Arizona is having trouble getting pharmaceutical companies to provide some of the drugs used to execute criminal and is considering asking the families of the condemned to help provide the necessary drugs in the requisite doses.
Having worked in the medical device industry for a few years, I can assure you they the function of the FDA is to assure the public that absolutely nothing ever gets to market and here's one more example, accomplishing the same thing by using lawyers.
The obvious solution to this is to deal the medical professionals, lawyers, and government agency busybodies out of the process, and bring in an engineer. Group A above consists of the people who made Obamacare what it is today, and group B is the folks who brought you the self-loading pistol. Either device will get you to the same place, but face it, the pistol is faster and much cheaper.
To avoid a messy cleanup, borrow a page from Pol Pot who executed most of his 2 million with a plastic bag and a rubber band. Flood the bag with Nitrogen, and the process becomes quick, quiet, cheap, non-toxic, and painless. The condemned even gets to leave a pretty corpse for the undertaker.