Cenforce 25mg is an FDA-approved erectile dysfunction drug manufactured by Centurion Laboratories. It contains sildenafil citrate as its main ingredient which works by increasing the level of CGMP. Cenforce must be taken 30 minutes or 1 hour before sexual activity and the effects can last up to four hours. There are also some side effects of this tablet so if you take this tablet you need to consult your doctor 1 time.