The claim: Fentanyl smells like popcorn when burned.
An April 12 Facebook post suggests fentanyl, a synthetic opioid up to 100 times stronger than morphine, has a distinct smell when it's burned.
"When FENTANYL burns it smells like popcorn," reads the post. "If your weed smells like popcorn, stop! It could save your life."
Our rating: False
Multiple experts told USA TODAY fentanyl is odorless and isn't detectable in other drugs without test strips or similar tools. There is no evidence fentanyl has a noticeable smell when it's burned, but an expert said it's possible other substances mixed with fentanyl could sometimes produce a smell.
Fentanyl has no detectable odor
Fentanyl is odorless and tasteless, and it "cannot be detected without chemical detection tools, such as fentanyl test strips," Dr. Holly Geyer, an addiction specialist at Mayo Clinic in Scottsdale, Arizona, told USA TODAY.
Dr. Lewis Nelson, who chairs the emergency medicine department at Rutgers New Jersey Medical School, said in an email that there's no evidence fentanyl has a noticeable smell when it's burned.
"It is nearly impossible to tell if drugs have been laced with fentanyl unless you test your drugs with fentanyl test strips," the agency's website says.
"This property can be highly dangerous as drug dealers might mix fentanyl powder with another drug like heroin or cocaine, and users are not aware until they become intoxicated," the network's website says.
JUST SAY NO !!!!! Don't Do Drugs!!!! no matter what it smells like!