IRCT20190819044559N1 IRCT 2019-11-04 Kerman University of Medical Sciences Effect of oral Magnesium oxide on preoperative analgesia in hysterectomy Comparing the preoperative analgesia effects of oral Magnesium oxide and Naproxen for hysterectomy surgery in Afzalipour hospital , Kerman, 2019 2019-08-13 anticipated 64 Complete https://irct.ir/trial/42636 interventional Randomization: Randomized, Blinding: Triple blinded, Placebo: Not used, Assignment: Parallel, Purpose: Prevention, Randomization description: In this study, patients randomly divided in two groups (32 patients in each group) using random allocation sequence with SAS statistical software. according to this method a simple randomization list product and patients`involvement in each group determine base on order entry. we used sequentially numbered, sealed opaque envelopes for allocation concealment. patients (individuals) were the randomization units, Blinding description: Patients, main investigator and data analyser were masked of patients allocation. patients did not know which drug prescribed and checklists did not contain any drug name. only the nurse know the name of medication. 1-2 Pain after hysterectomy surgery. Intervention 1: Intervention group: receiving oral Magnesium oxide (500 mg) 1.5 hour before surgery. Intervention 2: Control group: receiving oral Naproxen (500 mg)1.5 hour before surgery. 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 further information