A healthy, 23 year old patient experiences a warm sensation, diaphoresis, nausea, light headedness and then loses consciousness approximately 30 seconds following the injection of 1.8ml of 2% lidocaine with 1:100,000 epinephrine for an inferior alveolar nerve block. What is the most likely diagnosis for his situation?
Syncope.
Allergic reaction.
Overdose of local anesthetic.
Intravascular injection.
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