Vardenafil (Levitra) 20mg is a drug which is used for the treatment of Erectile Dysfunction (ED, or Impotence) in men who cannot achieve an erection due to some cardiac disease. The active ingredient Vardenafil helps to enhance the blood circulation throughout the body (including the penis) and helps men to satisfy their partner in bed. This medicine works well on a full stomach. This is the reason why it is better than Viagra. The effects of this medicine last for as long as 5-8 hours. Take one pill of Vardenafil (Levitra) 20mg 30 minutes to 1 hour before sex or as advised by the doctor.