Do herbal remedies for erection work?

Can, less powerful. Various herbs and supplements are sold without prescription to improve erections. Yohimbe is probably the best studied, but has many interactions and can be toxic. Asian ginseng, gingko and l-arginine are generally quite safe and may be effective. Horny goat weed isn't well studied, and can cause side effects. Discuss with someone well trained in herbs, don't just order from back of magazine.