Clinical trial Recruiting at 1 site Phase1; Phase2 Interventional Ages 21 to 70

Drug treatment for patients with obstructive sleep apnea who didn't respond to other therapies

Official title: Treating Residual OSA With Endotype-directed Pharmacotherapy (Aim 3)

Run by Brigham and Women's Hospital · NCT05293600 · Data updated 2026-11-12

This study is testing if adding certain medications can help people with obstructive sleep apnea who haven't improved with other treatments feel better.

More Obstructive Sleep Apnea trials

Quick facts

PhasePhase1; Phase2
Study typeInterventional
Ages21 Years to 70 Years
SexAll
Enrollment70 (estimated)
SponsorBrigham and Women's Hospital
Academic / other
Locations1 site (Boston, Massachusetts)
StatusRecruiting
StartedJuly 1, 2023
Main results expectedOctober 30, 2026
Study endsOctober 30, 2026
Registry record updatedJuly 15, 2026
Trial IDNCT05293600 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are individuals who have failed MAD or HGNS therapy and have a residual apnea-hypopnea index (AHI) of 15 events/hour or more.

Probably not a fit

Patients with central sleep apnea, other significant sleep disorders, or unstable major medical conditions may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This study aims to evaluate the effectiveness of adding pharmacotherapy to patients with obstructive sleep apnea (OSA) who have not responded to mandibular advancement devices (MAD) or hypoglossal nerve stimulation (HGNS). Participants will receive one of several drug treatments, including acetazolamide, trazodone, or a combination of atomoxetine and eszopiclone, based on their specific OSA endotype. The goal is to identify effective rescue strategies for those who continue to experience symptoms despite existing therapies.

Why it matters

Potential benefit: If successful, this study could provide new treatment options for patients with persistent obstructive sleep apnea who have not benefited from standard therapies.

How similar studies have gone: While the approach of combining pharmacotherapy with existing treatments is innovative, similar studies have shown promise in addressing treatment-resistant cases of obstructive sleep apnea.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Individuals who have failed MAD or HGNS therapy, defined as a residual AHI ≥ 15 events/hr on MAD or HGNS therapy.

Exclusion Criteria:

* Sleep disordered breathing or respiratory disorders other than obstructive sleep apnea:

central sleep apnea (\>50% of respiratory events scored as central), chronic hypoventilation/hypoxemia (awake SaO2 \< 92% by oximetry) due to chronic obstructive pulmonary disease or other respiratory conditions.

* Other sleep disorders: periodic limb movements (periodic limb movement index \> 20/hr), narcolepsy, or parasomnias.
* Any unstable major medical condition.
* Medications expected to stimulate or depress respiration (including opioids, barbiturates, benzodiazepines, doxapram, almitrine, theophylline, 4-hydroxybutanoic acid).
* Use of SSRIs/SNRIs.
* Contraindications for atomoxetine, including:
* pheochromocytoma
* use of monoamine oxidase inhibitors
* benign prostatic hypertrophy, urinary retention
* untreated narrow angle glaucoma
* bipolar disorder, mania, psychosis
* clinically significant constipation, gastric retention
* pre-existing seizure disorders
* clinically-significant kidney disorders
* clinically-significant liver disorders
* clinically-significant cardiovascular conditions
* severe hypertension (SBP\>180 mmHg or DBP\>110 mmHg measured at baseline)
* cardiomyopathy (LVEF\<50%) or heart failure
* advanced atherosclerosi
* history of cerebrovascular events
* history of cardiac arrhythmias e.g., atrial fibrillation, QT prolongation
* other serious cardiac conditions that would raise the consequences of an increase in blood pressure or heart rate
* myasthenia gravis
* pregnancy/breast-feeding
* Contraindications for eszopiclone, including:
* Hypersensitivity to eszopiclone
* Chronic Obstructive Pulmonary Disease (COPD)
* Pregnancy
* Breast feeding
* Liver disease
* Contraindications for acetazolamide, including:
* Hyperchloremic acidosis
* Hypokalemia
* Hyponatremia
* Adrenal insufficiency
* Impaired kidney function
* Hypersensitivity to acetazolamide or other sulfonamides.
* Marked liver disease or impairment of liver function, including cirrhosis.
* Contraindications for trazodone, including:
* suicidal ideation
* bipolar disorder, mania
* use of monoamine oxidase inhibitors
* coronary artery disease
* cardiac arrhythmias
* QT prolongation
* hepatic disease
* renal failure or impairment
* closed angle glaucoma
* priapism
* pregnancy/breast-feeding

Where it's running

  • Sleep Disorders Research Program Brigham and Women's Hospital
    Boston, Massachusetts, United States
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.