Severity of adverse effects in CNS and CVS are directly related to blood levels of lidocaine; the effects are more likely to occur after systemic administration rather than infiltration; dizziness; muscle twitching; local anaesthetic of mouth/throat impairs swallowing and increases the risk of aspiration (patients cautioned against eating or drinking for 3-4 hr after anaesthesia); transient effect on auditory system of neonate; erythema; pigmentation; pain; headache; palpitations; local necrosis; pulmonary oedema; hyperglycaemia; bradycardia; reduced cardiac output; anxiety. Epidural may cause hypotension, bradycardia, nausea and vomiting. Intraoral inj may cause stress reactions such as diaphoresis, palpitation, hyperventilation, generalised pallor and faintness....