This has the same problem as barbiturates, Legal access. A physician can’t prescribe them, since the intent is to do harm. A pharmacy can’t provide them without a script. Drug companies don’t want to be seen supporting capital punishment. Many drugs companies are European, which is pro life after delivery.Why not propofol? Out like a light, then inject with the fast acting death drug.
in the past they would legally anesthetize the condemned, then stop the heart with potassium salts or paralyze the diaphragm or some other painful death. The problem is they botched the anesthetic part a few times.
Ed pointed out some of the problems getting an IV. I’d add many murderers were junkies and trashed their veins while being criminals. Some have hepatitis or other diseases from the dugs they used to do. At least one person deliberately damaged his veins on death row, in an effort not to die.