Penegra 100 mg is a medication used to treat erectile dysfunction (ED) in men. The active ingredient in Penegra is sildenafil citrate, which is a phosphodiesterase type 5 (PDE5) inhibitor. Sildenafil citrate works by increasing blood flow to the penis during sexual stimulation, facilitating the ability to achieve and maintain an erection. The effects of Penegra 100 mg are similar to other sildenafil-containing medications and typically last for about 4 to 6 hours. Sexual stimulation is necessary for the medication to be effective.


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