The cocktail used generally contains sodium thiopental (to anaesthetise the condemned man), pancuronium bromide (to paralyse his muscles) and potassium chloride (to stop his heart).

一般注射用的混合针剂含有硫（麻犯），溴铵（麻痹犯肌肉）和氯化钾（停止犯心跳）。