This isn’t exactly new, but worth revisiting–many of the Heroin OD deaths had some other stuff on board–even just alcohol.
There are additive effects of central nervous system depressants.
I did my internship at Harlem Hospital, and many of my patients during that year were declared heroin users, casual weekenders or more serious–another thing to know is that the heroin withdrawal drama that the media and movies portray is BS–heroin withdrawal is like a case of the itchy flu. Frank Sinatra in the movie Man with the Golden Arm was an exaggeration.
Theodore Dalrymple is a writer and retired psychiatrist who was a prison psychiatrist and low down community psychiatrist in a British working class neighborhood. He is a prolific and insightful man on culture, crime, lots of things. A renaissance man indeed.
Dalrymple wrote a very insightful book on opiate use (morphine, opium, heroin, hydrocodone, hydromorphone. . . ) called Romancing Opiates: Pharmacological Lies And The Addiction Bureaucracy (2006) ISBN 1-59403-087-1
The book was published in the U.K. as Junk Medicine: Doctors, Lies and the Addiction Bureaucracy ISBN 1-905641-59
You got to love the man, he debunks so many sacred canards of the left.
In the book he he emphasized that drug use is a symptom of the lifestyle, not the cause of the lifestyle, and that addictionology is something of a scam. No kidding, considering that their main tools seem to be substituting one drug for another.