Pos-T-Vac Medical Pos-T-Vac is a leader in the non-surgical treatment of erectile dysfunction known as Vacuum Therapy. We have been manufacturing and marketing systems for the safe treatment of erectile dysfunction and impotence for 15 years. Urologists around the world have prescribed and recommended Pos-T-Vac systems for the treatment of erectile dysfunction, and medical studies have been published in the American Journal of Urology and the British Journal of Urology, proving the safety and high success rate of Vacuum Therapy Systems. The United States FDA approved our system for sale without prescription, ensuring your discreet, confidential and immediate purchasing of the product.