Purpose: Antineoplastic preparation presents unique safety concerns and consumes significant pharmacy staff time and costs. Robotic antineoplastic and adjuvant medication compounding may provide incremental safety and efficiency advantages compared with standard pharmacy practices. Methods:We conducted a direct observation trial in an academic medical center pharmacy to compare the effects of usual/ manual antineoplastic and adjuvant drug preparation (baseline period) with robotic preparation (intervention period). The primary outcomes were serious medication errors and staff safety events with the potential for harm of patients and staff, respectively. Secondary outcomes included medication accuracy determined by gravimetric techniques, medication preparation time, and the costs of both ancillary materials used during drug preparation and personnel time.Results: Among 1,421 and 972 observed medication preparations, we found nine (0.7%) and seven (0.7%) serious medication errors (P ϭ .8) and 73 (5.1%) and 28 (2.9%) staff safety events (P ϭ .007) in the baseline and intervention periods, respectively. Drugs failed accuracy measurements in 12.5% (23 of 184) and 0.9% (one of 110) of preparations in the baseline and intervention periods, respectively (P Ͻ .001). Mean drug preparation time increased by 47% when using the robot (P ϭ .009). Labor costs were similar in both study periods, although the ancillary material costs decreased by 56% in the intervention period (P Ͻ .001). Conclusion:Although robotically prepared antineoplastic and adjuvant medications did not reduce serious medication errors, both staff safety and accuracy of medication preparation were improved significantly. Future studies are necessary to address the overall cost effectiveness of these robotic implementations.

Purpose The purpose of this study was to evaluate the extended stability of extemporaneously prepared regular human insulin 100 units in 0.9% sodium chloride at a total volume of 100 mL under refrigeration. Methods Three admixtures of regular human insulin were prepared aseptically under a laminar flow hood at time zero. They were prepared by withdrawing 1 mL of regular human insulin with a concentration of 100 units/mL and adding it to a sufficient quantity of 0.9% sodium chloride for injection in a Polyvinylchloride (PVC) bag to yield a total volume of 100 mL. The 3 admixtures were stored refrigerated(2°C to 8°C [36°F to 46°F]) and three 1 mL samples of each admixture were withdrawn, transferred to a test tube, and frozen(–30°C to −15°C [–22°F to 5°F]) at hours 0, 6, 12, 36, 48, 72, 96, 120, 144, and 168. Insulin concentrations were measured by chemiluminescent immunoassay. The time points were considered stable if the mean concentration of the samples exceeded 90% of the equilibrium concentration at hour 6. Results The equilibrium concentration was 0.57 units/mL. Time points were considered stable if the mean concentration was at least 0.52 units/mL. All time points retained at least 90% of the equilibrium concentration with the exception of hour 120(0.46 ± 0.05 units/mL). At hour 168, the mean concentration was 0.63 ± 0.07 units/mL. Conclusion Regular human insulin 100 units added to 0.9% sodium chloride for injection in a PVC bag to yield a total volume of 100 mL is stable for 168 hours when stored at 2°C to 8°C(36°F to 46°F).