Acute pseudo-obstruction of the colon (Ogilvie's syndrome) resulting from combination tocolytic therapy.

We describe a case of colonic pseudo-obstruction occurring in a pregnant patient whose preterm labor was being treated with intravenous magnesium and nifedipine. Sequential colonoscopies were required to manage the recurrent colonic dilations prior to delivery of healthy twins. There was no recurrence after delivery and discontinuation of the tocolytics.