Penegra 100 Mg is a medication that is used to treat erectile dysfunction, a condition that affects men's ability to achieve and maintain an erection during sexual activity. The medication contains sildenafil citrate, which works by increasing blood flow to the penis, allowing for a firmer and longer-lasting erection. Penegra 100 Mg is a medication that is used to treat erectile dysfunction, a condition that affects men's ability to achieve and maintain an erection during sexual activity. The medication contains sildenafil citrate, which works by increasing blood flow to the penis, allowing for a firmer and longer-lasting erection.