A patient was admitted epidural anaesthesia with 15 ml of 1.5%. Lignocaine with adrenaline for hernia surgery. He devoled hypotension and respiratory depression within 3 minutes after administration of block. The most common cause would be:
D i.e. Drug has entered the sub arachnoid space
Allergy to drug administered
Systemic toxicity to drug administered
Patient got vasovagal shock
Drug has entered the subarachnoid space