jonamdicks
Joined: 06 Jul 2021
Posts: 431
Posted: 2023-03-13 13:35
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The active ingredient in Viagra is sildenafil, which is known medically as a PDE5 inhibitor. Sildenafil inhibits (blocks) an enzyme which regulates blood flow in the penis. PDE5 inhibitors multiply the natural process of arousal and increase blood flow to the penis in situations of sexual stimulation. Sildenafil helps to achieve an erection but relies on natural arousal as a trigger. It, and other PDE5 inhibitors such as tadalafil, vardenafil, and avanafil, support sexual relations when erections are failing
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