So the court doesn't consider it cruel or unusual punishment:
WASHINGTON — The Supreme Court ruled on Monday against three death row inmates who had sought to bar the use of an execution drug they said risked causing excruciating pain.
Justice Samuel A. Alito Jr. wrote the majority opinion in the 5-to-4 decision. He was joined by the court’s four more conservative justices.
The drug, the sedative midazolam, played a part in three long and apparently painful executions last year. It was used in an effort to render inmates unconscious before they were injected with other, severely painful drugs.
Four condemned inmates in Oklahoma challenged the use of the drug, saying it did not reliably render the person unconscious and so violated the Eighth Amendment’s ban on cruel and unusual punishment. Lower courts disagreed.
Oklahoma and several other states started to use midazolam in executions after manufacturers in Europe and the United States refused to sell them the barbiturates that were traditionally used to produce unconsciousness.
Lawyers for the Oklahoma inmates, with the support of experts in pharmacology and anesthetics, said midazolam, even if properly administered, was unreliable. They pointed to three executions last year that seemed to go awry.
In April 2014, Clayton D. Lockett regained consciousness during the execution procedure, writhing and moaning after the intravenous line was improperly placed. In Ohio in January 2014 and in Arizona in July, prisoners appeared to gasp and choke for extended periods.