Used as a neuromuscular blocking agent in anesthesia to facilitate tracheal intubation and provide skeletal muscle relaxation during surgery or mechanical ventilation. It works by competitively inhibiting acetylcholine at nicotinic receptors in motor end plates, leading to controlled muscle paralysis. Its long duration of action makes it suitable for prolonged surgical procedures. Due to its minimal cardiovascular effects, it is preferred in patients where hemodynamic stability is critical.