Los Angeles (CNN) -- Actor Jeff Conaway, who was in the TV series "Taxi" and the movie "Grease," died Friday morning, his manager said. 

While pneumonia was the cause of death, the doctor who treated him for drug addiction for years says it was his dependence on prescription painkillers that eventually cost him his life. 

"Jeff was a severe, severe opiate addict with chronic pain, one of the most serious and dangerous combination of problems you could possibly interact with," Dr. Drew Pinsky said during a taping for Friday night's "Dr. Drew" on HLN. 

"The pain seemed to be motivating him back to the opiates, and I told him for years that it was going to kill him," Pinsky said. 

Conaway, 60, suffered from pneumonia and sepsis in recent weeks and had been in a medically-induced coma in an Encino, California, hospital for two weeks, manager Phil Brock said. 

His family surrounded Conaway in his hospital room Thursday afternoon when he was taken off life support, Brock said. 

"He was the consummate performer and entertainer," Brock said. "We're thankful his struggles are over, but we know he will be missed by legions of fans worldwide." 

On hearing about his death, "Grease" co-star John Travolta said: "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." 

Conaway's struggle with alcohol and drug addiction was chronicled in 2008 on the TV reality show "Celebrity Rehab With Dr. Drew." 
What kind of addict was Jeff Conaway?
What kind of drug?
How old was he?
What was his manager's name?
In what state was the hospital Conaway was in?
What city?
Had he suffered from conditions in recent weeks?
Who was around him at the time of his death?
Did a former co-star make a statement about Conaway?
Who?
In what movie did they act together?
In what year was Conaway featured on Dr. Drew's TV show?
What is the name of the show?
What TV show was Conaway known for?
On what day of the week did he die?
What was the official cause of death?
What kind of coma had he been in?
For how long?
Had Conaway been on life support?
What kind of man did Travolta say Conaway was?
drug
 the doctor who treated him for drug addiction
prescription painkillers
it was his dependence on prescription painkillers that eventually cost him his life
60
Conaway, 60, suffered from pneumonia
Phil Brock
manager Phil Brock
California
an Encino, California, hospital
Encino
Encino, California,
pneumonia and sepsis
Conaway, 60, suffered from pneumonia and sepsis
His family
His family surrounded Conaway in his hospital room Thursday afternoon when he was taken off life support, Brock said. 
yes
On hearing about his death, "Grease" co-star John Travolta said: "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." 
John Travolta
Grease" co-star John Travolta 
"Grease"
"Grease" co-star John Travolta
2008
Conaway's struggle with alcohol and drug addiction was chronicled in 2008 on the TV reality show "Celebrity Rehab With Dr. Drew."
"Celebrity Rehab With Dr. Drew."
 "Celebrity Rehab With Dr. Drew."
"Taxi"
 Actor Jeff Conaway, who was in the TV series "Taxi"
Friday
Los Angeles (CNN) -- Actor Jeff Conaway, who was in the TV series "Taxi" and the movie "Grease," died Friday morning, his manager said. 

pneumonia
While pneumonia was the cause of death,
medically-induced coma
 had been in a medically-induced coma
2 weeks
Conaway, 60, suffered from pneumonia and sepsis in recent weeks and had been in a medically-induced coma in an Encino, California, hospital for two week
yes
His family surrounded Conaway in his hospital room Thursday afternoon when he was taken off life support, 
decent man
Jeff Conaway was a wonderful and decent ma