Lamar Odom fighting for his life ...

Former NBA star Lamar Odom was clinging to life Tuesday night after he was found passed out and unable to breathe on the floor of a Nevada brothel Tuesday, the owner told the Daily News.

Odom, who had been partying with the women for days, had been using an herbal substitute for Viagra, though it was not immediately clear if the supplement affected his condition.

Odom was staying at the Love Ranch Vegas in Crystal, Nevada, one of the establishments owned by famed brothel owner Dennis Hof. Odom was vomiting but with "some kind of foam stuff coming out of his mouth," Hof said.

The 6-foot-10 former hoopster was found passed out by two employees, Ryder Cherry and Madison, shortly after 3 p.m. local time, Hof said.

"This is serious," Hof told The News. "He might not make it."

Odom was taken to the Desert View hospital in Pahrump before being transported to Sunrise Hospital in Las Vegas. He could not be flown to the hospital because of his "stature," the Nye County Sheriff's Office said in a statement.

Hof said it was the first time he'd ever seen Odom at the cathouse.

Odom, a Queens native, had been at the brothel since Saturday night. A source said he had been drinking during his stay, but not much. A bottle of Cognac was still a 1/3 full.

Hof said Odom had taken “upwards of 10 herbal Viagras.”

“There was obviously a problem," Hof said. “He was puking a bunch of ugly stuff."

It was not clear if Odom, who had been in rehabilitation before, was using any drugs.

“He was in great shape, having a good time,” Hof said, after speaking with several of the women there. “Just enjoying some solitude.”

“The girls said he was a great guy who was just happy to have some time by himself. There was nothing weird, he was perfectly fine and he was happy to get away from people for a few days"

"The girls said he seemed a little bit solemn on Sunday."

After Odom was found unconscious, a call was placed to 911, and an operator advised them not to give him CPR.They were told, instead, to turn him over on his side, which was when they saw foam coming from his mouth.

Odom was recently divorced from reality star Khloe Kardashian. He was an NBA star for the Los Angeles Lakers, the Miami Heat and the Dallas Mavericks before retiring amid rumors of drug use. Knicks president Phil Jackson signed Odom briefly, but he never suited up for the team.

Courtesy of JASON SILVERSTEIN, LEONARD GREENE 

NEW YORK DAILY NEWS Updated: Today, 10:23 PM ET