Potassium and glucose concentrations in patients treated with oral tocolytic agents: a preliminary report.

Fifteen patients referred to the Division of Maternal-Fetal Medicine with the diagnosis of cervical incompetence were placed in a study protocol where prophylactic oral beta mimetic agents were used in an attempt to prevent cervical dilatation between 20 and 36 weeks of gestation. Our study suggest that after the first week of therapy prolonged maternal oral tocolytic therapy has no significant effect on glucose or serum potassium levels and no deleterious effects on the immediate neonatal course.