Hi Boy, The reason behind the 4 hour mark is because once your blood goes in, it just sits there, that's why they say an erection longer than 4 hours get to your ER, a 12 hour erection would be very dangerous to have, its a big problem area that you should not even think about, I think you find that guys practising tantric sex there erections come of a bit then gets new blood pumped back in back to full erection.
Try cutting back on the amount your injecting, see if you get shorter erections?
Try cutting back on the amount your injecting, see if you get shorter erections?
This is from
http://intracavernosalinjectioninfo.wor ... om/bi-mix/Some side effects from injecting the penis may include bruising on the penis, bleeding from the injection site, a prolonged erection (priapism - erections lasting longer than 4 hours), and the development of fibrous tissue at the injection site, but these are not common. Men should alternate sides when doing the injections to minimize side effects. Applying pressure to both sides of the penis after the injection for at least three minutes is important to prevent bruising. The risk of infection is very low, especially if you are diligent about using an alcohol swab. The possibility of scarring the erection tissue or the tunica, known as Peyronie’s disease, is extremely low when the injections are used properly.
The possibility of priapism is a serious but not common side effect. Men can prevent priapism by adhering to the dose prescribed by their healthcare provider and not increasing the dose on their own because they are not pleased with the quality of their erection. Any increases in dosing should be discussed with a physician before they are attempted. Priapism is a serious medical condition, because the penis is deprived of oxygen, which damages and destroys erectile tissue.
So just try cutting back the dose.
Good Luck
NOWHARD