Purpose: Determine the efficacy of intravenous acetaminophen, Tab acetaminophen codeine,Tab oxycodone in analgesia after Septorhinoplasty surgery.
Methods: Multicenter, double-blind clinical trial,on 75 patients, men and women 18 to 40 years, patients must not have any underlying disease, three groups of 25 each, for all patients will infused 1000 mg intravenous acetaminophen over 20 min in the recovery room after surgery. After 6 h of injection of intravenous acetaminophen, 25 patients will take 2 tablets of acetaminophen codeine 300/10 every 6h, 25 patients will take 2 tablets of oxycodone 5 mg every 8 h, and 25 patients will take 1000 mg intravenous acetaminophen every 8 h, until 24 h, The pain of patients will scale with VAS score every 4 h and vital signs monitoring will be every 4 h.