Effects of ecabet sodium, an antiulcer drug, on gastric adaptive relaxation in isolated guinea-pig stomachs.

Disturbances in the reservoir function of the stomach may cause epigastric fullness or early satiety, which are the main symptoms in patients with dysmotility-like functional dyspepsia. Gastric adaptive relaxation is involved in the reservoir function of the proximal stomach. Ecabet sodium, synthesized from abietic acid, is widely used in Japan as an antiulcer drug. The purpose of this study was to evaluate the effects of ecabet on gastric adaptive relaxation in isolated guinea-pig stomachs. Changes in intragastric volume and pressure were recorded in the presence of atropine and guanethidine. Gastric adaptive relaxation was triggered by luminal distention. Ecabet at the dose of 20 mmol/l in solutions at two pHs (pH 3.0 and 7.4) significantly lowered the threshold pressure needed for such relaxation and increased intragastric volume, but lower doses had little or no effect. The results suggested that this antiulcer drug might improve symptoms in patients with dysmotility-like functional dyspepsia.