ClinicalTrials.gg
Active, not recruitingNCT05774756Updated Aug 10, 2026Results posted

A Trial of Setmelanotide in Acquired Hypothalamic Obesity

A Phase 3 interventional study of Setmelanotide and Placebo in Hypothalamic Obesity, sponsored by Rhythm Pharmaceuticals, Inc.. Active, not recruiting at 28 sites in 6 countries. Open to participants aged 4 Years and older. Per ClinicalTrials.gov, last updated 2026-08-10.

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

Phase
Phase 3
Study type
Interventional
Enrollment
143
Allocation
Randomized
Ages
4 Years and older
Sex
All
01

Study summary

The goal of this trial is to learn how well Setmelanotide works to improve weight reduction, hunger, and quality of life in patients 4 years of age and older with acquired Hypothalamic Obesity (HO). To determine how well setmelanotide works and how safe it is, patients with HO will take a daily injection of either setmelanotide or placebo and complete trial assessments for 52 weeks on a therapeutic regimen.

A separate sub-study in patients with congenital HO is detailed under NCT06760546.

02

Conditions studied

  • Hypothalamic Obesity

Browse trials for

Keywords

  • melancortin 4 receptor, MC4R
03

In context

Sexual Infantilism

23 studies on the registry are indexed under Sexual Infantilism; 5 are open to participants now.

This study's enrollment of 143 is above the median of 30 across 20 interventional studies indexed under Sexual Infantilism.

Browse Sexual Infantilism 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.

04

Who can participate

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

Eligibility criteria

Key Inclusion Criteria:

  1. Documented evidence of acquired hypothalamic obesity (HO)
  2. Age 4 years and older
  3. Weight gain associated with the hypothalamic injury and a of ≥30 kg/m2 for patients ≥18 years of age or BMI ≥95th percentile for age and sex for patients 4 to \<18 years of age
  4. Agree to use a highly effective form of throughout the study and for 90 days after the study

Key Exclusion Criteria:

  1. Diagnosis of Prader-Willi syndrome (PWS) or Rapid-onset obesity with hypoventilation, hypothalamic, autonomic dysregulation, neuroendocrine tumor syndrome (ROHHADNET)
  2. Weight loss >2% in the previous 3 months for patients aged ≥18 years or >2% reduction in BMI for patients aged 4 to \<18 years
  3. Bariatric surgery or procedure within last 2 years
  4. Diagnosis of severe psychiatric disorders; any suicidal ideation, attempt or behavior
  5. Current, pulmonary, cardiac, metabolic, or oncologic disease
  6. Significant dermatologic findings relating to melanoma or pre-melanoma skin lesions (excluding non-invasive basal or squamous cell lesion)
  7. History or close family history of skin cancer or melanoma
  8. Participation in any clinical trial with an drug/device within 3 months prior to the first trial dose
  9. Previously enrolled in a clinical trial involving setmelanotide or any previous exposure to setmelanotide
  10. Inability to comply with once daily (QD) injection regimen
  11. If female, pregnant and/or breastfeeding
  12. Patients with obesity attributable to other genetic or syndromic conditions (eg, PPL [POMC, PCSK1, LEPR, collectively], BBS) prior to the hypothalamic injury.
  13. If receiving hormone replacement therapy, dose has remained stable for at least 2 months before Screening

Other protocol defined Inclusion/Exclusion criteria may apply.

Terms in these criteria, in plain language(4)

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.

BMI (body mass index)

Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.

What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.

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.

Clinically significant

Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Triple (Participant, Care provider, Investigator)
Enrollment
143 participants (actual)

Study arms

  • Experimental
    Setemelanotide

    Randomized 2:1 (Setmelanotide: Placebo)

    Drug: Setmelanotide

  • Placebo comparator
    Placebo

    Randomized 2:1 (Setmelanotide: Placebo)

    Drug: Placebo

Interventions

  • Solution for daily subcutaneous injection

    Also known as: RM-493, Imcivree

  • DrugPlacebo

    Placebo matched to setmelanotide for daily subcutaneous injection

06

What researchers measure

Primary outcomes

  1. Pivotal Cohort: Mean Percent Change From Baseline in Body Mass Index (BMI) After 52 Weeks on a Therapeutic Regimen

    BMI was calculated as weight (kg)/height (m\^2). Least square (LS) mean and standard error (SE) were calculated using analysis of covariance (ANCOVA) model.

