The rapper was suffering from heart disease and asthma at the time of his death.
The was due to the effects of fentanyl, heroin and methamphetamines, his manager confirmed to CBS News.
Coolio, whose real name was Artis Leon Ivey Jr., died last September in Los Angeles. He was 59.
At the time of his death, the rapper was suffering from heart disease and asthma and had recently used phencyclidine, or PCP, according to the Los Angeles County coroner’s report.