Lightheadedness, nervousness, apprehension, euphoria, confusion, dizziness, drowsiness, tinnitus, blurred vision, diplopia, nausea, vomiting, sensations of heat, cold or numbness, urinary retention, circumoral paraesthesia, paraesthesia, hyperacusis, twitching, tremors, convulsions, unconsciousness, resp depression &/or arrest, agitation, tongue numbness, difficulty swallowing, slurred speech; bradycardia, hypotension, CV collapse which may lead to cardiac arrest; maternal hypotension; spinal block of varying magnitude (including total spinal block), hypotension secondary to spinal block, loss of bladder, bowel control, perineal sensation & sexual function; persistent motor, sensory &/or autonomic (sphincter control) deficit; backache & headache; paresis, paraplegia, neuropathy, peripheral nerve injury, arachnoiditis; inadvertent subarachnoid inj may lead to CNS depression, resp arrest & CV collapse; cutaneous lesions, urticaria, oedema or anaphylactoid reactions.