Abstract
BACKGROUND: Local anesthesia could result in lethal complications if injected in highly vascularized area. Dentist should take care to avoid such complications. CASE PRESENTATION: We present a case of 15 year old girl with a coma following convulsive status epilepticus which developed after inferior alveolar nerve blockade by a dentist. The patient was admitted to the intensive care unit ICU and recovered within several days. CONCLUSION: This case is reported to tell both of dentists and medical staff that although it is uncommon, such complications of local anesthesia should be in mind to be avoided and managed promptly if happened.