3 ms·
No it's not. Heroin has only modest blood-brain penetration. Fentanyl has nearly 100% penetration. This difference is what makes fentanyl so much stronger th
by xyzzy21 5y ago
No it's not. Heroin has only modest blood-brain penetration. Fentanyl has nearly 100% penetration. This difference is what makes fentanyl so much stronger than heroin and so much more dangerous. Biochemically it's a different thing - not "just another opiate".
- atdrummond 5y agoHuh? What comment are you referring to? I didn't call fentanyl and similar analogues "just another opiate". (Also, fentanyl is an opiod. It is not a natural opiate. And diacetylmorphine, thanks to its improved lipid solubility compared to morphine, has an approximately 70% brain absorption rate. That's not "modest".) Your reply really confuses me.