IRCT20230612058463N1 IRCT 2023-07-09 Islamic Azad University Effect of dextromethorphan and vit c in postoperative pain in abdominal surgery Comparison The effect of intravenous vitamin C with dextromethorphan syrup before abdominal surgery on postoperative pain 2023-04-04 anticipated 150 Complete https://irct.ir/trial/70635 interventional Randomization: Not randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Blinding description: Medicines are given to patients without knowing the type of syrup or the type of ampoule. The nurse knows about the prescribed medicine, but the researcher does not. 3 Abdominal post operative pain. Intervention 1: Intervention group: Patients receiving dextromethorphan syrup, each 5 cc of which contains 15 mg of dextromethorphan in the amount of 15 cc in patients under 60 kg and 30 cc in patients over 30 kg by spoon orally before It is consumed from entering the operating room. Intervention 2: Control group: patients receiving 300 mg of injectable vitamin C drug in 200 cc volume of normal saline and administered intravenously to the patient before surgery. Yes - There is a plan to make this available What will be shared: Full text of thesis When: 2023 To whom: Physicians and medical students Conditions: Research Where to obtain: parvizforooghy@gmail.com How to obtain: 5 days Comments: