Sildenafil acts as an active ingredient in the drug Cenforce. Cenforce drug is mainly used when the male suffers from erection problem. These types of tablets are used as a solution to tires. Sildenafil acts as the active ingredient in the Cenforce drug. Cenforce tablets are taken some time before intercourse, after which the effect lasts for 4-5 hours. It is advisable to consult a doctor before taking Cenforce tablets. Tadalista is also found in different powers.