Penegra 100 mg is a medication containing sildenafil citrate 100 mg, a PDE5 inhibitor used for the treatment of erectile dysfunction (ED) in adult men. It helps improve blood flow to the penis during sexual stimulation, supporting the ability to achieve and maintain an erection. Sildenafil works by blocking the PDE5 enzyme, which helps relax and widen blood vessels in the penis. This allows increased blood flow when a man is sexually aroused. Penegra does not increase sexual desire and will not work without sexual stimulation.

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