Effect of ranitidine on theophylline metabolism in healthy Koreans living in China

Gastroesophageal reflux and histamine2 antagonists

GASTROESOPHAGEAL REFLUX (GER) IS THE RETROGRADE movement of the stomach contents into the esophagus, frequently caused by relaxation of the lower esophageal sphincter (LES). The pathophysiology of GER in neonates is not clear. However, many risk factors have been defined (Table 1).1Several developmental factors may influence the incidence of GER in neonates. Jadcherla suggests abdominal wall muscle tone, diaphragmatic activity, esophageal dysmotility, and LES tone as possible reasons for the prevelance of GER in the neonatal population.