I received a pm from a gentleman asking how my experiments with different doses of the ED meds went. Here is how I answered in case any of you are considering something similar.
Hey _____, happy to give you my thoughts. In case I didn't mention it in my first post, I don't really have any ED issues but was trying to go for multiple rounds. My first experiments were to split a 100mg "generic" viagra for a 50mg dose. I borrowed these from a friend who got them online from India. They worked well with no side effects. I was able to achieve multiple erections over 6 hours. The 2nd and 3rd orgasms took longer to achieve but that's not all bad. I have not really tried for three in recent outings even if I can... it can be taxing on my other muscles though I'm in pretty good shape.
About 2 months ago I went to a urologist, told a little white lie, and he prescribed Revatio which is the same active ingredient in viagra. They come in 20mg pills. I have achieved solid, multiple erections at the 20mg dose but tend to take 2 for a 40mg dose. Seems to work as well as the 50mg of the generic viagra. The Revatio was very inexpensive. $64 for a bottle, 90 pills, so $1.40 per pill, for me, less than $3 per multiple erections if desired.
I have no scientific basis for this opinion but I would recommend finding a good local urologist and tell the "little white lie" of having ED to see if he will prescribe the Revatio. I'd also recommend starting with the lowest dose that works.
(Added note) For those worried about the significant other finding the Revatio, its primary, labeled used is a blood pressure medicine, which is how Viagra was discovered. Good luck and happy hunting.
I bet shadowcat supports your experiments. He gets excited at boners and Ron Jeremys magnificent man boobs