AbstractParenteral nutrition (PN) compounding is a complex process that requires knowledge and training to ensure the safety and efficacy of this form of nutrition support therapy. Unfortunately, errors and lack of adherence to safe PN compounding recommendations and sterile compounding requirements have resulted in patient injury and death. These lapses in the safe provision of PN have been the result of various factors, including a lack of understanding of PN compatibility, stability, and sterility requirements, as well as drug product shortages and order entry errors. This review will describe the current challenges with the education and training regarding PN compounding, compatibility and stability of PN admixtures, simultaneous administration of nonnutrient medications with PN admixtures, and specific challenges with special populations such as neonates, pediatrics, and those receiving home care.