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Flumazenil for benzodiazepine sedation reversal — ORE Part 1 MCQ

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HardDental Pharmacology and TherapeuticsFlumazenil for benzodiazepine sedation reversalORE Part 1

An adult undergoing intravenous midazolam sedation becomes markedly drowsy after treatment, with a reduced respiratory rate. Airway manoeuvres, high-flow oxygen and verbal stimulation have been provided, but respiratory depression persists. There is no history of long-term benzodiazepine use, epilepsy treated with benzodiazepines, or co-ingestion of other drugs. What is the most appropriate next step?

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Correct answer: E — Give intravenous flumazenil and continue respiratory support

Explanation lettering: D = shown as A · A = shown as B · E = shown as D · B = shown as E

B is correct. Persistent respiratory depression following midazolam, despite basic airway measures and oxygen, requires continued airway and ventilatory support plus intravenous flumazenil, the specific benzodiazepine antagonist. Flumazenil reverses benzodiazepine sedation and may restore spontaneous respiration, but observation must continue because re-sedation and recurrent respiratory depression can occur. The added exclusions make clinically important contraindication scenarios, such as chronic benzodiazepine exposure, benzodiazepine-treated epilepsy and mixed overdose, unlikely. A would worsen benzodiazepine-induced respiratory depression. C is neither an antidote nor suitable for an acute respiratory emergency. D is used for selected hypoglycaemic emergencies or beta-blocker toxicity, not benzodiazepine reversal. E is unsafe because respiratory depression has persisted despite initial support.

Reference: Electronic Medicines Compendium. Flumazenil 100 micrograms/ml solution for injection/infusion: Summary of Product Characteristics, sections 4.1, 4.2 and 4.4, 2022. https://www.medicines.org.uk/emc/product/6300/smpc