A Trial to Evaluate Interactions Between Antiemetic Medication and AMG 133 in Participants Living With Overweight or Obesity

December 16, 2025 updated by: Amgen

A Phase 1, Randomized, Open-label, Parallel-group, Drug-drug Interaction Study to Evaluate the Effect of Antiemetic Medication on the Pharmacokinetics of AMG 133 in Participants Living With Overweight or Obesity

The primary objective of this trial is to evaluate the pharmacokinetics (PK) of AMG 133 administered alone and in combination with an antiemetic medication, ondansetron, in participants living with overweight or obesity.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
59

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • California
      • Los Alamitos, California, United States, 90720
        • CenExel Collaborative Neuroscience Research, LLC Los Alamitos

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria

  1. Male or female participants, between 18 and 65 years of age.
  2. Body mass index > 25 kg/m^2.

Exclusion Criteria

  1. History or evidence of clinically significant disorder, condition, or disease not otherwise excluded that, in the opinion of the Investigator, would pose a risk to participant safety or interfere with the trial evaluation, procedures, or completion.
  2. History of or active diabetes or hemoglobin A1C > 6.5%.
  3. History or evidence of endocrine disorder.
  4. History of acute or chronic pancreatitis within 1 year, or elevation in serum lipase/amylase (> 2 x upper limit of normal [ULN]), or fasting serum triglyceride level of > 500 mg/dL.
  5. Personal or family history of medullary thyroid carcinoma or multiple endocrine neoplasia type 2.
  6. Uncontrolled thyroid disease.
  7. History or current signs or symptoms of cardiovascular disease.
  8. A QT interval corrected for heart rate based on the Fridericia's method (QTcF) interval > 450 msec in male participants or > 470 msec in female participants or history/evidence of long QT syndrome.
  9. History of hypersensitivity, intolerance, or allergy to AMG 133 or its ingredients.
  10. Any contraindication to ondansetron ODT according to the applicable labelling.
  11. Alanine aminotransferase or aspartate aminotransferase > 2 x the ULN.
  12. Use of any over-the-counter or prescription medications within 30 days or 5 half-lives (whichever is longer) before check-in.
  13. Current use or prior use of any glucagon-like peptide 1 receptor (GLP-1R) agonist, or glucose-dependent insulinotropic polypeptide receptor (GIPR) agonist or antagonist within the past 3 months.
  14. Participant has received a dose of an investigational medicinal product (IMP) within the past 30 days or 5 half-lives.
  15. Have previously completed or withdrawn from this trial or any other trial investigating AMG 133 or have previously received the IMP.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Basic Science
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Low Dose AMG 133 without Ondansetron
Participants will receive a single subcutaneous (SC) low dose of 70 mg AMG 133.
Drug: AMG 133
AMG 133 will be administered SC.
Experimental: High Dose AMG 133 without Ondansetron
Participants will receive a single SC high dose of 350 mg AMG 133.
Drug: AMG 133
AMG 133 will be administered SC.
Experimental: Low Dose AMG 133 with Ondansetron
Participants will receive a single SC low dose of 70 mg AMG 133 and ondansetron 8 mg orally disintegrating tablet (ODT) every 8 hours for 72 hours.
Drug: AMG 133
AMG 133 will be administered SC.
Drug: Ondansetron
Ondansetron will be administered via ODT.
Experimental: High Dose AMG 133 with Ondansetron
Participants will receive a single SC high dose of 350 mg AMG 133 and ondansetron 8mg ODT every 8 hours for 72 hours.
Drug: AMG 133
AMG 133 will be administered SC.
Drug: Ondansetron
Ondansetron will be administered via ODT.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Time Frame
Maximum Observed Plasma Concentration (Cmax) of AMG 133
Time Frame: Up to Day 120
Up to Day 120
Area Under the Plasma Concentration-time Curve (AUC) from Time Zero to Time of Last Quantifiable Concentration (AUClast) of AMG 133
Time Frame: Up to Day 120
Up to Day 120
AUC from Time Zero to Infinity (AUCinf) of AMG 133
Time Frame: Up to Day 120
Up to Day 120

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Time Frame
Number of Participants with Treatment-emergent Adverse Events (TEAEs)
Time Frame: Up to Day 120
Up to Day 120
Number of Participants with Serious AEs (SAEs)
Time Frame: Up to Day 120
Up to Day 120
Number of Participants with Anti-AMG 133 Antibodies
Time Frame: Up to Day 120
Up to Day 120

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Amgen

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Director: MD, Amgen

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Helpful Links

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
December 10, 2024

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
May 9, 2025

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
May 9, 2025

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
December 16, 2025

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
December 16, 2025

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
December 30, 2025

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
December 30, 2025

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
December 16, 2025

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
December 1, 2025

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 20210281

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

De-identified individual patient data for variables necessary to address the specific research question in an approved data sharing request.

IPD Sharing Time Frame

Data sharing requests relating to this study will be considered beginning 18 months after the study has ended and either 1) the product and indication (or other new use) have been granted marketing authorization in both the US and Europe, or 2) clinical development for the product and/or indication discontinues and the data will not be submitted to regulatory authorities. There is no end date for eligibility to submit a data sharing request for this study.

IPD Sharing Access Criteria

Qualified researchers may submit a request containing the research objectives, the Amgen product(s) and Amgen study/studies in scope, endpoints/outcomes of interest, statistical analysis plan, data requirements, publication plan, and qualifications of the researcher(s). In general, Amgen does not grant external requests for individual patient data for the purpose of re-evaluating safety and efficacy issues already addressed in the product labelling. Requests are reviewed by a committee of internal advisors, and if not approved, may be further arbitrated by a Data Sharing Independent Review Panel. Upon approval, information necessary to address the research question will be provided under the terms of a data sharing agreement. This may include anonymized individual patient data and/or available supporting documents, containing fragments of analysis code where provided in analysis specifications. Further details are available at the URL below.

IPD Sharing Supporting Information Type

  • STUDY_PROTOCOL
  • SAP
  • ICF
  • CSR

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

Cookie Settings

We use cookies to ensure that we give you the best experience on our website. For more details carefully read our Privacy and Cookies Policy. ...>>>You can change your preferences or withdraw your consent at any time by deleting the cookies from your website or computer as described in the policy. Please accept it and choose your preferences by ticking the corresponding boxes in the "Manage Settings" section below. Please carefully read our Terms of Service before you proceed with using any part of this website.
«Manage Settings