| Benzocaine: |
Methaemoglobinaemia (modification of the normal blood pigments), restlessness, excitement, nervousness, dizziness, tinnitus (ringing in the ears), blurred vision, nausea and vomiting, muscle twisting and tremor and convulsions (seizures). Numbness of the tongue and perioral region may appear as an early sign of systemic intoxication. Excitation may be transient, and followed by depression with drowsiness, respiratory failure and coma. There may be simultaneous effects on the cardiovascular system with myocardial depression and peripheral vasodilatation resulting in hypotension and bradycardia, arrhythmias and cardiac arrest may occur. |