ED exilir and other physical cures have long been applied in Chinese, African and other civilizations. But unlike medicine medicines for erect pathology, much as sildenafil (sildenafil ), vardenafil (Levitra, Staxyn ), tadalafil (Cialis) and avanafil (Stendra ), erectile dysfunction herbs and supplements haven't been well-studied or tested. Some may have side effects or move with different medications. And the quantity of the active component may vary greatly from quantity to product.