Sildenafil is the active ingredient in Viagra. Viagra is a brand 비아그라 구입 name for 비아그라 구매 방법 a medication that contains sildenafil.
So, the main difference is that sildenafil is the generic name for 비아그라 구입 the drug, while Viagra is a specific brand 비아그라 부작용 of the drug.
