RT Journal Article SR Electronic T1 ABSORPTION OF DRUGS FROM THE STOMACH. II. THE HUMAN JF Journal of Pharmacology and Experimental Therapeutics JO J Pharmacol Exp Ther FD American Society for Pharmacology and Experimental Therapeutics SP 540 OP 545 VO 120 IS 4 A1 Hogben, C. Adrian M. A1 Schanker, Lewis S. A1 Tocco, Dominick J. A1 Brodie, Bernard B. YR 1957 UL http://jpet.aspetjournals.org/content/120/4/540.abstract AB The human stomach is capable of absorbing most acidic drugs and the very weakly basic drugs. Salicylic acid, aspirin, thiopental, secobarbital and antipyrine, which are undissociated in the acidic gastric contents, were readily absorbed. Phenol red, quinine, ephedrine and aminopyrine, which are almost completely ionized in acid solution were not absorbed. These results are compatible with the hypothesis that drugs are absorbed by passive diffusion of their lipid soluble undissociated form. Many drugs may be absorbed by the human stomach as rapidly or more rapidly than ethyl alcohol.