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).

一般注射用针剂含有硫喷妥钠（麻犯），泮库溴铵（麻痹犯）和氯化钾（停止犯心跳）。