Opioid overdose is now the leading cause of death for 18–45-year-olds. And many people don’t realize their drugs are contaminated with fentanyl until it’s too late. Get the facts on fentanyl and learn how to keep you, your family, friends, and others safe from overdose at go.cdph.ca.gov/fentanyl. If you need additional information, or are having difficulty accessing this content, please contact opi@cdph.ca.gov to request this information in an alternate format.