Stronger isn't always better: Nalmefene in community overdose response and the false promise of quick-fix public health solutions.

The United States is in its third decade of a drug overdose crisis. An important tool for responding to this crisis is the opioid overdose reversal agent, naloxone. However, with hyper-potent opioids like fentanyl present in the drug supply, some have argued for alternative overdose reversal agents such as nalmefene, which has higher opioid receptor affinity and a longer half-life. This reasoning moves too quickly. There is little evidence that adopting nalmefene for community-based overdose response will provide overall benefit, and there are good reasons to expect that it will cause substantial harm. Nalmefene appears to promise a "magic bullet" solution to a complicated and terrible problem, but sustainable overdose prevention requires comprehensive improvements to public health infrastructure. The overdose crisis requires attention, effort, and funding more than it needs a novel technological or pharmaceutical intervention.