Erectile dysfunction (ED) is the inability to get and keep an erection firm enough for sexual intercourse. Estimates suggest that one in every 10 men will suffer from ED at some point during his lifetime. It is important to understand that in most cases, ED is a symptom of another, underlying problem. Cenforce 25 eliminates the problem of impotence in men. Take this medicine 30 minutes before intercourse. The effect of this drug lasts for 4 to 6 hours. Take this medicine with water but do not break or chew the medicine.