An effective medication for treating erectile dysfunction and impotence in men is Cenforce 100 mg Medicine. Sildenafil, an ingredient in this medication, encourages men to engage in sexual activity for an extended period of time. Take this medication half an hour before sexual activity. Only men who are at least eighteen years old should use this medication. This medication can be taken either before or after food. Consume water along with this medication. Follow your doctor's advice when taking this medication.