Final answer:
d-tubocurarine can prolong the effect of succinylcholine by blocking the action of acetylcholine and preventing muscle contraction.
Step-by-step explanation:
Succinylcholine, also known as suxamethonium, is a neuromuscular-blocking drug that is used in anesthesia to induce muscle relaxation, particularly during intubation or surgery. It has a rapid onset of action and a short duration, making it suitable for certain medical procedures. However, it's important to note that succinylcholine has potential side effects and contraindications that should be considered.
The agent that can prolong the effect of succinylcholine is d-tubocurarine. It competitively blocks the action of acetylcholine, preventing it from initiating muscle contraction. When applied to the end-plate of a muscle fiber, d-tubocurarine causes muscle relaxation and paralysis.