[https://journals-lww-com.ezproxy.lib.utah.edu/anesthesiology/pdf/10.1097/00000542-198212000-00005~pharmacodynamics-and-pharmacokinetics-of-methadone-during A 1982 study] published in Anesthesiology reported that 23 general surgery and orthopedic patients were given 20 mg IV methadone bolus at induction, 100% required no additional opioids in the first 18 hrs post-op. 25% required only non-opioid analgesics. 40% did not need any additional treatment for post-op pain. There was no respiratory depression. | [https://journals-lww-com.ezproxy.lib.utah.edu/anesthesiology/pdf/10.1097/00000542-198212000-00005~pharmacodynamics-and-pharmacokinetics-of-methadone-during A 1982 study] published in Anesthesiology reported that 23 general surgery and orthopedic patients were given 20 mg IV methadone bolus at induction, 100% required no additional opioids in the first 18 hrs post-op. 25% required only non-opioid analgesics. 40% did not need any additional treatment for post-op pain. There was no respiratory depression. |