Hypersensitivity to bupivacaine HCl or amide-type local anaesth. Active CNS disease eg, meningitis, poliomyelitis, intracranial hemorrhage, subacute combined cord degeneration due to pernicious anemia, cerebral & spinal tumours. Spinal stenosis & active disease eg, spondylitis, TB, tumour or recent trauma eg, vertebral column fracture; septicaemia; pyogenic skin infection at or adjacent to lumbar puncture site; cardiogenic or hypovolaemic shock; coagulation disorders or ongoing anticoagulant therapy.