    Time frame: Baseline, after approximately 52 Weeks on a Therapeutic Regimen (up to approximately 60 weeks)

Secondary outcomes

  1. Pivotal Cohort: Percentage of Participants With ≥5% Reduction From Baseline in BMI (≥18 Years of Age) or ≥0.2-point Reduction From Baseline in BMI Z-score (<18 Years of Age)

    BMI was calculated as weight (kg)/height (m\^2). BMI Z-Score calculated for participants \<18 years old only is a measure of relative weight adjusted for child's age, sex and height at the time of data collection. The Z-Scores were calculated using the World Health Organization's WHO 2007 BMI SAS Macro Package. A Z-score of 0 is equal to the mean of a reference population (i.e., healthy, age and sex-matched individuals). A decrease in BMI Z-score (\< 0) indicates a reduction in BMI from Baseline whereas an increase in BMI-Z score (\> 0) indicated an increase in BMI from Baseline. Baseline was defined as the most recent measurement prior to the first administration of study drug. Results below represent the percentage of estimated participants with either ≥5% BMI reduction or ≥0.2 point reduction in BMI Z-score by age in each treatment arm as calculated through the MIANALYZE SAS procedure.

    Time frame: After approximately 52 Weeks on a Therapeutic Regimen (baseline up to approximately 60 weeks)

  2. Pivotal Cohort: Percentage of Participants With ≥5% Reduction From Baseline in BMI

    BMI was calculated as weight (kg)/height (m\^2). Results below represent the percentage of estimated participants with ≥5% BMI reduction in each treatment arm as calculated through the MIANALYZE SAS procedure.

    Time frame: After approximately 52 Weeks on a Therapeutic Regimen (baseline up to approximately 60 weeks)

  3. Pivotal Cohort: Change From Baseline in Weekly Average Daily Most Hunger Score in Participants ≥12 Years of Age

    Change from baseline in hunger scores for participants ≥12 years of age with acquired hypothalamic obesity was evaluated. Hunger score ranged from 0= "not hungry at all" to 10= "hungriest possible" on an 11-point numeric rating scale. On Daily Hunger Questionnaire, each of the 2 items (average hunger and most hunger) was scored separately and averaged on weekly basis. LSM and SE were calculated using ANCOVA model.

    Time frame: Baseline, after approximately 52 Weeks on a Therapeutic Regimen (up to approximately 60 weeks)

  4. Pivotal Cohort: Percentage of Participants (≥12 Years of Age) With a ≥2-point Reduction From Baseline in the Weekly Average Daily Most Hunger Score

    Hunger score ranged from 0= "not hungry at all" to 10= "hungriest possible" on an 11-point numeric rating scale. On Daily Hunger Questionnaire, each of the 2 items (average hunger and most hunger) was scored separately and averaged on weekly basis. Results below represent the percentage of estimated participants ≥12 years of age with ≥2-point reduction in each treatment arm as calculated through the MIANALYZE SAS procedure.

    Time frame: After approximately 52 Weeks on a Therapeutic Regimen (baseline up to approximately 60 weeks)

  5. Pivotal Cohort: Mean Change From Baseline in the Weekly Average of the Symptoms of Hyperphagia Composite Score in Participants ≥12 Years of Age

    Participants ≥12 years of age who were able to self-report were administered the Symptoms of Hyperphagia: Patient (Version 1.0). The questionnaire consisted of 4 items related to the frequency of a participant's hunger symptoms on a scale (Never, 1 or 2 times, 3 or more times) over the past 24 hours. The scores on this scale range from 0 to 2 with higher scores indicating more hyperphagia. Daily composite score was derived as the sum of daily answered questions divided by the number of answered questions per day. The weekly average of the daily composite scores equals to the sum of daily composite scores divided by the number of days with a composite score within the 7 identified days prior to the visit. LSM and SE were calculated using ANCOVA model.

    Time frame: Baseline, after approximately 52 Weeks on a Therapeutic Regimen (up to approximately 60 weeks)

  6. Pivotal Cohort: Percentage of Participants With a ≥10% Reduction From Baseline in BMI

    BMI was calculated as weight (kg)/height (m\^2). Results below represent the percentage of estimated participants with ≥10% BMI reduction in each treatment arm as calculated through the MIANALYZE SAS procedure.

