Sixty patients undergoing lower limb orthopedic surgery with torniquet are studied in this randomized clinical trial. Inclusion criteria: ASA class 1, 2 and aged between 20-65. Exclusion criteria: emergency surgeries;patient dissatisfaction; infection of injection site; high intracranial pressure; coagulopathy; difficulties to communicate with patient in order to evaluate them during surgery; addiction; allergies to spinal anesthetic drugs. Patients are randomly allocated into one of these two groups: A= 12-15 milligram bupivacaine+ 25 microgram fentanyl+ 0.1 milligram epinephrine. B= 12-15 milligram bupivacaine+ 25 microgram fentanyl+ 0.3 milligram epinephrine. Spinal anesthetic is administered in lumbar space in sitting position. Then patients are located in supine position. Patients will receive 0.01-0.03 milligram/kilogram midazolam as sedative. These parameters will be measured 5, 10, 20, 30, 60, 90, 120 minutes after spinal and in post anesthesia care unit: sensory block level will be evaluated by pinprick method and time of reaching to the highest level and 4 dermatome backsliding will be evaluated. Motor block level will be evaluated by bromage scale (0= patient is able to move the hip, knee and ankle; 1= patient is unable to move the hip but is able to move the knee and ankle; 2= patient is unable to move the hip and knee but is able to move the ankle; 3= patient is unable to move the hip, knee and ankle) . Heart rate, blood pressure, nausea and vomiting, apnea, shivering and suffering from pain during surgery and in post anesthesia care unit are recorded and will be treated.