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WithdrawnNCT02645942CARNIMETUpdated May 6, 2020

L-carnitine for Reducing Cardio-metabolic Risk in Patients With Obstructive Sleep Apnea

An interventional study of L-carnitine and Placebo in Obstructive Sleep Apnea, sponsored by Poznan University of Medical Sciences. Withdrawn. Open to participants aged 18 Years to 75 Years. Per ClinicalTrials.gov, last updated 2020-05-06.

Sponsored by Poznan University of Medical Sciences · Not applicable, Interventional, and Treatment

Why this study was withdrawn
Study stopped due to organization reasons.
Phase
Not applicable
Study type
Interventional
Enrollment
0
Allocation
Randomized
Ages
18 Years to 75 Years
Sex
All
01

Study summary

The investigators designed this intervention to investigate the potential role of L-C in lipid and carbohydrates metabolism (primary outcome) with precision noninvasively measurement of: central blood pressure, pulse wave velocity and peripheral arterial stiffness (secondary outcome) in OSA patients.

Read the detailed description

After screening all patients will be randomized in 1:1 ratio to either placebo group or study group (receiving L-C for 8-weeks). Randomization will stratify patients by: age, sex, BMI and severity of OSA. Randomized patients will receive orally either placebo or L-C once a day for 8-weeks. All supplements will be packed in a white box. Because this is a double-blind study, vial labels will contain a unique identification number that will not disclose to the patient or investigator if L-C or matching placebo is included. The daily amount of L-C will be 1400 mg. The detailed composition of the product will be assessed. All patients will receive a test product during the control visits once a month and will be asked to take it once a day in the morning. The completion of the data will be checked during the visits and also via telephone while the study is conducted. All concomitant medications used (including herbal supplements) will be recorded in electronic database. The patients will be asked to continue their habitual diet. Moreover, they will be also advised that they are free to withdraw from participation in this study at any time, for any reason, and without prejudice. The reason for withdrawal and the date of discontinuation will be recorded in our database. Any Adverse Event (AE) will be recorded according to Common Terminology Criteria for Adverse Events v4.0 (CTCAE), clinically significant AE, severe laboratory abnormality, intercurrent illness, or other medical condition that indicates that continued administration of study medication is not in the best interest of the patient.

The treatment will be administrated under supervision of experienced nutritionist and medical doctor. The anthropometrical and biochemical measurements with assessment of diet, quality of life and sleep will be completed by the patients at each of the study visits, which will take place at the baseline (screening visit), after 4 weeks, in the post-intervention period (week 8) and at a 6-month follow-up.

02

Conditions studied

  • Obstructive Sleep Apnea

Keywords

  • Carnitine
  • placebo
  • risk factors
03

In context

Sleep Apnea, Obstructive

2,263 studies on the registry are indexed under Sleep Apnea, Obstructive; 465 are open to participants now.

Browse Sleep Apnea, Obstructive studies →

Lead sponsor

Poznan University of Medical Sciences is the lead sponsor of 147 studies on the registry; 45 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 75 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • diagnosed OSA classified according to the apnea hypopnea index (AHI) as a mild (5.0-14.9), moderate (15.0-29.9), and severe (≥30.0 events per hour),
  • treatment with Continuous Positive Airway Pressure (CPAP) for at least 6 months before study screening,
  • disturbed lipid metabolism (according to the National Health and Nutrition Examination Survey: LDL-C>100 mg/dl, or TG>150 mg/dl) or use of hypolipidemic drugs,
  • disturbed glucose metabolism (Diabetes mellitus or impaired glucose tolerance or impaired fasting glucose) according to American Diabetes Federation or use of hypoglycaemic drugs,
  • willingness to participate in the study,
  • age over 18,
  • continued habitual diet during the study period,
  • performance status ≥ 80 according to Karnofsky score

Exclusion criteria

Exclusion Criteria:

  • newly diagnosed OSA and individuals treated with CPAP,
  • other than OSA lung dysfunctions,
  • do not use of hypoglycaemic and hypolipidemic drugs,
  • modification of hypolipidemic or hypoglycaemic treatment during the study period,
  • pregnancy or lactation,
  • cancer (excluding curatively treated with no evidence of diseases for 5 years),
  • severe liver and kidney diseases (Aspartate aminotransferase (ASPAT) and alanine aminotransferase (ALAT) >3 × the upper limit of normal (ULN), Bilirubin >1.5 × ULN, Creatinine >1.5 × ULN),
  • known sensitivity to any component of the product,
  • diagnosed CVD (myocardial infarct, stroke, angina pectoris).
  • an active drug or alcohol abuse,
  • legal incompetence,
  • limited legal incompetence,
  • any uncontrolled medical condition that may put studied patients at high risk during study period
05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Investigator)
Enrollment
0 participants (actual)

Study arms

  • Experimental
    Intervention group

    L-carnitine 1400 mg daily for 8 weeks

    Dietary Supplement: L-carnitine

  • Placebo comparator
    Placebo group

    Placebo

    Dietary Supplement: Placebo

Interventions

  • Dietary supplementL-carnitine

    L-carnitine 1400 mg daily for 8 weeks

  • Dietary supplementPlacebo

    Placebo daily for 8 weeks

06

What researchers measure

Primary outcomes

  1. Changes in Total cholesterol, LDL cholesterol, HDL cholesterol and Triglycerides concentration

    Time frame: 6 months

  2. Changes in fasting glucose concentration

    Time frame: 6 months

  3. Changes in insulin concentration

    Time frame: 6 months

Secondary outcomes

  1. Changes in central blood pressure

    Time frame: 6 months

  2. Changes in pulse wave velocity

    Time frame: 6 months

  3. Changes in peripheral arterial stiffness

    Time frame: 6 months

  4. Number of participants with treatment-related adverse events as assessed by CTCAE v4.0

    Time frame: 6 months

07

Study locations

No study locations are listed for this record.

08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Start is estimated for Aug 2020; primary completion for Dec 2020, 4 months later.

How these figures are worked out, and which studies are left out of them.

Registered
Dec 29, 2015
First posted
Jan 5, 2016
StartEst.
Aug 2020
Primary completionEst.
Dec 2020
CompletionEst.
Feb 2021
Last update
May 6, 2020
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on May 6, 2020, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT02645942
Responsible party
Pawel Bogdanski (Ass. Prof, Poznan University of Medical Sciences) — Principal investigator
First posted
Jan 5, 2016
Start date
Aug 2020 (estimated)
Primary completion
Dec 2020 (estimated)
Completion
Feb 2021 (estimated)
Last update
May 6, 2020

Study contacts

Paweł Bogdański, Ass Prof, MD
principal investigator · Poznan University of Medical Sciences

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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