The most appropriate combination of drugs, in terms of a stable heart rate, during reversal of nondepolarizing neuromuscular blockade is which?

The most appropriate combination of drugs, in terms of a stable heart rate, during reversal of nondepolarizing neuromuscular blockade is which?

• A. Edrophonium and glycopyrrolate
• B. Edrophonium and atropine
• C. Neostigmine and atropine
• D. Pyridostigmine and atropine

Answer: (B)

When reversing a nondepolarizing neuromuscular blocker, you increase acetylcholine at muscarinic receptors. That can slow the heart and cause other parasympathetic effects, so an antimuscarinic is given to keep the heart rate stable. Edrophonium is a short-acting acetylcholinesterase inhibitor, so its reversal effect wears off relatively quickly. Pairing it with atropine, a potent antimuscarinic with rapid cardiac protection, provides immediate counteraction of muscarinic effects right at the moment of reversal and minimizes the chance of a bradycardic drift as the drug effect fades. This combination yields a smoother emergence with a more stable heart rate. Using longer-acting reversal agents like neostigmine or pyridostigmine would typically require a longer-acting antimuscarinic as well, such as glycopyrrolate, which can extend anticholinergic effects and lead to longer or more variable heart-rate changes. Hence, the pairing of edrophonium with atropine best supports stable heart rate during reversal.

When reversing a nondepolarizing neuromuscular blocker, you increase acetylcholine at muscarinic receptors. That can slow the heart and cause other parasympathetic effects, so an antimuscarinic is given to keep the heart rate stable. Edrophonium is a short-acting acetylcholinesterase inhibitor, so its reversal effect wears off relatively quickly. Pairing it with atropine, a potent antimuscarinic with rapid cardiac protection, provides immediate counteraction of muscarinic effects right at the moment of reversal and minimizes the chance of a bradycardic drift as the drug effect fades. This combination yields a smoother emergence with a more stable heart rate.

Using longer-acting reversal agents like neostigmine or pyridostigmine would typically require a longer-acting antimuscarinic as well, such as glycopyrrolate, which can extend anticholinergic effects and lead to longer or more variable heart-rate changes. Hence, the pairing of edrophonium with atropine best supports stable heart rate during reversal.