Objective: The general objective of this study is to analyze the scientific literature on the complications and risks associated with prolonged parenteral nutrition in pediatric and neonatal patients in intensive care units (ICU), aiming to ensure greater knowledge about this therapeutic practice and its clinical implications. Methodology: The searches were performed through searches in the PubMed Central (PMC) databases. Three descriptors were used in combination with the Boolean term “AND”: Parenteral Nutrition, Neonatal Intensive Care Unit and Risk Factors. A total of 101 articles were found, which were subsequently submitted to the selection criteria. After applying the inclusion and exclusion criteria, 20 studies were selected, of which 10 articles were used for detailed analysis. Results: Parenteral nutrition (PN) is essential in the care of premature newborns and critically ill pediatric patients. However, it is associated with several potential complications, including hepatobiliary, infectious, mechanical and metabolic problems such as hyperglycemia and hypertriglyceridemia. Administration of PN requires careful planning and strict safety policies to minimize risks and maximize clinical benefits. Prolonged PN can lead to serious complications, such as catheter-associated bloodstream infections, cholestasis, and liver dysfunction. Conclusion: Prolonged PN in pediatric and neonatal ICU patients is associated with significant risks that require close surveillance and preventive interventions. Continuous monitoring of glucose, triglyceride levels, and liver function, as well as rigorous infection control practices, are crucial to ensure the safety and efficacy of PN. Further studies are needed to identify management strategies that can reduce these complications and improve clinical outcomes.