Which reversal agent reverses benzodiazepines in veterinary emergencies?

• A. Flumazenil
• B. Naloxone
• C. Atipamezole
• D. Yohimbine

Answer: (A)

Reversing benzodiazepine effects relies on a specific antagonist that binds to the same site on the GABA-A receptor, blocking the drug’s action. The agent that does this is flumazenil, which competitively binds at the benzodiazepine binding site and displaces the benzodiazepine, rapidly reversing sedation, ataxia, and other CNS depressant effects.

Keep in mind flumazenil has a relatively short duration of action, so re-sedation can occur if the benzodiazepine is longer-acting or if additional doses are needed. Monitor the patient and be prepared for possible repeat dosing. Also note that withdrawal or seizures can occur in certain patients with chronic benzodiazepine use.

In contrast, naloxone reverses opioids, not benzodiazepines; atipamezole reverses alpha-2 agonists like medetomidine/dexmedetomidine; and yohimbine reverses xylazine.