Investigating the Effects of Premedication with Low-Dose Fentanyl, Lidocaine and Ketamine on Fentanyl-Induced Cough

Objective: This study was designed to investigate whether premedication with low-dose fentanyl, lidocaine and ketamine can decrease the incidence of FIC efficiently. Design: A randomized double-blind clinical trial study. Setting: Shahid Sadoughi hospital, Shahid Sadoughi University of medical sciences, Yazd, Iran. Patients or Subjects: 200 patients undergoing surgery were randomly allocated into four group