No, not longer, just much much harder. Also helps with the rebound for the next round.
Trick is to take just enough to get the effect without seeing blue or getting a headache.
You gotta love the warnings with the commercials
"If erection lasts more than 4 hours, please call your doctor".
Sounds more like the ad campaign itself. I would think you would be better to call a WG.
Che'lu