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How does Sildenafil Citrate (generic Viagra®) work?

Last Updated 5/14/2024

Sildenafil Citrate (generic Viagra®)* works by blocking PDE5 (phosphodiesterase type 5), an enzyme in the body that breaks down the chemicals responsible for blood flow (and therefore erections). The result is increased blood flow to the penis to help a man get and keep an erection.

How does Sildenafil Citrate (generic Viagra®) work?

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