The medication Cenforce 100 is intended to treat erectile dysfunction and impotence in males. Sildenafil is a component in this medication. During sexual activity, this medication aids in producing a powerful erection. This medication is used half an hour before sexual activity. Take the worker's medication with a glass of water. This medication takes four to six hours to take effect. Follow your doctor's advice when taking this medication. Alcohol and fatty meals should not be consumed with this medication as they will decrease its effectiveness.