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The study was conducted to compare the effect of • Bupivacaine Heavy 0.5% 3 ml with fentanyl (25 mcg) 0.5 ml.• Bupivacaine Heavy 0.5% 3 ml with Butorphanol (25 mcg) 0.5 ml When administered intrathecally for lower limb orthopedic procedures. MATERIAL AND METHODSAfter obtaining a written and informed consent a comparative study of 60 patients. Patients were randomly divided in two groups of 30 each. Group BB (Butorphanol group) received 25 mcg Butorphanol with 15 mg hyperbaric Bupivacaine (0.5%; 3.0 ml) Group BF (Fentanyl Group) received 25 mcg fentanyl with 15 mg hyperbaric Bupivacaine (0.5%, 3.0 ml).

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