Vignocaine Viscous Adverse Reactions

Drowsiness is usually an early sign of high blood level of lignocaine and may occur as a consequence of rapid absorption. Lignocaine may associate with increased risk of neurotoxic complications when used as spinal anaesthesia. Signs of cerebral ataxia have been reported with topical use of lignocaine for endoscopy.
Undesirable effect on CNS can be excitatory and/or depressant and may be characterized by nervousness, light-headedness, apprehension, euphoria, confusion, drowsiness, dizziness, tinnitus, blurred or double vision, vomiting, sensations of heat, cold or numbness, twitching, tremors, convulsions, unconsciousness, respiratory depression and arrest.
Cardiovascular may depress and characterize by bradycardia, hypotension, cardiovascular collapse which may lead to cardiac arrest.
Allergic reactions as a result of sensitivity to lignocaine are extremely rare and are characterized by cutaneous lesions, oedema, urticaria or anaphylactoid reactions.