Hypersensitivity to lidocaine HCl monohydrate or amide type anaesth. Patients w/ complete heart block or hypovolaemia. Inflammation or sepsis at proposed inj site & in presence of septicaemia. Patients w/ myasthenia gravis, severe shock or impaired cardiac conduction. Epidural or spinal anaesth in patients w/ uncorrected hypotension; coagulation disorders or receiving anticoagulants; serious diseases of CNS or spinal cord (eg, meningitis, spinal fluid block, cranial/spinal haemorrhage, tumours, poliomyelitis, syphilis, TB or metastatic lesions of spinal cord). Antiarrhythmic use in patients w/ supraventricular arrhythmia; Stokes-Adams syndrome or severe degrees of SA, AV or intraventricular block unless patient has artificial pacemaker. Suppresses ventricular pacemaker activity; may cause ventricular standstill. General CI related to epidural anaesth regardless of local anaesth use.