IRCT20170108031822N2 IRCT 2018-08-15 Tehran University of Medical Sciences The effect of acetaminophen on pain and outcome of close nssal fracture reduction surgery The effect of acetaminophen on pain and outcome of close nasal fracture reduction surgery under local anesthesia,compered with placebo 2018-08-23 anticipated 68 Complete https://irct.ir/trial/31601 interventional Randomization: Randomized, Blinding: Triple blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Randomization description: Randomization will be done by 4 block size, Blinding description: In the present study doctor, the patient and the analyst will be Blind. This clinical trials study is a triple blind study. It is responsible for the randomization of the person who is out of place and blind to results. Patients are numbered based on the block. Medications will be encoded and the person who gives the drugs to the patients is not known about the type of drugs. Patients are placed under close nasal reduction by a person who blinded to the group in which the patients are located. 3 Nasal bone Fracture. Intervention 1: Take 1 tablet of acetaminophen 500 mg one hour before close nasal fracture reduction. Intervention 2: Control group: Use of placebo with the same color and shape and taste. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is There is no data available.