Inhibition of gastric acid secretion with a mast cell stabiliser, FPL-52694

1 The effect on gastric acid secretion of a mast cell stabiliser FPL-52694 was examined in nine healthy volunteers. 2 The compound which is moderately well absorbed after oral ingestion, was taken for 5 days prior to the measurement of acid secretion and was also given intravenously during part of the gastric test. A submaximal dose of pentagastrin (0.3 microgram/kg/h) was given by intravenous infusion for 2 h in a controlled test and then after administration of FPL-52694. 3 There was a significant reduction (37%) in acid secretion during the second test which was probably due to the effect of the compound on mast cell degranulation in the gastric mucosa.