C.R.S. § 18-1.3-1202: Death penalty inflicted by lethal injection.

The manner of inflicting the punishment of death shall be by the administration of a lethal injection within the time prescribed in this part 12, unless for good cause the court or governor may prolong the time. For the purposes of this part 12, "lethal injection" means a continuous intravenous injection of a lethal quantity of sodium thiopental or other equally or more effective substance sufficient to cause death. The manner of inflicting the punishment of death shall, in all circumstances, be by the administration of a lethal injection regardless of the date of the commission of the offense or offenses for which the death penalty is imposed.