Cenforce is a medicine taken by men today for sexual problems. These sexual problems include impotence, erectile dysfunction, and amorous ejaculation. This medicine contains an ingredient called sildenafil which helps men to get stronger, harder and longer erections during intercourse. This medicine works effectively if taken 30 minutes or 1 hour before intercourse. You can take this medicine before or after food. The effect of this medicine lasts for 4 to 6 hours.