| LC-MS/MS | Liquid Chromatography–Tandem Mass Spectroscopy |
| ED | Emergency Department |
| COWS | Clinical Opiate Withdrawal Scale |
| MDM | Multiple Reaction Monitoring |
| PDD | Patient-Directed Discharge |
| 3-OH-M | 3-hydroxy-medetomidine |
| ICU | Intensive Care Unit |
| OUD | Opioid Use Disorder |
| NSTEMI | Non-ST Segment Elevation Myocardial Infarction |
| hsTnT | High-Sensitivity Troponin T |
| PRES | Posterior Reversible Encephalopathy Syndrome |
| MOUD | Medication for Opioid Use Disorder |