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Study decoded · health · sleep · Emerging
Common Diuretic Pill Cuts Opioid-Linked Breathing Pauses In Small Trial
9-person crossover trial22% fewer breathing pauses82% fewer central apneas6-day treatment period
A drug called acetazolamide reduced opioid-related sleep-disordered breathing by 22% compared with a placebo pill, according to a study published August 28, 2026 in the Journal of Applied Physiology.
Nine adults with opioid-associated sleep-disordered breathing, a condition where chronic opioid use slows and destabilizes breathing during sleep, took oral acetazolamide or a placebo pill for 6 days each in a crossover design, with order randomized. On day 4 of each period researchers measured breathing responses to added carbon dioxide while awake, then breathing-control signals during non-REM sleep using a breathing machine, followed by an overnight sleep study. Blood tests confirmed opioid and acetazolamide use in each period. Compared with placebo, acetazolamide reduced overall breathing-pause severity from 32.2 to 25.2 pauses per hour, a 22% drop, and cut central breathing pauses from 5.0 to 0.9 per hour, an 82% drop, with higher oxygen saturation overnight.
The authors attributed this to a fall in plant gain, the sensitivity of the lungs and blood vessels to carbon dioxide changes, from 6.6 to 4.0 mmHg per liter per minute, driven by acetazolamide-induced mild metabolic acidosis. That acidosis raised resting breathing rate from 6.8 to 10.0 liters per minute and lowered resting carbon dioxide from 41.6 to 33.1 mmHg. A separate control measure, controller gain, and the brain's blood vessel response to carbon dioxide did not change.
The trial enrolled only 9 people for 6 days per period. Funding and conflicts were not reported, and the abstract did not report side effects or discontinuations for either period.
Opioids blunt the brain's drive to breathe and make the breathing-control system overreact to small carbon dioxide shifts, producing the pauses and oxygen dips seen in this condition. The authors' finding suggests a drug that nudges blood chemistry toward mild acidity can steady that overreaction without changing the opioid dose itself.
Acetazolamide cut central breathing pauses 82% vs placebo
Data Panel
- Who
- 9 adults with opioid-associated sleep-disordered breathing
- Design
- Randomized, crossover trial comparing oral acetazolamide with placebo, each for 6 days, with measurements on day 4 and an overnight sleep study
- Dose
- Oral acetazolamide for 6 days per period versus placebo for 6 days per period, order randomized
- Primary result
- Apnea-hypopnea index (overall breathing pauses per hour) fell from 32.2 to 25.2 per hour, a 22% reduction; central apnea-hypopnea index fell from 5.0 to 0.9 per hour, an 82% reduction
- Secondary
- Plant gain fell from 6.6 to 4.0 mmHg/L/min; resting minute ventilation rose from 6.8 to 10.0 L/min; resting end-tidal CO2 fell from 41.6 to 33.1 mmHg; controller gain and cerebrovascular CO2 responsiveness were unchanged
- Funding / conflicts
- Not reported in the available record
Nine adults tracked for 6 days per period is too small and short to show whether the drug changes long-term outcomes like heart health or daytime symptoms.
Dr. Axe's Take
The mechanism here makes sense even in a 9-person trial: opioids blunt the brain's steady breathing signal and make it overcorrect when carbon dioxide swings, and a drug that shifts blood chemistry slightly acidic appears to settle that overreaction. But this is a second drug added to manage a side effect of the first, and it works by deliberately changing your blood chemistry. For anyone on long-term opioids, the bigger question is the root cause: working with a physician on pain management and whether the opioid dose can safely come down over time. If you or someone you love is on long-term opioids and has loud snoring, witnessed breathing pauses or morning headaches, get a sleep study, and don't change any prescribed medication on your own. Alongside that, sleeping on your side, avoiding alcohol near bedtime and keeping nasal passages clear still support steadier breathing overnight.
— Dr. Axe