The Efficacy of Metoclopramide for Gastric Visualization by Endoscopy in Patients With Active Upper Gastrointestinal Bleeding: Double-Blind Randomized Controlled Trial.

INTRODUCTION: The 2021 American College of Gastroenterology Guidelines suggested using of intravenous erythromycin before endoscopy in patients with upper gastrointestinal bleeding (UGIB) to enhance endoscopic view and reduce the need for repeat endoscopy. Evidence on intravenous metoclopramide, which is more accessible, is scant, especially in patients with active UGIB. This study aimed to evaluate the efficacy of metoclopramide for gastric visualization in patients with active UGIB.

METHODS: Between April 10, 2021, and October 8, 2022, this double-blind, double-center randomized controlled trial enrolled patients with active UGIB (hematemesis or presence of fresh blood in the nasogastric tube). The eligible patients were randomly assigned in a concealed 1:1 allocation to metoclopramide or placebo. The primary outcome was adequate visualization by objective endoscopic visualized gastroduodenal scores (EVS). Secondary outcomes included mean difference in EVS, duration of esophagogastroduodenoscopy (EGD), immediate hemostasis, need for a second look EGD, units of blood transfusion, length of hospital stay, and 30-day rebleeding rate.

RESULTS: Of the 68 eligible patients, 3 of each group were excluded by protocol violation. Finally, 62 patients (31 metoclopramide and 31 placebo) were analyzed. The percentage of patients with adequate visualization in metoclopramide and placebo group was 77.4% and 61.6% (odds ratio [OR] 2.16 [0.71-6.58], P = 0.16). The need for a second look EGD in the 72 hours was lower in the metoclopramide group (3.2% vs 22.6%, OR 0.11 [0.01-0.99], P = 0.02), whereas the other secondary outcomes were not different. However, in gastric lesions subgroup analysis, metoclopramide improved the adequate visualization rate (92.9% vs 50%, OR 13 [1.32-128.10], P = 0.03) and mean EVS at fundus (1.79 ± 0.42 vs 1.29 ± 0.72; P = 0.03).

DISCUSSION: Metoclopramide did not improve endoscopic visualization but decreased the need for second look EGD in patients with overall active UGIB. It improved gastric visualization in those with UGIB due to gastric lesions, primarily by improving visualization in the fundus ( ClinicalTrials.gov number NCT04771481).