I'm not sure what you mean by "the generic version". Fentanyl _is_ the generic name (the brand name is Fentora (plus a bunch of brand names for patches). Bupre

I'm not sure what you mean by "the generic version". Fentanyl _is_ the generic name (the brand name is Fentora (plus a bunch of brand names for patches). Buprenorphine and fentanyl are _very_ different drugs.