Here is what you need to know about fentanyl, what it's used for, what it does to you, side effects, drug interactions, withdrawal symptoms and why fentanyl is so dangerous. What is fentanyl?

Are dropping fentanyl-related death rates concealing other issues in the fight against this brutal form of addiction?

The US death toll from fentanyl is falling as communities hand out overdose-reversal drug naloxone. Behind the good news, opioids remain rife – and users report harrowing effects from the antidote.

The increasingly “messy drug supply” – especially of illicit fentanyl – is making street drugs more ... had an unfamiliar chemical smell or because they caused unusual side effects, including intense ...

New high-dose naloxone formulations, often twice as strong as the standard 4-mg dose, can cause severe side effects such as vomiting, agitation and pain. A recent study found no difference in ...

NATCHITOCHES, La. – The amount of fentanyl seized Friday in drug arrests in Natchitoches Parish is enough to potentially kill around 476,000 people, roughly 10% of the state’s population ...

The increasingly “messy drug supply” — especially of illicit fentanyl — is making street ... smell or because they caused unusual side effects, including intense headaches or lung pain ...