume less food/beverage that promotes urination).
A review of your other medications (if any)should also be done.
I recommend that you discuss this with your psychiatrist.