In men with erectile dysfunction (ED), the PDE5 enzyme breaks down cGMP too quickly, which reduces blood flow to the penis and makes it difficult to achieve and maintain an erection. By inhibiting the PDE5 enzyme, it helps to increase the levels of cGMP in the body and improve blood flow to the penis, which allows for an erection to occur and helps to maintain it during sexual activity. Cenforce Cenforceusa Cenforce 200 Cenforce 200 Cenforce 100 Cenforce 150