PGE-1 and you are essentially only getting 1 part of the what is known as, "trimix" for erectile assistance. I've tried this once at a male clinic and blacked out, fell to the floor and hit my head. The clinic had to call 911. No joke. They came in with a caverjet and shot this shit into my penis and it must have went right into my blood stream. Within minutes, I felt dizzy, then puked, light headed, stood up and collapsed. My BP dropped to almost nothing. Almost killed me. Doctor said it must have went directly into a vein. The amazing part? After this little twenty minute episode, my dick had a full on rock hard erection.
I am actually tempted to try it again, but there is an outside chance I just do not react well and it was not a vein I hit. The male clinic would not allow me to try again.