The cause of former child star Adam Rich's death five months ago was revealed Friday to have been an accidental fentanyl overdose.

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The Los Angeles County Medical Examiner's Office said Rich also had non-toxic levels of alcohol and lorazepam or the generic form of Ativan in his system at the time of his death.

The 54-year-old Eight is Enough alum's body was found in a mild state of decomposition in his home in January.

Rich's once-bright career had been eclipsed by years of substance abuse and minor brushes with the law such as driving under the influence and smashing a pharmacy window to obtain drugs in the 1990s and 2000s.

His TV credits included Code Red, Love Boat, CHIPS, Dungeons & Dragons, Small Wonder, St. Elsewhere, Dickie Roberts: Former Child Star and Baywatch.