There are some herbs and homeopathy therapies that have been claimed to effectively treat ED, but the scientific evidence that they work is thin.
Some natural or alternative treatments for ED can have serious side effects, and because they aren’t on prescription, you won’t go through any health checks before taking them. So in some cases, herbal ED remedies can be dangerous.
For this reason, it’s better to consult with a clinician before taking any kind of treatment for ED, be it prescription, non-prescription or otherwise.