Acetaminophen Recruiting Phase 3 Trials for Postoperative Complications / Oximetry, Pulse / adjunct to general anesthesia therapy / Pathologic Processes / Dexmedetomidine / Anaesthesia therapy / Sleep Disordered Breathing (SDB) / Gabapentin / Analgesics / Respiratory Depression / Lidocaine / Obstructive Sleep Apnea of Child / Narcotics / Analgesics, Opioid / Ketamine / Tonsillectomy / Physiologic Effects of Drugs Prevention