Experience With Dexmedetomidine Use in the Treatment of Dysautonomic Crisis in Familial Dysautonomia: An Off-Label Use.

Familial dysautonomia is a rare genetic neurodevelopmental disorder characterized by episodes of hyperautonomic state known as dysautonomic crises. The features of dysautonomic crises are hypertension, tachycardia, vomiting, sweating, flushing, and behavioral changes. The etiology of such crises is supposed to be a consequence of the inability to control sympathetic overflow due to damage to the afferent neurons carrying baroreceptor inputs to the central nervous system. A 19-year-old male with a known history of familial dysautonomia and frequent dysautonomic crises presented to the Emergency Department with intractable nausea and vomiting for six hours. He was hypertensive and tachycardic on presentation. The patient had tried oral labetalol and clonidine at home with no improvement. In the emergency room, the patient received intravenous labetalol, diazepam, and clonidine which were ineffective. He was then treated with intravenous dexmedetomidine, and his symptoms resolved within a few hours. The patient was discharged home on the same day. The mainstay of treatment for dysautonomic crises is benzodiazepines and clonidine. The use of these treatment modalities has its challenges. Here, we present a case of a dysautonomic crisis that was resistant to the conventional treatment, treated safely and successfully with dexmedetomidine.