Don’t Overestimate Your Heroin Tolerance – It Might Be the Last Thing You Do

You may have heard about fentanyl, a synthetic opioid similar to morphine. What you may not have heard about, however, is the ultra-potent concentrated version of it: carfentanil. What We Know About Carfentanil Developed in the mid-1970s as a tranquilizer for large animals such as elephants and hippos, carfentanil is 10,000 times more potent than…

The bulk of the heroin sold on our streets is now being laced with carfentanil.
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