do the same as you did on the ( Pharmacokinetics of Oral and Intravenous Paracetamol (Acetaminophen) When Co-Administered with Intravenous Morphine in Healthy Adult Subjects ) but this time on this study https://emj.bmj.com/content/31/3/177.long (Intravenous paracetamol versus dexketoprofen versus morphine in acute mechanical low back pain in the emergency department: a randomised double-blind controlled trial) by Raffa RB1, Pawasauskas J2, Pergolizzi JV Jr3, Lu L4, Chen Y5, Wu S5, Jarrett B4, Fain R4, Hill L4, Devarakonda K6