Evaluation of the Effects of Ketorolac Dose on Duration of Analgesia in Emergency Department (ED) Renal Colic Patients

Inclusion Criteria: Patients will be included if they present to the Emergency Department with (all of the following): * Adult emergency department patients \< 65 years old * One or more of the following common ED chief complaints associated with the suspected diagnosis of renal colic. These chief complaints include but are not limited to: flank pain, back pain, abdominal pain, left and/or right lower quadrant pain, and/or pelvic pain * Pain score of 4 or greater on the 0-10 NRS * Determination of treatment with IV ketorolac Exclusion Criteria: Patients will be excluded if any of the following apply: * Allergy to ketorolac * Pregnant patients * Previously received analgesic medications within 4 hours prior to administration of ketorolac in our ED * Known or stated history of renal insufficiency * Body weight \< 50 kg * Age greater than 65 years * Patients that do no read/write Spanish or English