Actually, I corresponded with my primary care doc via a patient portal about this symptom and he just prescribed Flonase for me (I know it’s OTC but it was just to get me started I guess). He told me to just use it daily. It’s a good thing I did correspond with him. I mentioned that I also currently take a Claratin daily and wondered if maybe Claratin-D might resolve the problem. He informed me that pseudoephedrine (Claratin-D) can cause, or worsen urine retention in guys with BPH (which I’m also in treatment for).