In a bombshell exclusive, The ENQUIRER has obtained a shocking video of long troubled actor Tom Sizemore getting high on hardcore drugs and making offensive racial remarks.

The 23-minute video was secretly filmed by a pal in late 2013 and shows the 52-year-old father of two using

both heroin and crystal meth in the bathroom of his Los Angeles home.

While high on the drugs, Sizemore – who has battled addiction since he was 15 – takes a potshot at Hispanics as well as Oscar winner Oliver Stone, claiming the director partied with prostitutes while filming “Born on the Fourth of July” in 1989.

Sizemore’s substance abuse troubles are the stuff of Hollywood legend. He’s been arrested and in and out of

rehab several times over the past two decades. Although he claims he got clean after a 2010 stint on “Celebrity Rehab with Dr. Drew,” the video is proof that Sizemore “still hasn’t licked his drug demons,” said an eyewitness.

In the video, Sizemore is seen sitting on the toilet, speaking to a friend. “The bathroom is Tom’s drug den,” the eyewitness continued. “First, he used heroin, which was on his bathroom sink, wrapped in foil. He lights it with a cheap lighter placed under the foil and uses a straw to inhale the smoke. “A couple minutes later, he’s ready to use the crystal meth, which he smokes through a glass pipe.

“You can tell Tom is not well – he’s sweating profusely in the video.”

Also disturbing are the remarks the actor makes about Mexican men, saying they’re all “dirty and brown and smell like fertilizer – they want to rob you and kill you and that’s it.”

Sizemore goes on to call Oliver Stone – an acknowledged past drug abuser – a “lost cause.” “Tom says Stone used ‘speed, heroin, everything… it’s torn him up.’

“Tom worked for Stone in ‘Fourth of July.’ It was one of his earliest film appearances. Tom said that when they were shooting in the Philippines, Stone took some of the actors to a whorehouse to party with hookers.”

Sizemore adds that the movie’s star, Tom Cruise, did not participate.

In a recently published memoir, “By Some Miracle I Made It Out of There,” Sizemore refers to himself as a “hope-to-die addict” who struggled with addiction throughout his teen years.

Despite his drug problems, Sizemore became one of Hollywood’s most sought-after supporting actors in the ’90s and early 2000s, starring in “Saving Private Ryan,” “True Romance,” “Ntural Born Killers,” “Black Hawk Down” and “Heat.”

He married actress Maeve Quinlan in 1996, but divorced three years later due to his drug use. And things went downhill from there. In 2003, Sizemore was convicted of assault and battery on his then girlfriend, former “Hollywood Madam” Heidi Fleiss.

In 2007, while on probation for a previous drug conviction, he was arrested in Bakersfield, Calif., for possession of meth and sentenced to 16 months in prison. Two years later, he was arrested again on an outstanding warrant for drug charges and later released.

Sizemore, who has twin 8-year-old boys, Jagger and Jaedon, with ex-girlfriend Janelle McIntire, appeared on the third season of VH1’s “Celebrity Rehab.” The following season, he made a guest appearance on the show and stated that he’d been sober for 14 months.

While he has stayed busy with work, appearing in TV series such as “Hawaii Five-O” and in films including “Seal Team Eight” and “Paranormal Movie,” Tom’s personal life has clearly taken a turn for the worse.

“The world should see this video because maybe then Tom will realize he’s killing himself with drugs and clean himself up for good,” added the eyewitness. “My plea to Tom is, ‘Get help now before you end up dead.’”