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).

一用的混合针剂含有硫喷妥钠（麻犯人），泮库溴铵（麻痹犯人肌肉）和（停止犯人心跳）。