A client rescued from an enclosed-space fire has soot around the mouth, altered mental status, severe lactic acidosis, and cardiovascular instability. Which action should the nurse anticipate?

• 1 Wait for a measured cyanide concentration before administering antidotal therapy.
• 2 Give methylene blue first and reassess the lactic acidosis before using another antidote.
• 3 Give hydroxocobalamin 5 g IV promptly while supporting airway, breathing, circulation, and seizures. ✓ Correct answer
• 4 Limit supplemental oxygen because the pulse oximetry reading remains within the expected range.

For study reference only. Always follow current clinical guidelines and your institution’s protocols.