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1 Department of Pharmacology and General Therapeutics, University of Liverpool, England
2 Laboratory of Chemical Pharmacology, National Heart Institute, National Institutes of Health, Bethesda, Maryland
N-acetyl-4-aminoantipyrine and sulfaguanidine slowly penetrate the cerebrospinal fluid and the brain proper, but enter the water space of the adenohypophysis, the neurohypophysis, the area postrema and the intercolumnar tubercle almost as readily as they penetrate the water space of liver and muscle. These results indicate that the blood-brain barrier does not exist in these brain regions.
Submitted on March 3, 1961