Viagra and TTC?

My husband and I have been trying for close to 5 months and nothing.

I have a history of pcos and irregular periods, been off birth control for 5 months as well. I personally think I will have a hard time getting pregnant.

I wanted to know if anyone has gotten pregnant with their husband taking viagra? My husband is quite a bit older than I am, and he needs a little extra something something to give me a little something something. Hahah does that hurt the chances? Has anyone been in a similar situation and had success?