(Alprostadil is also referred to as prostaglandin E1. In powdered type, it could be called CaverJect or Edex.) Papaverine moreover phentolamine moreover alprostadil (Tri-Blend) is considered the most strong selection. It calls for refrigeration and has the same side effects as papaverine and alprostadil. Quad-Combine, a mix of Tri-Mix and a drug id