Thiopental is a short-acting barbiturate used primarily as an anesthetic. It induces unconsciousness quickly, making it useful for surgical procedures. The drug works by depressing the central nervous system, allowing for rapid sedation. In addition to its anesthetic properties, Thiopental has been used in lethal injection protocols in some jurisdictions. It is administered intravenously and is known for its ability to produce a deep state of anesthesia with a relatively quick onset, but it can also have side effects, including respiratory depression and cardiovascular instability.