The mechanism of action is associated with increased inhibitory effect of GABA in the CNS. Muscle relaxant effect is also due to the After I.M. injection of diazepam may increase the activity of CK in the blood plasma (which should be considered in the differential diagnosis of myocardial infarction). Avoid IA injection.
Least from the standpoint of the basic mechanisms of drug action. I've often spoken offline about my oral qualifying examination in graduate school where one of my committee members specifically asked me to describe the molecular and physiological action of the three drugs then used in lethal injection.