If you are using cenforce 150 mg tablet for the treatment of erectile dysfunction then men should take this medicine 30 minutes before sexual intercourse. The effect of this medicine lasts for 4-5 hours so men should take this medicine for 24 hours. You should take this medicine only once in a while. You should not eat heavy food and you should not consume alcohol. This medicine comes in different doses. Therefore, it is necessary to consult your doctor while taking this medicine.