IRCT20230805059046N1 IRCT 2023-09-03 Qazvin University of Medical Sciences "Comparison of the effect of Dexmedetomidine + Marcaine with Fentanyl + Marcaine in femur fracture surgery" Comparison of the analgesia effect of Dexmedetomidine with Fentanyl, in combination with Marcaine in femoral neck fracture surgery with spinal anesthesia 2023-08-23 anticipated 75 Complete https://irct.ir/trial/71829 interventional Randomization: Not randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Blinding description: This is a double-blind type of experiment, which will be blind for the people participating in the study and evaluating the outcome. In the consent form to participate in the study, it is written for the patient that his presence does not necessarily mean intervention but may be included in the control group. 3 Femoral neck fracture surgery. Intervention 1: Intervention group A: (25 μg/kg Fentanyl from Caspian Tamin Pharmaceutical Company and 2.5 mg/kg Marcaine from Adorateb Pharmaceutical Company). After patients enter the operating room, anesthesia is started with spinal anesthesia, and the anesthesiologist starts prescribing Marcaine-Fentanyl. Intervention 2: Intervention group B: (5μg/kg Dexmedetomidine from Exir Pharmaceutical Company and 2.5mg/kg Marcaine from Adorateb Pharmaceutical Company). After patients enter the operating room, anesthesia is started with spinal anesthesia and the anesthesiologist prescribes Markain-Dexmedetomidine. Intervention 3: Control group: Routine hospital anesthesia method (2.5mg/kg Marcaine from Adorateb Pharmaceutical Company). After patients enter the operating room, anesthesia is started with spinal anesthesia and the anesthesiologist prescribes Markain. 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 Satisfaction of participants