RT Journal Article SR Electronic T1 THE EFFECT OF A NUMBER OF CENTRAL DEPRESSANT DRUGS UPON BRAIN 5-HYDROXYTRYPTAMINE LEVELS IN THE RAT JF Journal of Pharmacology and Experimental Therapeutics JO J Pharmacol Exp Ther FD American Society for Pharmacology and Experimental Therapeutics SP 17 OP 20 VO 135 IS 1 A1 Bonnycastle, D. D. A1 Bonnycastle, M. F. A1 Anderson, E. G. YR 1962 UL http://jpet.aspetjournals.org/content/135/1/17.abstract AB A variety of central depressant drugs, including sedatives, hypnotics, analgetics, fixed and volatile anesthetics, during the course of their pharmacological action result in a significant elevation of brain 5-hydroxytryptamine as determined by biological assay (V. mercenaria). Similar increases in brain 5-hydroxytryptamine have been detected by fluorimetry following treatment of rats with pentobarbital, chloral hydrate and diphenylhydantoin. The possible role of these changes of brain 5-hydroxytryptamine in the production of the altered physiological state produced by the group of drugs in question is discussed.