You are in a good situation by knowing upfront and this is the best situation as the best anyone can do is be completely upfront and honest. If you choose not to because of psz, you would be left wondering and if you do, you just might find happiness.
Why not talk to him more and try to get to know him personally... if you hit it off, the psz might not even be noticeable to you, especially if he is on meds..... good luck!