Gamma Hydroxybutyrate and Gamma Butyrolactone: Concentration in Rat Tissues during Anesthesia

Abstract
Gamma-hydroxybutyric acid, when administered to animals or human beings, causes sleep. It is convertible to gamma-butyrolactone, which also produces sleep. Tissue concentrations in rats after administration of these two compounds show that the induced sleep is related to the concentration of the lactone in the brain.