    Time frame: After approximately 52 Weeks on a Therapeutic Regimen (baseline up to approximately 60 weeks)

  7. Pivotal Cohort: Percentage of Participants With a ≥10% Reduction From Baseline in Body Weight

    Body weight was captured for analysis in kilograms. Results below represent the percentage of estimated participants with ≥10% reduction in body weight in each treatment arm as calculated through the MIANALYZE SAS procedure.

    Time frame: After approximately 52 Weeks on a Therapeutic Regimen (baseline up to approximately 60 weeks)

  8. Pivotal Cohort: Mean Percent Change From Baseline in Body Weight in Participants ≥18 Years

    Body weight was captured for analysis in kilograms. LSM and SE were calculated using ANCOVA model.

    Time frame: Baseline, after approximately 52 Weeks on a Therapeutic Regimen (up to approximately 60 weeks)

  9. Pivotal Cohort: Mean Change From Baseline in BMI Z-Score in Participants <18 Years of Age

    BMI was calculated as weight (kg)/height (m\^2). BMI Z-Score calculated for participants \<18 years old only is a measure of relative weight adjusted for child's age, sex and height at the time of data collection. The Z-Scores were calculated using the World Health Organization's WHO 2007 BMI SAS Macro Package. A Z-score of 0 is equal to the mean of a reference population (i.e., healthy, age and sex-matched individuals). A decrease in BMI Z-score (\< 0) indicates a reduction in BMI from Baseline whereas an increase in BMI-Z score (\> 0) indicates an increase in BMI from Baseline. Baseline was defined as the most recent measurement prior to the first administration of study drug. LSM and SE were calculated using ANCOVA model.

    Time frame: Baseline, after approximately 52 Weeks on a Therapeutic Regimen (up to approximately 60 weeks)

  10. Pivotal Cohort: Mean Change From Baseline in Percent of BMI 95th Percentile in Participants <18 Years of Age

    BMI was calculated using participant's weight and height assessments, using the following formula: BMI = kg/m\^2. BMI percentile scores are measures of relative weight adjusted for child's age and gender. The percent of the BMI 95th percentile score expresses the participant's BMI as a percentage of the Centers for Disease Control (CDC) 95th percentile reference population. Baseline was defined as the most recent measurement prior to the first administration of study drug. LSM and SE were calculated using ANCOVA model.

    Time frame: Baseline, after approximately 52 Weeks on a Therapeutic Regimen (up to approximately 60 weeks)

  11. Pivotal Cohort: Percentage of Participants <18 Years of Age With ≥0.2-Point Reduction From Baseline in BMI Z-Score

    BMI was calculated as weight (kg)/height (m\^2). BMI Z-Score calculated for participants \<18 years old only is a measure of relative weight adjusted for child's age, sex and height at the time of data collection. The Z-Scores were calculated using the World Health Organization's WHO 2007 BMI SAS Macro Package. A Z-score of 0 is equal to the mean of a reference population (i.e., healthy, age and sex-matched individuals). A decrease in BMI Z-score (\< 0) indicates a reduction in BMI from Baseline whereas an increase in BMI-Z score (\> 0) indicates an increase in BMI from Baseline. Baseline was defined as the most recent measurement prior to the first administration of study drug. Results below represent the percentage of estimated participants with ≥0.2 point reduction in BMI Z-score in each treatment arm and the difference between the treatment arms as calculated through the MIANALYZE SAS procedure.

    Time frame: After approximately 52 Weeks on a Therapeutic Regimen (baseline up to approximately 60 weeks)

  12. Pivotal Cohort: Percentage of Participants With BMI <30 kg/m^2 (Aged ≥18 Years) or <95th Percentile (Aged <18 Years) From Baseline

    BMI was calculated using participant's weight and height assessments, using the following formula: BMI = kg/m\^2. BMI Percentile scores are measures of relative weight adjusted for child's age and gender. The percent of the BMI 95th percentile score expresses the participant's BMI as a percentage of the CDC 95th percentile reference population. Baseline was defined as the most recent measurement prior to the first administration of study drug. Results below represent the percentage of estimated participants with either BMI \<30 kg/m\^2 (aged ≥18 years) or \<95th percentile (aged \<18 years) in each treatment arm and the difference between the treatment arms as calculated through the MIANALYZE SAS procedure.

