- New York City Department of Health and Mental Hygiene. "Unintentional Drug Poisoning (Overdose) Deaths Involving Opioids in New York City, 2011-2014." New York City, NY: New York City Department of Health and Mental Hygiene. Unintentional Drug Poisoning (Overdose) Deaths Involving Opioids in New York City, 2011-2014.pdf1.24 MB