Duloxetine is a serotonin-norepinephrine reuptake inhibitor primarily used for treatment of major depression and anxiety. Duloxetine also has been used in the treatment of chronic pain conditions, such as osteoarthritis and musculoskeletal pain. There are few studies examining its effect for acute pain. The objective of this study is to evaluate the analgesic effect of duloxetine for patients undergoing lumbar discectomy.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
70
The investigator will give the patients duloxetine capsule 60 mg orally before operation (skin incision) and anesthetize them with general anesthesia, then the investigator will test the postoperative analgesic efficacy in the form of 24 h analgesic consumption
Patients will receive single oral dose of placebo capsule, 2 hours before operation and will be anesthetized with general anesthesia that includes, Induction of anesthesia will be done by intravenous fentanyl, 2 µg / kg and propofol 1 - 2 mg / kg. Endotracheal intubation will be achieved by cis-atracurium, 0.15 mg / kg. Maintenance of anesthesia will be done by isoflurane and cis-atracurium, 0.03 mg / kg on demand. Additional intraoperative analgesia will be consisted of administration of intravenous boluses of fentanyl, 50 µg according to the attending anesthesiologist's decision. At the end of surgery, muscle relaxation was reversed using neostigmine 0.05 mg / kg and atropine 0.01 mg / kg
Diab
Asyut, Assuit, Egypt
RECRUITINGthe first 24 hour morphine consumption
the first 24 hours cumulative morphine consumed by the patient via patient controlled analgesic device (PCA), set to deliver 2 mg morphine bolus with lockout interval 15 min, without background infusion
Time frame: the first postoperative 24 hour
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