Yohimbé bark

Yohimbe is a natural beta blocker, an agent that paralyzes the sympathetic system, and in high doses produces vasodilation of the cavernous body.
Yohimbe reveals vasodilator effects at the peripheral level and vasodilator at the level of the sexual organs. It is an aphrodisiac and diuretic plant which acts on male and female sexual function and dysfunction. It also helps treat orthostatic hypotension.
The bark of yohimbine has stimulating properties that prevent sleep