ObesityNCT07629401
Pre-approval Expanded Access of Retatrutide (LY3437943)
A study testing Retatrutide in people with Obesity and Obesity-related Complications, run by Eli Lilly and Company.
Trial summary
Provide pre-approval single-patient expanded access of retatrutide (LY3437943), an investigational GLP-1/GIP/glucagon triple receptor agonist being studied for chronic weight management, for adults with severe obesity (body mass index [BMI] greater than or equal to [≥]35 kilogram per square meter [kg/m²] and at least… Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Obesity, Obesity-related Complications
- What is being tested?
- Retatrutide
- How many people
- Not given
- Where
- No sites listed yet
- Study dates
- Start not givento not given
- Phase
- Expanded access
- Are there results?
- None posted in the registry
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
- Adult, Older adult
Who may be able to join
- Age 18 years or older.
- Refractory obesity, defined as BMI >= 35 kg/m2 despite adherence to and tolerance of treatment with highest available dose of chronic weight management therapy.
- Two or more serious or life-threatening obesity-related complications for which the patient is currently receiving standard of care
- Unable to participate in an ongoing clinical trial of retatrutide or a similar/comparable investigational medicine (due to trial eligibility criteria or lack of a reasonably accessible enrolling site).
- All standard treatment options including bariatric surgery discussed with the patient through shared decision-making.
Who cannot join
- Medical contraindication to retatrutide therapy
Trial locations and contacts
No sites are listed yet.
Physician Inquiries for Lilly Clinical Trial Information: contact
About this study
Provide pre-approval single-patient expanded access of retatrutide (LY3437943), an investigational GLP-1/GIP/glucagon triple receptor agonist being studied for chronic weight management, for adults with severe obesity (body mass index [BMI] greater than or equal to [≥]35 kilogram per square meter [kg/m²] and at least two serious or life-threatening obesity-related complications who are refractory to the best approved therapy and are unable to participate in an ongoing clinical trial of retatrutide or a comparable investigational medicine.
Read the detailed description
Treating physicians who believe an individual patient may be a candidate for expanded access should contact Lilly via the Lilly Answers Center at 1-800-LillyRx (1-800-545-5979). Requests are initiated by the treating physician on behalf of the patient; patients and caregivers should be directed to their treating physician rather than contacting Lilly directly. Availability will depend on geography, product supply, and detailed individual eligibility assessment, to ensure consistent application of the general eligibility criteria listed above.
- Conditions
- Obesity, Obesity-related Complications
- Being tested
- Retatrutide
- Keywords
- Retatrutide, LY3437943, Expanded Access
- Medical subject headings
- Obesity
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
RetatrutideDrug
Also called LY3437943
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted5 Jun 2026
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for ObesityStudies of the same condition, open and under way.
- More trials run by Eli Lilly and CompanyThe sponsor's other registered studies.
- 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
- Expanded access
Sponsor and investigators
- Lead sponsor
- Eli Lilly and Company
- Sponsor type
- Industry (pharma, biotech, devices)
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07629401
- Sponsor's protocol ID
- 27979
- Other IDs
- J1I-MC-Y001
- Status last verified
- Aug 2026
- First submitted
- 1 Jun 2026
- Last updated
- 6 Aug 2026
- Results posted
- No
Study at a glance
From the registry record, last updated by the sponsor on 6 Aug 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Pre-approval Expanded Access of Retatrutide (LY3437943)
- ClinicalTrials.gov ID
- NCT07629401
- Acronym / sponsor ID
- 27979
- Conditions
- Obesity, Obesity-related Complications
- Keywords
- Retatrutide, LY3437943, Expanded Access
- Study type
- Expanded access
- Recruitment status
- Available
- Lead sponsor
- Eli Lilly and CompanyIndustry (pharma, biotech, devices)
- First posted
- 5 Jun 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Provide pre-approval single-patient expanded access of retatrutide (LY3437943), an investigational GLP-1/GIP/glucagon triple receptor agonist being studied for chronic weight management, for adults with severe obesity (body mass index [BMI] greater than or equal to [≥]35 kilogram per square meter [kg/m²] and at least two serious or life-threatening obesity-related complications who are refractory to the best approved therapy and are unable to participate in an ongoing clinical trial of retatrutide or a comparable investigational medicine.
Detailed description
Treating physicians who believe an individual patient may be a candidate for expanded access should contact Lilly via the Lilly Answers Center at 1-800-LillyRx (1-800-545-5979). Requests are initiated by the treating physician on behalf of the patient; patients and caregivers should be directed to their treating physician rather than contacting Lilly directly. Availability will depend on geography, product supply, and detailed individual eligibility assessment, to ensure consistent application of the general eligibility criteria listed above.
Study design
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Age groups
- Adult, Older adult
Key inclusion criteria (5 listed)
- Age 18 years or older.
- Refractory obesity, defined as BMI >= 35 kg/m2 despite adherence to and tolerance of treatment with highest available dose of chronic weight management therapy.
- Two or more serious or life-threatening obesity-related complications for which the patient is currently receiving standard of care
- Unable to participate in an ongoing clinical trial of retatrutide or a similar/comparable investigational medicine (due to trial eligibility criteria or lack of a reasonably accessible enrolling site).
- All standard treatment options including bariatric surgery discussed with the patient through shared decision-making.
Key exclusion criteria (1 listed)
- Medical contraindication to retatrutide therapy
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| RetatrutideAlso: LY3437943 | Drug | – |
Primary outcome
Not reported in the source record.
Results and safety
Results are not available in the source record.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 6 Aug 2026.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Physician Inquiries for Lilly Clinical Trial Information: contact
Questions about this trial
What is this clinical trial studying?
A study testing Retatrutide in people with Obesity and Obesity-related Complications, run by Eli Lilly and Company.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 5 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: status not confirmed, as of the sponsor's last update on 6 Aug 2026. Status can change between updates, so confirm with the study contact before making plans.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
Results are not available in the source record.
How can a doctor refer a patient or contact the research team?
Contact Physician Inquiries for Lilly Clinical Trial Information: (1-800-LillyRx (1-800-545-5979), ClinicalTrials@lilly.com), or a site near the patient. AzTrials does not enrol participants or take referrals.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 6 Aug 2026.