[Pharmacologic effects and safety profile of bethanechol in the differential diagnosis of pseudo-anginal thoracic pain]

The use of bethanecol has recently been proposed to improve the diagnostic accuracy of esophageal manometry in identifying the origin of symptoms in patients with non cardiac chest pain. In this study we report our experience in 30 patients who underwent esophageal functional studies. Despite its low diagnostic value, bethanecol test (two subsequential doses of 50 micrograms/kg) demonstrated an excellent safety profile, there were few side effects, and patients tolerance was good. The Holter electrocardiographic study showed an isolated case of transient atrioventricular block.