Select the correct statement regarding the effects of volatile anesthetics on nondepolarizing neuromuscular blocking drugs and the reversal agents.

Select the correct statement regarding the effects of volatile anesthetics on nondepolarizing neuromuscular blocking drugs and the reversal agents.

• A. Volatile anesthetics potentiate neuromuscular blockade but retard reversal agents
• B. Volatile anesthetics potentiate both neuromuscular blocking drugs and reversal agents
• C. Volatile anesthetics retard both neuromuscular blocking drugs and reversal agents
• D. Volatile anesthetics retard neuromuscular blocking drugs but potentiate reversal agents

Answer: (A)

Volatile anesthetics amplify the effect of nondepolarizing neuromuscular blocking drugs at the motor end plate while also making reversal by acetylcholinesterase inhibitors less effective. They decrease acetylcholine release from the presynaptic nerve terminal and partly depress postsynaptic responsiveness at the nicotinic receptor, so the same amount of NMBA produces a deeper block. reversal agents work by increasing acetylcholine to outcompete the blocker, but under volatile anesthesia the combined presynaptic and postsynaptic depressant effects blunt this competition, leading to slower or less complete recovery. In practice, this means shorter blocks are deeper and harder to reverse under volatile anesthesia, compared with awake or non-volatile conditions.

Volatile anesthetics amplify the effect of nondepolarizing neuromuscular blocking drugs at the motor end plate while also making reversal by acetylcholinesterase inhibitors less effective. They decrease acetylcholine release from the presynaptic nerve terminal and partly depress postsynaptic responsiveness at the nicotinic receptor, so the same amount of NMBA produces a deeper block. reversal agents work by increasing acetylcholine to outcompete the blocker, but under volatile anesthesia the combined presynaptic and postsynaptic depressant effects blunt this competition, leading to slower or less complete recovery. In practice, this means shorter blocks are deeper and harder to reverse under volatile anesthesia, compared with awake or non-volatile conditions.