The major problem with the pills are headache, and feeling bad for 6 to 8 hours after taking the pill. It is was explained to me that ed pills were orignally developed to lower blood pressurer and a side effect was that it helped men get an erection. The pill works fine for those men who have high blood pressure. But for those who don't and have normal blood pressure it can be painful. I have a stent in my heart now and it works just fine. It makes more sense that a stent for the penis may be the best thing and actually be better than the pill.