Aprepitant Treatment to Prevent Postoperative Nausea and Vomiting in Children Undergoing Scoliosis Surgery

Inclusion Criteria: * Posterior Spinal Instrumentation and Fusion (PSIF) for idiopathic scoliosis * The fusion must include at least 6 vertebral levels. * Children greater than or equal to 8 years old, and less than 19 years old on the day of surgery * Weight \> 40kg - for ease of pharmacy preparation (PONV dose 1mg per kg to max 40mg) Exclusion Criteria: * Patient/ Parent refusal * Hypersensitivity to Aprepitant or any ingredient in the formulation or oral solution. (previous allergy or adverse reaction to Aprepitant) * Developmental delay as reported by parents * Pregnant - Pregnancy test done as standard of care pre-operative * Severe systemic disease ASA classification III or greater * Concurrent use of any medication with severe interaction with Aprepitant as outlined in product monograph. * Neuromuscular or congenital scoliosis * Inability to take PO medications