What are the differences between sildenafil and Viagra?

Description

Sildenafil is the active ingredient in Viagra.
Viagra is a brand 비아그라 구매 – https://blue-tab.com/side-effects name for 비아그라 구입 – https://blue-tab.com/ed-discussion the medication containing sildenafil – https://slashdot.org/index2.pl?fhfilter=sildenafil. Both are used to treat erectile dysfunction, 비아그라 구입처 – https://blue-tab.com/viagra-long-term-use-safety but sildenafil is the generic version while Viagra is the brand 비아그라 효과 – https://blue-tab.com/viagra-100mg-guide name version.