A nurse is reviewing a prescription to initiate an infusion of terbutaline at 2.5 mcg/min to a client PRN more than four uterine contractions in 1 hr and to increase the infusion by 5 mcg/min every 10 min until contractions stop, not to exceed a rate of 30 mcg/min. How should the nurse interpret this prescription?

A. The nurse should ensure that the rate of the client's terbutaline infusion does not exceed 18 mg/hr. The prescription limits the maximum rate to 30 mcg/min, not 18 mg/hr (which would be an extremely high and unsafe dose). B. The nurse should initiate the infusion of terbutaline if the client has five or more contractions in 1 hr. The prescription states to start the infusion PRN if the client has more than four contractions in one hour, which means the nurse should begin the infusion if the client experiences five or more contractions in an hour to help prevent preterm labor. C. The nurse should increase the drip rate of the infusion by 5 mL/hr when titrating the dosage. The prescription specifies increasing the infusion rate by 5 mcg/min every 10 minutes, but the actual mL/hr rate depends on the concentration of the terbutaline infusion, so this statement is inaccurate. D. The nurse should weigh the client to determine the rate of the terbutaline infusion. The prescribed dosing is not weight-based, so obtaining the client’s weight is not necessary for determining the infusion rate.