There appears to be concerns that execution by lethal injection is very painful and torturous for the condemned. Some may argue that this is not a problem and may be a deserving end. Others may feel we are only as humane as our gravest actions. Either way, death by lethal injection is portrayed as a "Humane" procedure when in fact there is mounting evidence it is not.
"For years defense attorneys and medical experts have warned that midazolam — a sedative often paired with an opioid during minor surgeries — is incapable of rendering a person insensate for the purpose of lethal injection, no matter how high the dose. Without sufficient anesthesia, the second and third drugs are known to be excruciating, creating a sense of suffocation and burning that has been labeled torture."