Generic Cenforce 100mg which contains sildenafil is used to treat erectile dysfunction. This medicine is used in both cases when your ED is triggered by a physical or mental disorder. This medicine but only in the right dosage will help you maintain a strong erection for a long time. This medicine can be taken by people above 18 years of age. This medicine should be taken 1 hour before sexual activity. The effect of this medicine is seen within 30 minutes depending on the individual.