IRCT20210921052538N1 IRCT 2022-06-08 Mashhad University of Medical Sciences Comparing Of Ketrolac Plus Apotel and Meperidine in Decrease Of Pain After surgery Comparing Of Ketrolac Plus Apotel and Meperidine in Decrease Of Pain After Right Thoracotomy 2021-12-26 anticipated 60 Complete https://irct.ir/trial/58861 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Other, Purpose: Treatment, Randomization description: In this study, block randomization will be used as a reliable randomization method. For this purpose, an online website addressed as (https://www.sealedenvelope.com/simple-randomiser/v1/lists) is used to create random blocks with different sizes depending on the total sample and proposed block sizes (4 and 6). Each block content is sealed. One of the block is randomly chosen when a patient refers. The patient is assigned to one of the study arms depending on the block content. Similarly, after the completion of the first block, the second block is randomly selected and this continues until the last block and the last patient is assigned to the study arms. By assigning the last sheet of the last block, the patients are grouped equally in the two study arms, Blinding description: The method of the envelope is that the envelopes will be prepared and printed by one of the members of the research team and random numbers with the help of Randomaize.com site and will be placed inside the envelope. The lid of the envelope will be closed and its contents will not be visible from the outside. Then, the purpose of the study is first explained to the person who meets the conditions, and the person, if desired, signs the informed consent form and takes an envelope, and then opens it and enters the intervention or control group based on the contents of the envelope. 2-3 surgery. Intervention 1: Control group: receive meperidine in case of pain ( 0.5 -1mg/kg). Intervention 2: Intervention group:Intravenous ketorolac - paracetamol:At the beginning of recovery in the intervention group, one gram of paracetamol and 30 mg of ketorolac as an infusion are prescribed to reduce and control pain.( the ketrolac is bought from exire co (Iran). And the paracetamol was bought from Unifarma co (Iran). Yes - There is a plan to make this available What will be shared: Only part of the data such as information about the main outcome or the like can be shared. When: 6 months after publication To whom: professor and student of university Conditions: Mashhad medical student Where to obtain: No 7- 4th Amin- Amin street - Sajad BLVD- How to obtain: email request Comments: