Alprostadil
"I've had ED for many years due to stressful marriage and hypertension, Cialis and other oral meds didn't do much for me and didn't last very long.  Divorced  wife and consulted urologist, he suggested Alprostadil 20 micrograms.  20 was too strong as erection lasted over 4 hours, he cut back dosage to 10 micrograms and I get erection which lasts about 2 hours, perfect for terrific sex with my girlfriend.  I'm 75 and girl friend is 72, neither of us have ever had such a perfect intimate relationship.  She massages my penis after the injection which increases our bonding. I was afraid to inject my penis at first but after a couple of times the anxiety went away.  Wish it wasn't so expensive, would like to use more often."