Dexamethasone Antiemetic Mechanism — FRCA Primary MCQ
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Correct answer: C — A transient rise in blood glucose concentration
The best answer is “A transient rise in blood glucose concentration”. Dexamethasone can increase blood glucose and this is relevant when it is used for postoperative nausea prophylaxis in a patient with diabetes. It does not reverse neuromuscular block or opioid respiratory depression, and it does not acutely lower potassium or reduce volatile-agent MAC.
Reference: Dexamethasone 1 mg tablets, Summary of Product Characteristics: https://www.medicines.org.uk/emc/product/15864/smpc