Thiopental sodium (Thiopentalum-natrium; synonymous with Pentothal sodium; list B ) is a non-inhalational drug derived from barbituric acid. A single narcotic dose of sodium thiopental causes anesthesia lasting 20-25 minutes. Applied for induction anesthesia for short-term operations. 1.25 or 2.5% solution is injected slowly intravenously. Solutions are prepared immediately before use. The highest single and daily dose —1 g. Thiopental sodium is contraindicated in diseases of the liver, kidneys, diabetes, exhaustion, shock, collapse, bronchial asthma, inflammatory diseases of the throat and nasopharynx, and feverish conditions. Form release: vials containing 0.5 or 1 g of the substance. See also Narcotic drugs.