Sildenafil acts as the active ingredient in Cenforce 25 tablets. Cenforce 25 is usually taken one hour before sex, after which the effect lasts for 5-6 hours. Cenforce 25 Mg is the best ED drug used by men. Cenforce 25 is widely used to address the problem of sex. Cenforce 25 is used more by men, but women should avoid using it even if it is only used by men.