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有硫喷妥钠（犯人），泮库溴（犯人肌肉）和氯化钾（停止犯人心跳）。