Which drug class can prolong nondepolarizing neuromuscular blockade?

Which drug class can prolong nondepolarizing neuromuscular blockade?

• A. Calcium Channel Blockers
• B. Beta-Blockers
• C. ACE Inhibitors
• D. NSAIDs

Answer: (A)

Potentiation of nondepolarizing neuromuscular blockade happens when acetylcholine at the neuromuscular junction is made less available or when the receptors are more easily blocked. Calcium channel blockers reduce calcium entry into the nerve terminal, which is needed for acetylcholine release. With less acetylcholine being released, the nondepolarizing blocker has less competition at the nicotinic receptors, so the blockade lasts longer and is deeper. That’s why this drug class can prolong the effect of nondepolarizing neuromuscular blockers. The other listed drug classes don’t reliably decrease acetylcholine release at the NMJ, so they don’t have the same impact on prolonging the blockade. In practice, monitor neuromuscular function and be prepared to adjust dosing or use reversal as needed.

Potentiation of nondepolarizing neuromuscular blockade happens when acetylcholine at the neuromuscular junction is made less available or when the receptors are more easily blocked. Calcium channel blockers reduce calcium entry into the nerve terminal, which is needed for acetylcholine release. With less acetylcholine being released, the nondepolarizing blocker has less competition at the nicotinic receptors, so the blockade lasts longer and is deeper. That’s why this drug class can prolong the effect of nondepolarizing neuromuscular blockers. The other listed drug classes don’t reliably decrease acetylcholine release at the NMJ, so they don’t have the same impact on prolonging the blockade. In practice, monitor neuromuscular function and be prepared to adjust dosing or use reversal as needed.