<prompt> Which of the following drugs are believed to be effective in the treatment of post operative shiveringOndansetronDiclofenac sodiumPethidineParcetomol  <response>: Pethidine is most effective drug for treatment of post operative shivering. Other drugs that can be used for this purpose are Clonidine Doxapram Ketanserin Alfentanil Refer anaesthesiology by Longnecker 1485 