ObesityPhase 1NCT07921316
Comparing the Extent to Which Maridebart Cafraglutide (AMG 133) is Made Available in the Body When Administered Using Two Subcutaneous Presentations After Multiple Doses
A Phase 1 study testing Maridebart cafraglutide in people with Obesity and Overweight, run by Amgen.
Trial summary
The main objective of this study is to compare the pharmacokinetics of maridebart cafraglutide administered as a single dose using two different subcutaneous (SC) presentations in participants with overweight or obesity after they have received escalating doses of the study drug. Read more about this study
- Who is it for?
- Ages 18 to 60 years
- Conditions the study is for
- Obesity, Overweight
- What is being tested?
- Maridebart cafraglutide
- Type of treatment
- Injection or infusion
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 356 participants
- Where
- No sites listed yet
- Study dates
- 9 Nov 2026to 26 Jul 2027
- Phase
- Phase 1
- Are there results?
- Not yet: the study is under way
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 to 60 years
- All sexes
- No healthy volunteers
- Adult
Who may be able to join
- Adults 18 to 60 years of age.
- Body mass index (BMI) between 25 and 35 kilograms per square meter (kg/m^2), inclusive.
- Stable body weight, with less than 5 kilograms (kg) (11 pounds) of weight change in the past 3 months.
- No significant changes in diet or eating habits in the past 3 months.
- Generally healthy. People with certain well-controlled medical conditions, such as sleep apnea, high blood pressure, high cholesterol, or underactive thyroid, may qualify if their treatment has been stable for at least 3 months and is approved by the study doctor.
- Willing to follow the study's birth control requirements, if applicable, during the study and for the study-defined period after the last dose of study drug.
- Able and willing to provide informed consent before participating in study procedures.
Who cannot join
- History of diabetes or current diabetes, except diabetes during pregnancy, or blood sugar levels that meet the study's definition of diabetes.
- Certain hormonal conditions that can cause weight gain, such as Cushing's syndrome.
- History of pancreatitis (inflammation of the pancreas) or certain abnormal pancreatic blood test results.
- History of cancer within the past 5 years, except certain early-stage cancers or nonmelanoma skin cancers.
- Personal or family history of medullary thyroid cancer or multiple endocrine neoplasia type 2 (MEN2).
- Uncontrolled thyroid disease or certain abnormal thyroid blood test results.
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- Significant stomach or intestinal conditions, including delayed stomach emptying, ulcers, or inflammatory bowel disease, or a history of certain digestive system surgeries.
- Weight-loss surgery within the past 6 months.
- Significant heart disease, abnormal heart rhythms, or blood pressure or heart rate outside the study's allowed limits.
- Significant kidney or liver problems, or certain abnormal kidney or liver blood test results.
- Positive tests for human immunodeficiency virus (HIV), hepatitis B, or hepatitis C, with certain exceptions for past hepatitis B vaccination or infection.
- History of certain serious or unstable mental health conditions, self-injury within the past 5 years, or any previous suicide attempt.
- History of ischemic optic neuropathy, a condition involving damage to the optic nerve caused by reduced blood flow.
- Allergy or intolerance to maridebart cafraglutide (AMG 133), similar medications, or their ingredients.
- Use of certain medications, including weight-loss or diabetes medications that act on glucagon-like peptide-1 (GLP-1) or glucose-dependent insulinotropic polypeptide (GIP), within the restricted time periods before the study.
- Use of certain herbal products, vitamins, or supplements within 30 days before enrollment, unless approved by the study doctor.
- Recent participation in another investigational drug study or previous participation in a study of maridebart cafraglutide.
- History of alcohol or drug abuse, recent illegal drug use, or positive alcohol or drug screening results not explained by permitted prescription medications.
- Pregnant, breastfeeding, or planning to breastfeed during the study or within the study-defined period after the last dose of study drug.
- Recent blood, plasma, or platelet donation within the study's restricted time periods.
- Recent strenuous exercise or unwillingness to follow study restrictions on physical activity, alcohol, recreational drugs, diet, or other activities.
- Difficulty providing blood samples because of poor vein access.
