I have no experience with these, however I have one friend that has used Viagra and Cialis. Both have their side effects, but he favors Cialis. You can buy either in pharmacies around TJ, and I would recommend that you take it right away, so you would not be carrying it around and get jammed up by the police.
I am no doctor, but would recommend you visit with a doctor before trying any ED medication. There have been several mongers die in the hotels in the last couple of years, and although I don't know what led to their deaths, many folks suggest tht ED meds contributed to the deaths.
I have one aquaintance that is paralyzed after a stoke. He used Viagra, and lots of folks think that contributed. Again I don't have any medical information, and only repeating rumors for the most part.