Ever since Ive started doing fentanyl Ive only ever smoked it, and in my area I've only ever met people who IV or smoke it. My question is does anyone know the bioavailability of smoked fentanyl as I can't find that information ANYWHERE. Or at least does anyone how wasteful it is compared to snorting? The fentanyl I get here in Ontario is a powder/hard rocks that instantly melts into a puddle and completley vaporizes within 2-3 seconds. I've never had to "chase" like people do with heroin as you only use a very small amount (50mg is a very decent toke) and its gone so fast I dont think you could even chase it.