비아그라에 대한 2분 규칙
Viagra can be a manufacturer-identify Variation in the generic drug sildenafil. It’s a phosphodiesterase variety 5 (PDE5) inhibitor. PDE5 is an enzyme that regulates certain substances within your blood, but as a consequence of its effect on your body, it may make it more challenging for you to get and preserve an erection.Though the majority of