A patient on beta-blocker therapy is undergoing anesthesia induction with fentanyl. Which muscle relaxant is best avoided in this situation?

Explanation

Pancuronium should be avoided in patients receiving beta-blockers because it can cause tachycardia and hypertension by blocking vagal effects, which may exacerbate cardiovascular side effects. Other muscle relaxants like rocuronium, vecuronium, and atracurium have minimal cardiovascular effects and are safer choices in this context.