Why the study?
Recurring fentanyl use contributes significantly to opioid-related deaths, but the physiological impact of repeated opioid use on breathing remains poorly understood.
The study identifies physiological changes in the preBötzinger complex following repeated fentanyl use, advancing the understanding of susceptibility and tolerance in opioid overdose.
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May warrant caution with repeated fentanyl dosing; hypothesis-generating for preBötzinger adaptations in ventilatory tolerance.
Recurring fentanyl use is a significant factor contributing to opioid-related deaths, yet the physiological impact of repeat opioid use on breathing remains poorly understood. This study demonstrates that divergent ventilatory responses to opioids emerge following repeated fentanyl administration. These responses coincide with changes in oxygen consumption and inspiratory rhythmogenesis from the preBötzinger complex. These observations advance an understanding of the physiological basis for susceptibility and tolerance among individuals likely to succumb to opioid overdose.
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Nwakudu et al. (2025) studied this question.
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