I only used the antidote once when I was at 4 hours still rock hard. That's when I used .15 ml from a fresh bottle which turned out to be an overdose for me. Otherwise you want to minimize the number of injections you give yourself to prevent scar tissue. The big fear with these shots is that if you give yourself a ton of them with poor technique and do enough damage to the tissue you can give yourself peyronie's disease. So if I were you and I were not pushing the limits of erection duration, just let it deflate naturally.I got rid of the auto injector! This stuff is great. I think I have my dose correct. Does anyone use the antidote? There’s really no pain with the needle obviously so I use it to my knowledge is no ill affects from using it.