Fentanyl is so potent and deadly because it crosses blood-brain boundary so easily, binds more effectively to receptors than other

Fentanyl is so potent and deadly because it crosses blood-brain boundary so easily, binds more effectively to receptors than other opioids, binds to so many receptors that it may stop breathing. Read this @FT piece and weep.
ft.com/content/18ed42… https://t.co/Hno3ri3TPz

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