Cenforce D is a prescription medicine used to treat erectile dysfunction (impotence) in men. It works by increasing blood flow to the penis. This Helps Men To Get Or Maintain An Erection. You Should Take It About 1 Hour Before You Plan To Have Sex. Take this medicine with water but do not break or chew the medicine. Do not consume alcoholic beverages or fatty foods with this drug. Take this medicine as advised by your doctor. The effect of this drug lasts for 4 to 6 hours. This drug is only taken by men over 18 years of age.