Sodium thiopental,Pancuronium and Potassium chloride

                      1. Sodium thiopental: ultra-short action barbiturate, an
anaesthetic agent capable of rendering the prisoner unconscious in a few seconds. Sodium thiopental, better known as Sodium Pentothal (a trademark of Abbott Laboratories), thiopental, thiopentone sodium, or trapanal, is a rapid-onset short-acting barbiturate general anaesthetic. Sodium thiopental is a depressant and is sometimes used during interrogations—not to cause pain (in fact, it may have just the opposite effect), but to weaken the resolve of the subject and make him or her more compliant to pressure.[3] Thiopental is a core medicine in the World Health Organization's "Essential Drugs List", which is a list of minimum medical needs for a basic health care system.


              Sodium thiopental structure

              C12 H19 N2 Na O2 S


      2.Pancuronium: non-depolarizing muscle relaxant, causes complete, fast and sustained paralysis of the skeletal striated muscles, including the diaphragm and the rest of the respiratory muscles; this would eventually cause death by asphyxiation. Pancuronium is a chemical compound, used in medicine as the bromide salt pancuronium bromide. It has the brand name Pavulon (Organon International). It is a muscle relaxant with various purposes. It is one of the drugs administered during a lethal injection in the United States.

  C35 H6 0Br2 N2 O4


          3.Potassium chloride: KCl- stops the heart, and thus causes death by cardiac arrestThe chemical compound potassium chloride (KCl) is a metal halide salt composed of potassium and chlorine. In its pure state it is odorless. It has a white or colorless vitreous crystal, with a crystal structure that cleaves easily in three directions. Potassium chloride crystals are face-centered cubic. Potassium chloride is occasionally known as "muriate of potash," particularly when used as a fertilizer. Potash varies in color from pink or red to white depending on the mining and recovery process used. White potash, sometimes referred to as soluble potash, is usually higher in analysis and is used primarily for making liquid starter fertilizers. KCl is used in medicine, scientific applications, food processing and in judicial execution through lethal injection. It occurs naturally as the mineral sylvite and in combination with sodium chloride as sylvinite. KCl