Anesthesia is a very powerful drug. It is usually used for medical reasons. Anesthesia causes unconsciousness which makes you feel less or no pain at all. Anesthesia is given to a patient in two different ways. It is either inhaled in a gas form, or injected with a needle. Anesthetics usually use intravenous injections because they are less painful, faster, and more reliable. Some of the intravenous injections include ketamine, etomidate, and thiopental.

Sodium Thiopental, or Pentothal, was discovered by Ernest H. Volwiler and Donalee L. Tabern in 1936. Pentothal is a yellow crystal that dissolves in water. It also usually smells somewhat like garlic. Its structural name is sodium 5-ethyl-5-(1-methylbutyl)-2-thiobarbiturate, empirically it is NaSC11H17O2N2. Although it has many uses now, it was originally used to help numb patients in surgeries.

Thiopental works very quickly and has no painkiller in it. This...