    Time frame: After approximately 52 Weeks on a Therapeutic Regimen (baseline up to approximately 60 weeks)

  13. Pivotal Cohort: Mean Change From Baseline in Physical Functioning Score and Total Score on the Impact of Weight on Quality of Life-Lite (IWQOL)

    The IWQOL-Lite-Clinical Trials (administered to participants ≥18 years of age) is a validated 20-item self-report measure of obesity-specific quality of life questionnaire. It assessed 2 primary domains of obesity-related health-related quality of life (HRQoL): physical (7 items) and psychosocial (13 items). Each item was rated on a scale from 0 (worst) to 100 (best), with higher scores indicating better levels of functioning. It provided composite scores for each domain, as well as a total score, all ranging from 0 (worst) to 100 (best). Higher scores reflect better levels of functioning and quality of life. LSM and SE were calculated using ANCOVA model.

    Time frame: Baseline, after approximately 52 Weeks on a Therapeutic Regimen (up to approximately 60 weeks)

  14. Pivotal Cohort: Mean Change From Baseline in Total Score on the Impact of Weight on Quality of Life-Kids (IWQOL-Kids)

    The IWQOL-Kids (administered to participants between the ages of 11 and \<18 years) is a validated 27-item self-report measure of weight-related quality of life for youth. It provided a total score inclusive of 4 domains: physical comfort, body esteem, social life, and family relations. Results below represent the total score, which is rated on a scale from 0 (worst) to 100 (best), with higher scores indicating better levels of functioning. LSM and SE were calculated using ANCOVA model.

    Time frame: Baseline, after approximately 52 Weeks on a Therapeutic Regimen (up to approximately 60 weeks)

  15. Pivotal Cohort: Mean Change From Baseline in Waist Circumference

    Waist circumference was captured for analysis in centimeters. LSM and SE were calculated using ANCOVA model.

    Time frame: Baseline, after approximately 52 Weeks on a Therapeutic Regimen (up to approximately 60 weeks)

  16. Pivotal Cohort: Change From Baseline in Systolic and Diastolic Blood Pressure

    Blood pressure was calculated in millimeters of mercury.

    Time frame: Baseline, after approximately 52 Weeks on a Therapeutic Regimen (up to approximately 60 weeks)

07

Results

Posted May 29, 2026

Participant flow

Participant flow — Overall Study
MilestoneSetmelanotidePlacebo
Started9548
Received at least 1 dose of study drug9448
Modified intent to treat pivotal cohort8139
Completed7238
Not completed2310
Withdrew: Adverse event31
Withdrew: Death10
Withdrew: Withdrawal by subject41
Withdrew: Randomized, not treated10
Withdrew: Ongoing138
Withdrew: Withdrawal by parent/guardian10

Outcome measures

PrimaryPivotal Cohort: Mean Percent Change From Baseline in Body Mass Index (BMI) After 52 Weeks on a Therapeutic Regimen

BMI was calculated as weight (kg)/height (m\^2). Least square (LS) mean and standard error (SE) were calculated using analysis of covariance (ANCOVA) model.

Time frame:
Baseline, after approximately 52 Weeks on a Therapeutic Regimen (up to approximately 60 weeks)
Reported as:
Least squares mean · Percent change
Pivotal Cohort: Mean Percent Change From Baseline in Body Mass Index (BMI) After 52 Weeks on a Therapeutic Regimen
Percent changeSetmelanotidePlacebo
Pivotal Cohort: Mean Percent Change From Baseline in Body Mass Index (BMI) After 52 Weeks on a Therapeutic Regimen-16.51 ± 1.4013.32 ± 1.984
Statistical analysis
  • Setmelanotide vs Placebo · ANCOVA · p = <0.0001 · Least square mean difference: -19.83 · 95% CI -24.55 to -15.10The model was adjusted with the stratification factors of age group and subpopulation.
SecondaryPivotal Cohort: Percentage of Participants With ≥5% Reduction From Baseline in BMI (≥18 Years of Age) or ≥0.2-point Reduction From Baseline in BMI Z-score (<18 Years of Age)

BMI was calculated as weight (kg)/height (m\^2). BMI Z-Score calculated for participants \<18 years old only is a measure of relative weight adjusted for child's age, sex and height at the time of data collection. The Z-Scores were calculated using the World Health Organization's WHO 2007 BMI SAS Macro Package. A Z-score of 0 is equal to the mean of a reference population (i.e., healthy, age and sex-matched individuals). A decrease in BMI Z-score (\< 0) indicates a reduction in BMI from Baseline whereas an increase in BMI-Z score (\> 0) indicated an increase in BMI from Baseline. Baseline was defined as the most recent measurement prior to the first administration of study drug. Results below represent the percentage of estimated participants with either ≥5% BMI reduction or ≥0.2 point reduction in BMI Z-score by age in each treatment arm as calculated through the MIANALYZE SAS procedure.

