Cenforce 100 pill is the best and most economical ED drug. It contains the same active ingredient ("sildenafil citrate") that is used in Viagra. The active ingredient, sildenafil citrate, enhances blood circulation. which helps to achieve a strong, healthy, and satisfying erection. Sildenafil citrate is an FDA-approved medical compound and it has been shown to be effective in treating erectile dysfunction. This drug should be taken 30 minutes before sexual intercourse and its effect lasts for 24 hours.