- Any other medical condition, abnormal test result, or circumstance that the study doctor believes could make participation unsafe or interfere with study procedures.
Trial locations and contacts
No sites are listed yet. Contact the study team or a site near you to ask about taking part.
About this study
Official title: A Phase 1, Open-label, Randomized, Parallel Group, Multiple Dose Study to Assess the Relative Bioavailability of Maridebart Cafraglutide (AMG 133) as Two Subcutaneous Presentations in Participants Living With Overweight or Obesity
The main objective of this study is to compare the pharmacokinetics of maridebart cafraglutide administered as a single dose using two different subcutaneous (SC) presentations in participants with overweight or obesity after they have received escalating doses of the study drug.
- Conditions
- Obesity, Overweight
- Being tested
- Maridebart cafraglutide
- Keywords
- Maridebart Cafraglutide (AMG 133), Relative Bioavailability, Pharmacokinetics
- Medical subject headings
- Obesity, Overweight
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Maridebart cafraglutideDrug
Also called AMG 133, MariTide
Administered subcutaneously.
| Study group | Role | What they receive |
|---|---|---|
| Maridebart Cafraglutide: SC Presentation 1 | Experimental | Participants will receive maridebart cafraglutide administered subcutaneously (SC) during the initial dose-escalation period and, after randomization, will continue to receive maridebart cafraglutide SC administered using SC Presentation 1. Receives: Drug: Maridebart cafraglutide |
| Maridebart Cafraglutide: SC Presentation 2 | Experimental | Participants will receive maridebart cafraglutide administered SC during the initial dose-escalation period and, after randomization, will continue to receive maridebart cafraglutide SC administered using SC Presentation 2. Receives: Drug: Maridebart cafraglutide |
What is being measured
The primary outcome is the main question the study is designed to answer.
Area Under the Plasma Concentration-time Curve from Time 0 to 28 days post dose (AUC 0-28) of Maridebart Cafraglutide
Measured: Up to 113 days
Maximum Observed Plasma Concentration (Cmax) of Maridebart Cafraglutide
Measured: Up to 113 days
Secondary outcomes (2)
Number of Participants Who Experience Treatment-emergent Adverse Events (TEAEs) and Serious Adverse Events (SAEs)
Measured: TEAEs: From baseline (Day 1) up to end of trial (approximately 28 weeks). SAEs: From screening (Day -28) up to end of trial (approximately 32 weeks)
Number of Participants Who Develop Anti-Maridebart Cafraglutide Antibodies
Measured: Baseline (Day 1) up to end of trial (approximately 28 weeks)
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted6 Nov 2026
- Study start9 Nov 2026 (estimated)
- Primary completion26 Jul 2027 (estimated)
- Study completion26 Jul 2027 (estimated)
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 AmgenThe 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
- Interventional
- Phase
- Phase 1
- Primary purpose
- Basic science
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 356 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Amgen
- Sponsor type
- Industry (pharma, biotech, devices)
- Responsible party
- Sponsor
- Investigators
- MD, Study director, Amgen
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07921316
- Sponsor's protocol ID
- 20260175
- Status last verified
- Oct 2026
- First submitted
- 2 Nov 2026
- Last updated
- 6 Nov 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- Yes
- FDA-regulated device
- No
- Individual data sharing
- Yes: De-identified individual patient data for variables necessary to address the specific research question in an approved data sharing request.
Study at a glance
From the registry record, last updated by the sponsor on 6 Nov 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Phase 1, Open-label, Randomized, Parallel Group, Multiple Dose Study to Assess the Relative Bioavailability of Maridebart Cafraglutide (AMG 133) as Two Subcutaneous Presentations in Participants Living With Overweight or Obesity
- ClinicalTrials.gov ID
- NCT07921316
- Acronym / sponsor ID
- 20260175
- Conditions
- Obesity, Overweight
- Keywords
- Maridebart Cafraglutide (AMG 133), Relative Bioavailability, Pharmacokinetics
- Phase
- Phase 1
- Study type
- Interventional
- Recruitment status
- Not yet recruiting
- Enrolment
- 356 participants (estimated)
- Lead sponsor
- AmgenIndustry (pharma, biotech, devices)
- Study start
- 9 Nov 2026 (estimated)
- Primary completion
- 26 Jul 2027 (estimated)
- Study completion
- 26 Jul 2027 (estimated)
- First posted
- 6 Nov 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.
