Jeff Conaway's Death Ruled Accidental

An autopsy has revealed the cause of death for Taxi and Grease star Jeff Conaway, who passed away at age 60 last May.

The actor, who publicly struggled with addiction, died from a major internal infection, the Associated Press reports.

INSIDE STORY: Dr. Drew on Jeff Conaway's Treatment

Although Jeff Conaway, who died on Friday at the age of 60, often spoke of his longtime battle with drug and alcohol addiction, he “was a terribly complex case with chronic pain, opiate addiction and severe childhood trauma,” says Dr. Drew Pinsky, who had worked with the actor over the past few years.

Conaway’s family has waived their HIPAA privacy rights, to allow Dr. Pinsky to talk to PEOPLE about Conaway’s medical history.

John Travolta & Marilu Henner Remember Costar Jeff Conaway

The death of Jeff Conaway at age 60 on Friday prompted two of his onetime costars, John Travolta and Marilu Henner, to remember him fondly.

“Jeff Conaway was a wonderful and decent man and we will miss him. My heartfelt thoughts are with his family and loved ones at this very difficult time,” Travolta, 57, told PEOPLE.

Jeff Conaway Dies at Age 60

Jeff Conaway, the long-troubled actor from Grease and TV’s Taxi who waged a public battle with cocaine, painkillers and alcohol, died Friday at age 60.

The Celebrity Rehab alum had been in a medically induced coma in critical condition after he was found unconscious earlier this month.

Jeff Conaway Visited by His Ex-Girlfriend Night Before He Collapsed

Late at night on May 9, Jeff Conaway’s on-again, off-again girlfriend Victoria Spinoza visited him at the San Fernando Valley home where he was staying with a pal.

According to her best friend Aubry Fisher, Spinoza left Conaway with a hug and told him she’d see him the next day to take him to a doctor’s appointment. When she called that morning, Conaway didn’t answer.

Spinoza went to the house and the friend couldn’t wake Conaway. “That’s when Vikki called 911,” Fisher tells PEOPLE.

Dr. Drew: We All Need to Pray for Jeff Conaway

Jeff Conaway needs all the help and well-wishes he can get, according to Dr. Drew Pinsky.

The former Taxi actor, who was hospitalized earlier this week, is “not doing well today suddenly,” Pinsky Tweeted Saturday evening. The doctor later described Conaway’s state as “tenuous.”

Pinksy – who previously worked to help Conaway with his addiction to cocaine, painkillers and alcohol on Celebrity Rehab – visited the actor Friday.

Comatose Jeff Conaway Struggles to Stay Alive

After a long history of health problems and addiction, Taxi star Jeff Conaway fell into a coma a week ago in Los Angeles.

The latest crisis for the troubled actor, 60, came as a surprise to those closest to him.

“He seemed fine early last week,” his manager of eight years, Phil Brock, told PEOPLE on Thursday. “He had spoken with his agent and his management team and even attended an autograph signing. He really seemed in fine spirits.”

Jeff Conaway, Taxi Star, Hospitalized After Possible Overdose

Celebrity Rehab alum Jeff Conaway is back in the hospital following an apparent overdose.

The Taxi star, 60, who has had a longtime public battle with cocaine, painkillers and alcohol, is in critical condition at Encino Hospital Medical Center unconscious with pneumonia, according to the Los Angeles Times.

Report: Jeff Conaway Injured in Fall at Home

Actor Jeff Conaway, who played Kenickie in the 1978 movie Grease, was badly injured in a fall at his California home on Monday, according to reports.

Conaway, 59, fell down a staircase and suffered a broken hip, a broken arm, a fractured neck and a brain hemorrhage, according to, based on information from his girlfriend, Vikki Lizzi.

He was rushed to hospital for surgery. No other details are currently available.