The order by Clark County District Court Judge Elizabeth Gonzalez delaying the execution marks the first time a pharmaceutical company has succeeded in halting an execution over legal or ethical concerns.
Experts say it would be the first time the opioid fentanyl was used in a US execution.
Brooke Santina, public information officer for the Nevada Department of Corrections, told CNN that it has been advised not to comment on the lawsuit. State officials could appeal right away to the Nevada Supreme Court.
The pharmaceutical company Alvogen filed a challenge on Wednesday, accusing the state of Nevada of surreptitiously obtaining the sedative Midazolam for executions and saying that it did not want the drug used in executions.
Drug maker Alvogen alleges the state illegitimately obtained one of its execution drugs and says that the drug combination proposed is untested.
The judge ruled that based on that letter, Alvogen had a reasonable chance of winning its lawsuit, and she issued the temporary restraining order against the use of the drug. Gonzalez set a hearing in the case for September 10.
The company points to what it called "botched" executions in other parts of the country where their drug has been used. The first attempt-by a different company in Arkansas-failed previous year.
Death penalty states have been forced to find different cocktails of drugs for executions in the face of opposition from manufacturers to having their medicines used in lethal injections. "But the company did not immediately ask to formally join Alvogen's lawsuit", The Associated Press reported.
The midazolam would be used to sedate Dozier before he is killed using fentanyl, a drug at the forefront of the United States opioid epidemic that was also allegedly obtained illicitly. But the state has refused. Fentanyl, a synthetic opioid well known for its role in the opioid epidemic, has "never been used in an execution before".
Jordan T Smith, an assistant Nevada solicitor general, countered at Wednesday's hearing that Nevada did not put up a "smokescreen" or do anything wrong in getting the drugs.
Todd Bice, an attorney representing Alvogen said the company's lawsuit was not about the constitutionality of the death penalty nor whether Dozier deserved the death penalty - it had exclusively to do with business.
Alvogen said that Nevada law is clear that it is an offence to obtain a controlled drug "by misrepresentation, fraud, forgery, deception, subterfuge or alteration".
The sedative is meant to render the inmate unconscious before he is administered the synthetic opioid fentanyl and then paralytic agent cisatracurium. Fentanyl is used to slow the heart rate, sedate and continue to suppress breathing, and finally Cisatracurium to paralyze the inmate before death.
Mr Bice said that Alvogen does not take a position on the death penalty itself but opposes the use of the drug in a way that is fundamentally contrary to the drug's objective - saving and improving patients' lives.
In court papers, Alvogen also cited instances in Alabama, Arizona and Oklahoma in the past few years in which inmates given midazolam were left gasping or snorting, appeared to regain consciousness or took an unusually long time to die. "It's extremely experimental", as Amy Rose of the American Civil Liberties Union puts it.
"Life in prison isn't a life", Dozier told the Las Vegas Review-Journal.
There's a limit to how much artwork and physical exercise a person can do in prison, Dozier said in court hearings and letters to the Las Vegas judge who postponed his execution.
He was convicted of second-degree murder in the Arizona slaying of Jasen "Griffin" Greene and sentenced to 22 years in prison in 2005, before he was brought to Nevada to face charges in Miller's death.
Miller's torso was found on April 25, 2002, in a suitcase that had been dumped in a trash bin at the Copper Sands apartment complex in the 8100 block of West Flamingo Road.
A witness said Dozier used a sledgehammer to break Mr Greene's limbs so the corpse would fit in a plastic storage container.
They argued that the untried three-drug combination would be less humane than putting down a pet.
Claire McCaskill opposed Gorsuch and her approval rating had dropped "in a state that President Trump won by a 20-point margin". Wade wasn't going to make or break her vote: "It's not as if those are the only matters that come before the Supreme Court".
The three Royal Thai Navy SEAL divers and medics who stayed in the cave with the boys and coach since they were located on July 2. Thailand's prime minister, Prayuth Chan-o-cha, said the boys were given anti-anxiety medication to help with their rescue.
Its maximum speed will reach more than 10 kilometers per second (36,000 kilometers, or almost 22,370 miles, per hour). It will orbit Earth in expanding ellipses and, about two months later, cross into the moon's orbit.
This has been identified as the same type of nerve agent that contaminated both Yulia and Sergei Skripal . Dawn Sturgess , a mother of three, died on Sunday evening the Met said in a statement shortly before 10pm.
Jones, who fought back after some initial hesitation, told the woman to "watch out" before punching Ragin. During the course of the fight Ragin also struck a companion of Jones, causing an injury to her hand.
Based on what he's put on tape, production and athletic testing, Beal could potentially go in the second round of a normal draft. Mississippi State safety Brandon Bryant has speed and leaping ability and could easily make an early impact on special teams.
Crocodiles are farmed for their meat and hides, but large and battle-scarred crocs are usually unsuitable for the handbag market. The caption warned: "Large crocodiles can move around Top End waterways undetected and you should always Be Crocwise".
The Houston Astros won Tuesday's game against the A's in ridiculous fashion , but it wasn't all smiles for the AL West leaders. The Houston Astros have optioned reliever Ken Giles to Triple-A Fresno, a night after he appeared to curse at manager A.J.
Eight boys rescued from flooded Thai caves, now up to 'rain god'
But the death of a former Thai Navy SEAL diver who ran out of oxygen in the cave on Friday underscored the danger of the journey. Thirteen foreign divers and five members of Thailand's elite navy SEAL unit make up the main team guiding the boys to safety.
Samsung Galaxy X Smartphone Arriving Before Galaxy S10?
Recent reports have revealed that the company will speed up the launch of the Galaxy S10 to unveil the Galaxy X shortly after. The wide-angle snapper is expected to have a 16 MP sensor with a f/1.9 lens on top and a super-wide 123° Field of View.