The main objective of this study is to compare the pharmacokinetics of maridebart cafraglutide administered as a single dose using two different subcutaneous (SC) presentations in participants with overweight or obesity after they have received escalating doses of the study drug.
Study design
- Primary purpose
- Basic science
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Maridebart Cafraglutide: SC Presentation 1 | Experimental | Drug: Maridebart cafraglutideParticipants will receive maridebart cafraglutide administered subcutaneously (SC) during the initial dose-escalation period and, after randomization, will continue to receive maridebart cafraglutide SC administered using SC Presentation 1. |
| Maridebart Cafraglutide: SC Presentation 2 | Experimental | Drug: Maridebart cafraglutideParticipants will receive maridebart cafraglutide administered SC during the initial dose-escalation period and, after randomization, will continue to receive maridebart cafraglutide SC administered using SC Presentation 2. |
Who may qualify
- Ages
- 18 to 60 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult
Key inclusion criteria (7 listed)
- Adults 18 to 60 years of age.
- Body mass index (BMI) between 25 and 35 kilograms per square meter (kg/m^2), inclusive.
- Stable body weight, with less than 5 kilograms (kg) (11 pounds) of weight change in the past 3 months.
- No significant changes in diet or eating habits in the past 3 months.
- Generally healthy. People with certain well-controlled medical conditions, such as sleep apnea, high blood pressure, high cholesterol, or underactive thyroid, may qualify if their treatment has been stable for at least 3 months and is approved by the study doctor.
Key exclusion criteria (23 listed)
- History of diabetes or current diabetes, except diabetes during pregnancy, or blood sugar levels that meet the study's definition of diabetes.
- Certain hormonal conditions that can cause weight gain, such as Cushing's syndrome.
- History of pancreatitis (inflammation of the pancreas) or certain abnormal pancreatic blood test results.
- History of cancer within the past 5 years, except certain early-stage cancers or nonmelanoma skin cancers.
- Personal or family history of medullary thyroid cancer or multiple endocrine neoplasia type 2 (MEN2).
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 |
|---|---|---|
| Maridebart cafraglutideAlso: AMG 133, MariTideAdministered subcutaneously. | Drug | Maridebart Cafraglutide: SC Presentation 1, Maridebart Cafraglutide: SC Presentation 2 |
Primary outcome
Area Under the Plasma Concentration-time Curve from Time 0 to 28 days post dose (AUC 0-28) of Maridebart Cafraglutide
Time frame: Up to 113 days
Maximum Observed Plasma Concentration (Cmax) of Maridebart Cafraglutide
Time frame: Up to 113 days
2 secondary outcomes
Number of Participants Who Experience Treatment-emergent Adverse Events (TEAEs) and Serious Adverse Events (SAEs)
Time frame: TEAEs: From baseline (Day 1) up to end of trial (approximately 28 weeks). SAEs: From screening (Day -28) up to end of trial (approximately 32 weeks)
Number of Participants Who Develop Anti-Maridebart Cafraglutide Antibodies
Time frame: Baseline (Day 1) up to end of trial (approximately 28 weeks)
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 6 Nov 2026.
- AmgenTrials clinical trials websiteLink provided by the sponsor.
- Individual participant dataSharing planned: Yes. De-identified individual patient data for variables necessary to address the specific research question in an approved data sharing request.
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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.
MD study director
Amgen
Questions about this trial
What is this clinical trial studying?
A Phase 1 study testing Maridebart cafraglutide in people with Obesity and Overweight, run by Amgen.
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 7 inclusion and 23 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: opening soon, as of the sponsor's last update on 6 Nov 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.
What does this phase mean?
Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Amgen Call Center (866-572-6436, medinfo@amgen.com), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Area Under the Plasma Concentration-time Curve from Time 0 to 28 days post dose (AUC 0-28) of Maridebart Cafraglutide (time frame: Up to 113 days). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
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 Nov 2026.