This product is a monoquaternary ammonium steroid medium-acting non-depolarizing muscle relaxant, similar in structure to pancuronium bromide, which blocks the conduction between nerve endings and striated muscles by competing with acetylcholine for nicotinic receptors located at the motor end plate of striated muscles. Unlike depolarizing neuromuscular blocking drugs such as succinylcholine, this product does not cause muscle fiber bundles to tremble. Intravenous injection of 0.08-0.1mg/kg is effective within 1 minute, reaching a peak in 3-5 minutes, and maintaining for 30-90 minutes. The muscle relaxant effect is 3 times stronger than that of tubocurarine chloride; it has no vagus nerve blocking effect. Since vecuronium bromide does not cause an increase in heart rate, it is suitable for patients with myocardial ischemia and heart disease, but the use of vagus nerve excitants and β-receptor blockers is prone to bradycardia. This product has a weak histamine release effect, and there are also bronchospasm and allergic reactions, but they are rare.

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