Time frame:
After approximately 52 Weeks on a Therapeutic Regimen (baseline up to approximately 60 weeks)
Reported as:
Number · Calculated estimate: % of participants
Pivotal Cohort: Percentage of Participants With ≥5% Reduction From Baseline in BMI (≥18 Years of Age) or ≥0.2-point Reduction From Baseline in BMI Z-score (<18 Years of Age)
Calculated estimate: % of participantsSetmelanotidePlacebo
Pivotal Cohort: Percentage of Participants With ≥5% Reduction From Baseline in BMI (≥18 Years of Age) or ≥0.2-point Reduction From Baseline in BMI Z-score (<18 Years of Age)82.73 (74.13 to 91.33)20.90 (8.01 to 33.78)
SecondaryPivotal Cohort: Percentage of Participants With ≥5% Reduction From Baseline in BMI

BMI was calculated as weight (kg)/height (m\^2). Results below represent the percentage of estimated participants with ≥5% BMI reduction in each treatment arm as calculated through the MIANALYZE SAS procedure.

Time frame:
After approximately 52 Weeks on a Therapeutic Regimen (baseline up to approximately 60 weeks)
Reported as:
Number · Calculated estimate: % of participants
Pivotal Cohort: Percentage of Participants With ≥5% Reduction From Baseline in BMI
Calculated estimate: % of participantsSetmelanotidePlacebo
Pivotal Cohort: Percentage of Participants With ≥5% Reduction From Baseline in BMI79.53 (70.60 to 88.47)10.41 (0.75 to 20.07)
SecondaryPivotal Cohort: Change From Baseline in Weekly Average Daily Most Hunger Score in Participants ≥12 Years of Age

Change from baseline in hunger scores for participants ≥12 years of age with acquired hypothalamic obesity was evaluated. Hunger score ranged from 0= "not hungry at all" to 10= "hungriest possible" on an 11-point numeric rating scale. On Daily Hunger Questionnaire, each of the 2 items (average hunger and most hunger) was scored separately and averaged on weekly basis. LSM and SE were calculated using ANCOVA model.

Time frame:
Baseline, after approximately 52 Weeks on a Therapeutic Regimen (up to approximately 60 weeks)
Reported as:
Least squares mean · Score on a scale
Pivotal Cohort: Change From Baseline in Weekly Average Daily Most Hunger Score in Participants ≥12 Years of Age
Score on a scaleSetmelanotidePlacebo
Pivotal Cohort: Change From Baseline in Weekly Average Daily Most Hunger Score in Participants ≥12 Years of Age-2.73 ± 0.279-1.45 ± 0.399
SecondaryPivotal Cohort: Percentage of Participants (≥12 Years of Age) With a ≥2-point Reduction From Baseline in the Weekly Average Daily Most Hunger Score

Hunger score ranged from 0= "not hungry at all" to 10= "hungriest possible" on an 11-point numeric rating scale. On Daily Hunger Questionnaire, each of the 2 items (average hunger and most hunger) was scored separately and averaged on weekly basis. Results below represent the percentage of estimated participants ≥12 years of age with ≥2-point reduction in each treatment arm as calculated through the MIANALYZE SAS procedure.

Time frame:
After approximately 52 Weeks on a Therapeutic Regimen (baseline up to approximately 60 weeks)
Reported as:
Number · Calculated estimate: % of participants
Pivotal Cohort: Percentage of Participants (≥12 Years of Age) With a ≥2-point Reduction From Baseline in the Weekly Average Daily Most Hunger Score
Calculated estimate: % of participantsSetmelanotidePlacebo
Pivotal Cohort: Percentage of Participants (≥12 Years of Age) With a ≥2-point Reduction From Baseline in the Weekly Average Daily Most Hunger Score61.04 (47.01 to 75.06)45.04 (24.56 to 65.52)
SecondaryPivotal Cohort: Mean Change From Baseline in the Weekly Average of the Symptoms of Hyperphagia Composite Score in Participants ≥12 Years of Age

Participants ≥12 years of age who were able to self-report were administered the Symptoms of Hyperphagia: Patient (Version 1.0). The questionnaire consisted of 4 items related to the frequency of a participant's hunger symptoms on a scale (Never, 1 or 2 times, 3 or more times) over the past 24 hours. The scores on this scale range from 0 to 2 with higher scores indicating more hyperphagia. Daily composite score was derived as the sum of daily answered questions divided by the number of answered questions per day. The weekly average of the daily composite scores equals to the sum of daily composite scores divided by the number of days with a composite score within the 7 identified days prior to the visit. LSM and SE were calculated using ANCOVA model.

