PT - JOURNAL ARTICLE AU - R. H. Buller AU - W. T. Rockhold AU - J. A. Buzard AU - I. J. Stern TI - THE POTENTIATING EFFECT OF 4,5-DIHYDRO-6-METHYL-2[2-(4-PYRIDYL)-ETHYL]-3-PYRIDAZINONE (U-320) ON HEXOBARBITAL HYPNOSIS DP - 1961 Oct 01 TA - Journal of Pharmacology and Experimental Therapeutics PG - 95--99 VI - 134 IP - 1 4099 - http://jpet.aspetjournals.org/content/134/1/95.short 4100 - http://jpet.aspetjournals.org/content/134/1/95.full SO - J Pharmacol Exp Ther1961 Oct 01; 134 AB - A new agent, 4,5-dihydro-6-methyl-2-[2-(4-pyridyl)ethyl]-3-pyridazinone (U-320), has been found to be a potentiator of hexobarbital. It prolongs plasma and brain levels of hexobarbital qualitatively similar to SKF-525A, but it may be differentiated from this compound by its ability to reinduce sleep in rodents recovering from hexobarbital hypnosis and will induce sleep when combined with subhypnotic doses of hexobarbital.