ClinicalTrials.gg
CompletedNCT06596135Updated Jul 15, 2026

Open-Label Extension Study of Setmelanotide

A Phase 3 interventional study of Setmelanotide in Obesity Associated With Defects in Leptin-melanocortin Pathway, sponsored by Rhythm Pharmaceuticals, Inc.. Completed at 13 sites in United States. Open to participants aged 2 Years and older. Per ClinicalTrials.gov, last updated 2026-07-15.

Sponsored by Rhythm Pharmaceuticals, Inc. · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
28
Allocation
Not applicable
Ages
2 Years and older
Sex
All
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Study summary

This is an open-label extension study designed to evaluate the long-term safety and tolerability of continued setmelanotide treatment in male and female patients ≥2 years of age who have completed or transitioned from a previous study with setmelanotide for rare genetic, syndromic, or acquired diseases of obesity upstream of the MC4R pathway.

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Conditions studied

  • Obesity Associated With Defects in Leptin-melanocortin Pathway

Keywords

  • setmelanotide
  • RM-493
  • obesity
  • melanocortin 4 receptor
  • hypothalamic obesity
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In context

Obesity

11,522 studies on the registry are indexed under Obesity; 2,033 are open to participants now.

This study's enrollment of 28 is below the median of 67 across 9,006 interventional studies indexed under Obesity.

Browse Obesity studies →

Lead sponsor

Rhythm Pharmaceuticals, Inc. is the lead sponsor of 29 studies on the registry; 2 are open to participants now.

Of its 19 completed or terminated interventional studies of FDA-regulated products, 14 (74%) have results posted.

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

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Who can participate

Ages eligible
2 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Eligibility criteria

Key Inclusion Criteria:

  • Males and females ≥2 years of age who have completed a previous setmelanotide clinical study and who have a condition or indication for which Rhythm plans further clinical development.
  • Agree to use a highly effective form of and follow the study contraception requirements throughout study duration and for 90 days after.
  • Demonstrated clinical benefit in the previous setmelanotide study, as determined by the Investigator.

Key Exclusion Criteria:

  • Any gene variant, syndromic, or acquired disease for which setmelanotide is currently approved in the United States (i.e., patients eligible for commercial setmelanotide (IMCIVREE®).
  • Any new or worsening depression resulting in suicidal thoughts and/or behaviors.
  • Discontinuation from a previous setmelanotide study.
  • History or close family history (parents or siblings) of melanoma.
  • Pregnant and/or breastfeeding women

Other protocol defined Inclusion/Exclusion criteria may apply.

Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

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Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
28 participants (actual)

Study arms

  • Experimental
    Setelanotide (Open-label)

    Once daily (QD) subcutaneous injection of setmelanotide

    Drug: Setmelanotide

Interventions

  • Open-label daily injections of setmelanotide

    Also known as: RM-493, Imcivree

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What researchers measure

Primary outcomes

  1. Safety and tolerability of setmelanotide assessed by frequency and severity of Adverse Events (AEs) and Serious Adverse Events (SAEs)

    Time frame: Up to 3 years

07

Study locations

13 sites
  • HonorHealth Research Institute
    Scottsdale, Arizona 85258, United States
  • UC San Diego- Rady Children's Hospital
    San Diego, California 92123, United States
  • University of Florida at Gainesville
    Gainesville, Florida 32611, United States
  • University of Michigan
    Ann Arbor, Michigan 48109, United States
  • Mayo Clinic - Rochester
    Rochester, Minnesota 55905, United States
  • Children's Minnesota
    Saint Paul, Minnesota 55102, United States
  • University of Buffalo
    Getzville, New York 14068, United States
  • M3 Wake Research, Inc
    Raleigh, North Carolina 27612, United States
  • Geisinger Health System
    Danville, Pennsylvania 17821, United States
  • WR-ClinSearch
    Chattanooga, Tennessee 37421, United States
  • Vanderbilt University School of Medicine
    Nashville, Tennessee 37232, United States
  • Seattle Children's Research Institute
    Seattle, Washington 98105, United States
  • Marshfield Clinical Research Institute
    Marshfield, Wisconsin 54449, United States
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References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jul 15, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT06596135
Responsible party
Sponsor
First posted
Sep 19, 2024
Start date
Oct 21, 2024
Primary completion
Jun 24, 2026
Completion
Jun 24, 2026
Last update
Jul 15, 2026

Study contacts

David Meeker, MD
study chair · Rhythm Pharmaceuticals, Inc.

Oversight

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

Not currently enrolling

This study is completed, as verified in Jul 2026. You cannot join it, but the record below documents what was studied.

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