Aim: The aim of the present study was to evaluate the effect of amoxicillin/clavulanate (A/C) on gastrointestinal motility.
Methods: Twenty consecutive pediatric patients referred for antroduodenal manometry received 20 mg/kg of A/C into the small bowel lumen. In 10 patients (group A), A/C was given 1 hour after and in 10 (group B), 1 hour before ingestion of a meal. Characteristics of the migrating motor complex, including presence, frequency, amplitude, and propagation of duodenal phase III and phase I duration and phase II motility index (MI), were evaluated 30 minutes before and after A/C administration.
Results: There were no statistically significant differences in age and sex between the 2 groups. Manometry studies were considered normal in 8 patients in each group. In group A, 2 patients developed duodenal phase III after receiving A/C, and no significant difference was found in the MI before and after the drug administration. In group B, 9 patients developed duodenal phase III (P < 0.05 vs group A). All phase III occurred within a few minutes from the medication administration. Most duodenal phase III contractions were preceded by an antral component during fasting but never after the medication was administered in either of the 2 groups (P < 0.001 vs fasting). In group B, the duration of duodenal phase I was shorter after drug administration (P < 0.05). There was no significant difference in duodenal phase II MI before and after A/C administration for the 2 study groups.
Conclusions: In children, administration of A/C directly into the small bowel before a meal induces phase III-type contractions in the duodenum, with characteristics similar to those present in the fasting state. These data suggest the possible use of A/C as a prokinetic agent. Further studies are needed to clarify its specific mechanism of action and the group of patients most likely to benefit from its use.
Division of Pediatric Gastroenterology, Hepatology and Nutrition, Nationwide Children's Hospital, Columbus, OH.
Address correspondence and reprint requests to Roberto Gomez, MD, Division of Gastroenterology, Hepatology, and Nutrition, Wake Forest University Baptist Medical Hospital, Medical Center Boulevard, Winston Salem, NC 27157 (e-mail: firstname.lastname@example.org).
Received 25 April, 2011
Accepted 13 June, 2011
The authors report no conflicts of interest.