Clinical trial Recruiting at 4 sites Phase 4 Interventional Ages 18 to 65

Using low sodium oxybate to improve sleep in patients with idiopathic hypersomnia

Official title: Impact of Low Sodium Oxybate on Total Sleep Time in Patients With Idiopathic Hypersomnia

Run by Mayo Clinic · NCT05837091 · Data updated 2026-11-12

This study is testing if low sodium oxybate can help people with idiopathic hypersomnia sleep better and stay asleep longer.

More Idiopathic Hypersomnia trials

Quick facts

PhasePhase 4
Study typeInterventional
Ages18 Years to 65 Years
SexAll
Enrollment30 (estimated)
SponsorMayo Clinic
Academic / other
Locations4 sites (Phoenix, Arizona and 3 other locations)
StatusRecruiting
StartedFebruary 14, 2024
Main results expectedJanuary 29, 2027
Study endsJune 2027
Registry record updatedMay 12, 2026
Trial IDNCT05837091 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults aged 18 to 65 with a primary diagnosis of idiopathic hypersomnia and specific sleep duration and sleepiness criteria.

Probably not a fit

Patients who do not meet the eligibility criteria or have not been recommended low sodium oxybate by a clinical sleep specialist 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 clinical trial investigates the effects of low sodium oxybate on individuals diagnosed with idiopathic hypersomnia, focusing on their ability to maintain prolonged sleep. The study employs advanced monitoring techniques, including 24-hour polysomnography and innovative EEG earbuds, to accurately assess sleep patterns and wakefulness. Participants will be closely monitored to evaluate the efficacy of the treatment as part of their routine medical care, with adjustments made by clinical sleep specialists.

Why it matters

Potential benefit: If successful, this treatment could significantly enhance the quality of sleep and overall well-being for patients suffering from idiopathic hypersomnia.

How similar studies have gone: Previous studies have shown positive outcomes with low sodium oxybate for sleep disorders, indicating a promising approach for idiopathic hypersomnia.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Primary diagnosis of IH, according to ICSD-3 criteria (does not require MSLT)
2. Subjects aged 18 - 65 years
3. BMI between 18 and 35 kg/m2
4. Self-reported sleep duration ≥ 9 hours most days including daytime naps/sleep based upon at least 10/14 days of completed sleep diary entries
5. Epworth Sleepiness Scale (ESS) ≥ 10 (required at pre-screening visit only)
6. Recommended LSO by a clinical sleep specialist as part of routine medical care. The clinical sleep specialist will be responsible for titrating LSO according to standard of care.
7. Subject must be willing to postpone LSO therapy until all baseline assessments completed
8. If treated with wake promoting agents, traditional stimulants and/or antidepressant(s), a stable dose and regimen will be required for at least 2 months before study entry and throughout the main study
9. Have used a medically acceptable method of contraception for at least 2 full menstrual cycles before participating in this study and consent to use a medically acceptable method of contraception from the first dose of study drug, throughout the entire study period, and for 30 days after the last dose of study drug.

Exclusion Criteria:

1. Succinic semialdehyde dehydrogenase deficiency, porphyria
2. Other central nervous system diseases: neurodegenerative diseases, , seizure disorders or history of head trauma associated with loss of consciousness
3. Lifetime history of suicide attempt or suicidal ideation in the past six months, including answer to question #9 on PHQ-9 ≥1; PHQ-9 total score \> 10; prior history of psychotic episodes; active major depressive disorder
4. Change to psychiatric medication(s)/stimulant(s) within last 3 months
5. History of chronic alcohol or drug abuse within the prior 12 months
6. Malignant neoplastic disease requiring therapy within the prior 12 months
7. Heart failure, severe hypertension or other cardiovascular disease compromising the patient's well-being or ability to participate in this study
8. Renal or hepatic impairment
9. Compromised respiratory function (e.g., history of COPD, pulmonary hypertension, and/or poorly controlled asthma)
10. Diagnosis of sleep-related breathing disorders (AHI ≥ 15 events/h using 4 % AHI) or high suspicion for sleep disordered breathing
11. Any sleep apnea treatment (e.g., Positive Airway Pressure (PAP) therapy, oral appliance therapy, etc.)
12. No regular sleep at night: shift work or other continuous, non-disease-related life conditions
13. Participation in another study of an investigational drug within the 28 days prior to Screening visit or currently
14. Pregnant and/or breast-feeding
15. Ear jewelry and/or piercings that subject not willing to/unable to remove
16. Use of device/implant that may interfere with the study devices/procedures (e.g., vagal nerve stimulator)
17. Smoke and/or use of smokeless tobacco products
18. Subjects who, in the opinion of the investigator(s), may not be suitable for the study

Where it's running

  • Mayo Clinic Arizona
    Phoenix, Arizona, United States
    Recruiting
  • Stanford University
    Redwood City, California, United States
    Recruiting
  • Mayo Clinic Florida
    Jacksonville, Florida, United States
    Recruiting
  • Beth Israel Deaconess Medical Center
    Boston, Massachusetts, United States
    Recruiting

Study contacts

Similar studies

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

  • Long-term test of TAK-360 in people with narcolepsy or idiopathic hypersomnia

    This study tests TAK-360 over an extended period to see if it is tolerable for people with narcolepsy type 1, narcolepsy type 2, or idiopathic hypersomnia who completed an earlier TAK-360 trial.

    Recruiting at 33 sites Phase 2/3 Takeda · Chula Vista, California and 32 other locations · NCT07646678

  • Expanded-dosing Xywav vs placebo in narcolepsy and IH

    This study tests whether expanded nightly dosing of Xywav helps adults with narcolepsy or idiopathic hypersomnia, compared with placebo.

    Recruiting at 15 sites Phase 3 Jazz Pharmaceuticals · Birmingham, Alabama and 14 other locations · NCT07625280

  • Phase 3 HBS-301 for idiopathic hypersomnia

    This trial will test whether the oral medicine HBS-301 helps adults with idiopathic hypersomnia reduce daytime sleepiness, sleep inertia, and fatigue.

    Recruiting at 42 sites Phase 3 Harmony Biosciences Management, Inc. · Birmingham, Alabama and 41 other locations · NCT07500090

  • Long-term ORX750 treatment for people with narcolepsy or idiopathic hypersomnia

    This open-label extension will try continued ORX750 treatment in people with narcolepsy or idiopathic hypersomnia who completed the earlier ORX750 parent study.

    Recruiting at 24 sites Phase 2 Centessa Pharmaceuticals (UK) Limited · Auburn, Alabama and 23 other locations · NCT07096674

  • Diet changes to reduce sleepiness in narcolepsy and idiopathic hypersomnia

    This project will try whether a 12-week whole-food ketogenic diet versus an isocaloric standard whole-food diet reduces daytime sleepiness and improves quality of life in adults with narcolepsy or idiopathic hypersomnia.

    Recruiting University of Sydney · Macquarie Park, New South Wales · NCT07006233

  • Evaluating TAK-360 for daytime sleepiness in adults with Idiopathic Hypersomnia

    This study is testing a new medication called TAK-360 to see if it can help adults with Idiopathic Hypersomnia feel less sleepy during the day.

    Recruiting at 28 sites Phase 2 Takeda · Redwood City, California and 28 other locations · NCT06812078

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.