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?

Giovanni Allevi, pianist and composer, shared in an interview with Repubblica his experience with multiple myeloma, diagnosed ...

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.

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

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 ...

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 ...

After an initial treatment, the overdose victim should be taken to a hospital; Narcan’s reversal effects are temporary — and an increased dose of it is often required for fentanyl overdoses.

Venous fentanyl concentrations were determined for up to 180 minutes and pain scores were recorded up to 240 minutes postdose. Duration of effect and time to rescue medication were also recorded.