Analgesic Effects of Perioperative Propranolol Administration for Spine Surgery

Exclusion Criteria

• •Disease-related: History of exercise- or exertion-induced asthma or current treatments for asthma; Unstable medical or neurological illness; Heart block greater than first degree (EKG); History of coronary artery disease, or history of congestive heart failure; Baseline heart rate or blood pressure that in the opinion of the investigator would constitute too great a risk when considered in the context of the patient's medical comorbidities and health history; Significant suicidal or homicidal ideation, or current DSM-IV diagnosis of bipolar disorder, schizophrenia or other psychotic disorder, or cognitive disorder due to a general medical condition; History of diabetes
• •Exposure-related: History of β-blocker use within six months of enrollment in the trial; Total baseline preoperative opioid consumption greater than 50 oral milligram morphine equivalents (MME) per day; Current use or use within the past two weeks of methadone, levorphanol, buprenorphine, butorphanol, pentazocine, tramadol, nalbuphine, naloxone, or naltrexone.
• •Patient characteristics: Female patients who are pregnant or breast-feeding; Known allergy to study medication; Alcohol/substance abuse within past six months; Ongoing or anticipated disability compensation or litigation issues, in the best judgement of the investigator; Presence of any factors/conditions, medical or other, that in the judgment of the investigator may interfere with performance of study outcome measures, such as treatment-refractory history; Non-ambulatory or require the use of crutches or a walker; No access to a telephone