Lack of effect of arbaprostil on the human non-pregnant uterus

Arbaprostil ((15R)-15-methyl Prostaglandin E2) is being studied for the treatment of gastrointestinal illness. To determine its effect on the human uterus, eight sterilized pre-menopausal women were studied during the proliferative phase of their menstrual cycle. Using a microtransducer catheter, intra-uterine pressures were recorded for at least 30 minutes prior to and 2 hours after arbaprostil administration. Each subject was studied four times, at 48-hour intervals, receiving in a double-blind manner; 0, 10, 25, and 50 micrograms. Arbaprostil at does up to 50 micrograms was found not to have any clinically significant effects on the non-pregnant human uterus.