beta 2-Sympathomimetics have been used in acute intrapartum fetal distress to abolish uterine contractions and thus enable the fetal metabolism to recover before delivery. Because some serious complications were reported when a terbutaline intravenous bolus (0.25 mg) was used as a tocolytic, we assessed its safety and efficacy when used in patients not affected by cardiovascular disease, tachycardia greater than 100 beats/min, thyrotoxicosis, fluid overload, corticoids, atropine, or severe abruptio placentae. No maternal or fetal complications occurred in the 36 patients studied; a well-tolerated tachycardia developed in most patients. Fetal heart rate tracings and pH improved in 32 patients. Thirty-four neonates were delivered in good clinical and metabolic condition. We conclude that terbutaline intravenous bolus 0.25 mg is a safe and efficacious procedure when the proper indications and contraindications are followed.
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