Help please? what is a good herbal remedy for erectile dysfunction?

Yohimbe vs Yohimbine: Yohimbe is the African tree bark used as a dietary supplement for many conditions such as erectile dysfunction. However, in the States, dietary supplements are not manufactured under FDA supervision, unlike its derivative, yohimbine, which is the prescription drug form, which implies quality control. However, PDE-5 inhibitors like Cialis, Levitra, (vardenafil) Staxyn & Viagra are much more effective.