Yes, and it swells my prostate too. If I'm not mistaken, the way it promotes stimulatory effects is partially through constriction of blood vessels. Sexual drive doesn't really become the issue, just the circulation to the unit. It's a possible side-effect of nearly any amphetamine or amphetamine-like substance. Just like some people are horny as hell on Ecstasy, but can't perform, this is the same type of problem Viagra was created to address. Yohimbine is also a strong stimulate, but works through a different mechanism that actually promotes increased circulation in the unit.