Ketorolac on Posterior Thoracolumbar Spinal Fusions

Inclusion Criteria: * Over 18 years of age * Elective thoracolumbar posterior lumbar instrumented interbody fusion * Minimally invasive spine surgery (MIS) * 3 or fewer levels * Bone Morphogenetic Protein (BMP) use in interbody fusion (1.05mg/level or less) * Consent to study participation Exclusion Criteria: * Active tobacco smoker or history of tobacco smoking in the past 6 weeks * Previous history of surgery at operative level(s) * History of chronic inflammatory/rheumatological condition * History of systemic steroid use in the past 3 months * Auto/Workers' compensation patients * Traumatic pathology at the operative levels * Infection at the operative levels * Tumor at the operative levels * Major psychiatric illness as diagnosed by psychiatrists and on major anti- psychotic/depressants * Patients on chemotherapeutic agents in the last 6 months * Patients who has a history of allergy to Ketorolac * Patients with a history of chemical addiction requiring professional rehabilitation and/or assistance * Patients with current creatinine \> 1.5mg/dl * Patients with history of coagulopathy * Patients with history of hepatic impairment * Patients with uncontrolled cardiovascular disease