Ketamine was first developed in 1962. It is on the World Health Organization's List of Essential Medicines, the most important medication needed in a basic health system. It is legally sold under a very wide variety of brand names, including Ketalar.
If the crime you commit (generally just first degree murder) is in a state that does not have the death penalty then the only way you can be executed is if you are tried in a federal court as opposed to a state court.
For Mexico to agree to extradite Mr. GuzmÃ¡n, the United States would most likely have to agree not to prosecute him on capital charges that could subject him to the death penalty. Mexico does not have a death penalty and, as a matter of policy, does not extradite defendants who could face it in another country.