Obstructive Sleep Apnea (OSA)Phase 3NCT07501832
Evaluate the Efficacy and Safety of GZR18 Injection in Obese Subjects With Obstructive Sleep Apnea Receiving Positive Airway Pressure (PAP) Therapy
A Phase 3 study testing GZR18 injection in people with Obstructive Sleep Apnea (OSA), run by Gan & Lee Pharmaceuticals. at 1 site in China.
Trial summary
The study is a multicenter, randomized, double-blind, parallel-group, placebo-controlled Phase III clinical trial to evaluate the efficacy and safety of GZR18 injection in Chinese adult obese patients with moderate-to-severe obstructive sleep apnea (OSA) who are currently using positive airway pressure (PAP) therapy. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Obstructive Sleep Apnea (OSA)
- What is being tested?
- GZR18 injection
- Type of treatment
- Injection or infusion
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 140 participants
- Where
- 1 siteChina
- Study dates
- 27 Mar 2026to 28 Sep 2028
- Phase
- Phase 3
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Subject is aged ≥18 years at the time of signing the informed consent form.
- Body mass index (BMI) is ≥28 kg/m² at both screening and randomization.
- Subject has a documented history of at least one unsuccessful attempt at weight loss through dietary control prior to screening, and has had <5% change in body weight during the 12 weeks prior to screening (see Appendix 2 for the weight change calculation formula).
- Subject has been diagnosed with obstructive sleep apnea (OSA) according to the International Classification of Sleep Disorders, 3rd Edition (ICSD-3) criteria prior to screening, and has a centrally assessed apnea-hypopnea index (AHI) ≥15 events/hour on polysomnography (PSG) at screening. (See Appendix 3 for ICSD-3 diagnostic criteria for adult OSA.)
- Subject has been receiving continuous positive airway pressure (PAP) therapy for at least 12 consecutive weeks prior to screening and intends to continue PAP therapy throughout the study period.
- Subjects of childbearing potential must agree to remain abstinent or use highly effective contraception from the time of signing informed consent until 8 weeks after the last dose of investigational product, and must not donate sperm or oocytes during this period. Female subjects of childbearing potential must not be lactating and must have a negative pregnancy test at both screening and randomization.
- The subject fully understands the purpose, nature, methods, and potential adverse reactions of the trial; is able to communicate effectively with the investigator; comprehends and agrees to comply with all study requirements; and voluntarily signs the informed consent form to participate in this study.
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Who cannot join
- Known or suspected hypersensitivity to glucagon-like peptide-1 receptor agonists (GLP-1 RAs) or any of their excipients, or presence of a contraindication to GLP-1 RA use.
- History of any type of diabetes mellitus (history of gestational diabetes is permitted).
- Has undergone or plans to undergo during the study period surgical or device-based obesity treatment (exceptions: acupuncture, liposuction, or abdominal fat removal performed >1 year prior to screening; prior device-based obesity treatment is acceptable if the device was removed >1 year before screening).
- Secondary obesity due to disease, medication, or other causes (e.g., Cushing's syndrome, Prader-Willi syndrome, monogenic obesity, or obesity secondary to hypothalamic/pituitary injury).
- Clinically significant gastric emptying disorders at screening (e.g., gastroparesis or gastric outlet obstruction); or long-term use (≥4 consecutive weeks) of medications affecting gastrointestinal motility within 6 months prior to screening.
- History of acute or chronic pancreatitis or pancreatic injury prior to screening.
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- History of symptomatic gallbladder disease at screening (post-cholecystectomy status is permitted); or presence at screening of cholelithiasis conferring high risk for acute biliary pancreatitis.
- Clinical or subclinical thyrotoxicosis at screening, regardless of treatment status.
- Inadequately controlled blood pressure at screening or randomization: systolic BP ≥160 mmHg and/or diastolic BP ≥100 mmHg (concurrent antihypertensive therapy is permitted).
- History within 6 months prior to screening of: decompensated heart failure (NYHA Class III-IV), unstable angina, myocardial infarction, ischemic or hemorrhagic stroke (lacunar infarcts excluded), transient ischemic attack; or invasive cardiovascular procedures/therapies (e.g., valve replacement, CABG, PCI). (Diagnostic coronary angiography without intervention is permitted.)
- Positive response on the Columbia-Suicide Severity Rating Scale (C-SSRS) Screening Version to Question 4 or 5 of the "Suicidal Ideation" section, or any question in the "Suicidal Behavior" section, with the event occurring within 4 weeks prior to screening; or investigator assessment of significant suicide risk during the study.
- History of moderate-to-severe depression; or Patient Health Questionnaire-9 (PHQ-9) score ≥15 at screening.
- Any uncontrolled acute or chronic hepatitis other than metabolic dysfunction-associated fatty liver disease (MAFLD).
- Personal or family history of medullary thyroid carcinoma (MTC) or multiple endocrine neoplasia (MEN) type 2A or 2B.
- History of malignancy within 5 years prior to screening (exceptions: definitively cured in situ carcinomas, e.g., basal/squamous cell skin cancer, cervical in situ carcinoma, or prostate in situ carcinoma).
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
China1 site
Gan & Lee Pharmaceuticals
Beijing
na ou, 15288850128, na.ou@ganlee.com
About this study
Official title: A Multicenter, Randomized, Double-Blind, Parallel-Group, Placebo-Controlled Phase III Clinical Trial to Evaluate the Efficacy and Safety of GZR18 Injection in Obese Subjects With Moderate to Severe Obstructive Sleep Apnea Receiving Positive Airway Pressure (PAP) Therapy
The study is a multicenter, randomized, double-blind, parallel-group, placebo-controlled Phase III clinical trial to evaluate the efficacy and safety of GZR18 injection in Chinese adult obese patients with moderate-to-severe obstructive sleep apnea (OSA) who are currently using positive airway pressure (PAP) therapy. This study will assess the impact of GZR18 on OSA-related symptoms, respiratory parameters, and quality of life compared to placebo.
- Conditions
- Obstructive Sleep Apnea (OSA)
- Being tested
- GZR18 injection, Placebo
- Medical subject headings
- Sleep Apnea, Obstructive
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
GZR18 injectionDrug
subcutaneous administration
PlaceboDrug
subcutaneous administration
| Study group | Role | What they receive |
|---|---|---|
| GZR18 injection | Experimental | Not described Receives: Drug: GZR18 injection |
| Placebo | Placebo comparator | Not described Receives: Drug: Placebo |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change from baseline in Apnea-Hypopnea Index (AHI) after 52 weeks of treatment
Measured: 52 weeks
Secondary outcomes (3)
Proportion of participants with ≥50% reduction in AHI from baseline
Measured: 52weeks
Proportion of participants achieving the following criteria：AHI < 5; or 5 ≤ AHI ≤ 14 and Epworth Sleepiness Scale (ESS) score ≤ 10
Measured: 52weeks
Percentage change in body weight from baseline
Measured: 52weeks
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted30 Mar 2026
- Study start27 Mar 2026 (estimated)
- Primary completion28 Sep 2028 (estimated)
- Study completion28 Sep 2028 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Obstructive Sleep Apnea (OSA)Studies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 3
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind
- Who is masked
- Participant, Investigator
- Enrolment
- 140 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Gan & Lee Pharmaceuticals.
- Sponsor type
- Industry (pharma, biotech, devices)
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07501832
- Sponsor's protocol ID
- GZR18-OSA-302
- Status last verified
- Mar 2026
- First submitted
- 24 Mar 2026
- Last updated
- 3 Apr 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No