Ray K, Adithan C, Bapna J S, Kangle P R, Ray K, Ramakrishnan S
Br J Clin Pharmacol. 1985 Aug;20(2):174-6. doi: 10.1111/j.1365-2125.1985.tb05054.x.
The effect of short surgical procedures on paracetamol elimination was studied in seven male patients undergoing surgery with epidural anaesthesia. Five healthy volunteers who did not undergo surgery served as a control group. Paracetamol concentration was measured in saliva at various intervals 1 day before and after surgery. Paracetamol half-life (t1/2,z) decreased and metabolic clearance rate (CL) increased after surgery as compared to preoperative values. The results suggest that surgical stress may enhance the hepatic metabolism of paracetamol.