The Nevada Supreme Court is scheduling fast-track oral arguments about the stalled execution of a death-row inmate whose lethal injection is being challenged by pharmaceutical companies that don't want their drugs used.

Three justices on Thursday also granted drug company Sandoz Inc. entry to the case as a "friend of the court" participant at the Sept. 12 hearing.

[RELATED: Nevada high court gets flurry of filings in execution case]

The court panel lifted a temporary hold on legal proceedings in state court in Las Vegas about the twice-postponed execution of Scott Raymond Dozier.

But it was not immediately clear if lower court hearings would be held before the Supreme Court hears from drug companies Alvogen, Hikma Pharmaceuticals and Sandoz.

[RELATED: Nevada appealing twice-delayed execution to state high court]

The makers of a sedative, the powerful opioid fentanyl and a muscle paralytic drug accuse the state of improperly obtaining their products.

Nevada prison officials are telling the state Supreme Court that witnesses reported no complications following Nebraska's execution this week using some of the same drugs Nevada wants to use in a twice-postponed lethal injection.

[RELATED: Nevada prison officials hope Nebraska execution clears path]

Nevada state attorneys argue in a Wednesday court filing that Nebraska's four-drug combination included a sedative, the synthetic opioid fentanyl and a paralytic agent like Nevada plans to use.

Nebraska also used a heart-stopping drug, potassium chloride, in Tuesday's execution of condemned killer Carey Dean Moore.

Witnesses said Moore breathed heavily, turned red and then purple as the drugs were administered.

Two pharmaceutical companies want the Nevada high court to let a lower-court judge decide if the companies can block use of their products in an execution.

[RELATED: Fentanyl maker joins lawsuit to block Nevada execution plan]

The state wants justices to decide a fast-track appeal.

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