Effects of the Combination of Pimavanserin and Atomoxetine on OSA Severity: A Randomized Crossover Trial.
Ludovico Messineo, Madison Preuss, Ali Azarbarzin...
https://pubmed.ncbi.nlm.nih.gov/40158847/Actively Recruiting
Led by Brigham and Women's Hospital · Updated on 2026-07-10
18
Participants Needed
1
Research Sites
N/A
Total Duration
Obstructive sleep apnea OSA is a common condition with serious health effects, but treatment options are limited. Researchers are studying the combination of atomoxetine and DAW2020 to reduce OSA severity. Previous studies showed atomoxetine with oxybutynin had some effect but also lowered arousal threshold, which is important in OSA. DAW2020, a hypnotic that prolonged sleep time with fewer side effects, may be a better partner for atomoxetine in this treatment approach. Participants will undergo two overnight sleep studies one with the study drugs and one with placebo, separated by a month-long washout period. Atomoxetine will be taken daily, starting at 40 mg for three days then increasing to 80 mg for four days, with DAW2020 given at 34 mg one hour before sleep for one week. During study nights, participants will breathe naturally without CPAP and be monitored with full sleep studies to assess sleep quality, breathing events, and physiological measures such as arousal and oxygen levels. Participants will visit the lab in the evening for monitoring with polysomnography and physiological assessments. A medical history, physical exam, and pregnancy test for premenopausal women will be done before each nights study. Researchers will measure the effect of the drug combination on OSA severity, arousal index, and oxygen desaturation over one week. The study is randomized and blinded, with careful safety and physiological monitoring throughout the trial.
CONDITIONS
Atomoxetine and DAW2022 on OSA Severity
L
Ludovico Messineo, MD, PhD
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Brigham and Women's Hospital
Lead Sponsor
This table compares participation in this trial with other options available for this condition. The information is drawn from published research and the trial’s study details and is provided for educational purposes only.
| Factors | Atomoxetine + DAW2020 (investigational) | Placebo (trial comparator) | Continuous positive airway pressure (standard care) |
|---|---|---|---|
| What it is | An investigational oral combination of atomoxetine and DAW2020 capsules administered before sleep to target OSA severity. | A matching placebo oral capsule regimen taken before sleep as the comparator condition in the trial. | Continuous positive airway pressure device that delivers pressurized air to keep the airway open during sleep. |
| Role in trial | Assigned investigational treatment condition. | Assigned placebo control condition within crossover design. | Not part of the trial, represents standard clinical OSA treatment. |
| Primary use | To reduce OSA severity as measured by apnea‑hypopnea index over one week. | To serve as a control condition to assess investigational treatment effects. | To maintain airway patency and reduce breathing events during sleep as standard long‑term management. |
| How it is given or performed | Oral capsules taken before sleep in a crossover manner across two one‑week periods. | Matching oral placebo capsules taken before sleep in crossover fashion. | Worn during sleep as a mask delivering pressurized air via tubing connected to a machine. |
| Evidence status | Efficacy for reducing OSA severity is being studied in this crossover trial; outcomes not yet reported. | Expected to have no effect on OSA severity beyond placebo. | Well-established to reduce apnea‑hypopnea events when used consistently. |
| Important risks | Risks are unknown beyond trial; safety profile will depend on study results. | Minimal risk expected as inert placebo. | Well‑known minor risks such as skin irritation, nasal congestion, or discomfort from mask use. |
| Important limitations | Effectiveness unknown until results; short duration (1 week) may not reflect longer-term effects. | Acting only as inert control, not providing therapeutic benefit. | Adherence can be challenging; some patients find mask uncomfortable or intolerable long‑term. |
Disclaimer: This comparison is created with the help of artificial intelligence(AI) and may contain errors or missing information. It is not medical advice and does not mean one option is better or safer than another. Clinical trials are still being studied, and joining a trial is your choice. Please consult your healthcare professional before making any decisions.
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Duration - 2 to 4 weeks
Participants are screened for eligibility to participate in the trial.
Duration - 1 week
Participants take either atomoxetine and DAW2020 or placebo capsules over one week while undergoing overnight sleep studies to monitor breathing and sleep patterns.
2 overnight visits for sleep studies
Study Type
INTERVENTIONAL
Masking
QUADRUPLE
Allocation
RANDOMIZED
Model
CROSSOVER
Primary Purpose
TREATMENT
Number of Arms
2
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Ludovico Messineo, Madison Preuss, Ali Azarbarzin...
https://pubmed.ncbi.nlm.nih.gov/40158847/Brigham and Women's Hospital
Lead Sponsor