Time frame:
Baseline, after approximately 52 Weeks on a Therapeutic Regimen (up to approximately 60 weeks)
Reported as:
Least squares mean · Score on a scale
Pivotal Cohort: Mean Change From Baseline in the Weekly Average of the Symptoms of Hyperphagia Composite Score in Participants ≥12 Years of Age
Score on a scaleSetmelanotidePlacebo
Pivotal Cohort: Mean Change From Baseline in the Weekly Average of the Symptoms of Hyperphagia Composite Score in Participants ≥12 Years of Age-0.30 ± 0.029-0.14 ± 0.042
SecondaryPivotal Cohort: Percentage of Participants With a ≥10% Reduction From Baseline in BMI

BMI was calculated as weight (kg)/height (m\^2). Results below represent the percentage of estimated participants with ≥10% BMI reduction in each treatment arm as calculated through the MIANALYZE SAS procedure.

Time frame:
After approximately 52 Weeks on a Therapeutic Regimen (baseline up to approximately 60 weeks)
Reported as:
Number · Calculated estimate: % of participants
Pivotal Cohort: Percentage of Participants With a ≥10% Reduction From Baseline in BMI
Calculated estimate: % of participantsSetmelanotidePlacebo
Pivotal Cohort: Percentage of Participants With a ≥10% Reduction From Baseline in BMI63.02 (52.50 to 73.55)5.18 (0.00 to 12.17)
SecondaryPivotal Cohort: Percentage of Participants With a ≥10% Reduction From Baseline in Body Weight

Body weight was captured for analysis in kilograms. Results below represent the percentage of estimated participants with ≥10% reduction in body weight in each treatment arm as calculated through the MIANALYZE SAS procedure.

Time frame:
After approximately 52 Weeks on a Therapeutic Regimen (baseline up to approximately 60 weeks)
Reported as:
Number · Calculated estimate: % of participants
Pivotal Cohort: Percentage of Participants With a ≥10% Reduction From Baseline in Body Weight
Calculated estimate: % of participantsSetmelanotidePlacebo
Pivotal Cohort: Percentage of Participants With a ≥10% Reduction From Baseline in Body Weight55.60 (44.77 to 66.44)0.05 (0.00 to 1.05)
SecondaryPivotal Cohort: Mean Percent Change From Baseline in Body Weight in Participants ≥18 Years

Body weight was captured for analysis in kilograms. LSM and SE were calculated using ANCOVA model.

Time frame:
Baseline, after approximately 52 Weeks on a Therapeutic Regimen (up to approximately 60 weeks)
Reported as:
Least squares mean · Percent change
Pivotal Cohort: Mean Percent Change From Baseline in Body Weight in Participants ≥18 Years
Percent changeSetmelanotidePlacebo
Pivotal Cohort: Mean Percent Change From Baseline in Body Weight in Participants ≥18 Years-16.51 ± 2.2972.44 ± 3.228
SecondaryPivotal Cohort: Mean Change From Baseline in BMI Z-Score in Participants <18 Years of Age

BMI was calculated as weight (kg)/height (m\^2). BMI Z-Score calculated for participants \<18 years old only is a measure of relative weight adjusted for child's age, sex and height at the time of data collection. The Z-Scores were calculated using the World Health Organization's WHO 2007 BMI SAS Macro Package. A Z-score of 0 is equal to the mean of a reference population (i.e., healthy, age and sex-matched individuals). A decrease in BMI Z-score (\< 0) indicates a reduction in BMI from Baseline whereas an increase in BMI-Z score (\> 0) indicates an increase in BMI from Baseline. Baseline was defined as the most recent measurement prior to the first administration of study drug. LSM and SE were calculated using ANCOVA model.

Time frame:
Baseline, after approximately 52 Weeks on a Therapeutic Regimen (up to approximately 60 weeks)
Reported as:
Least squares mean · Z-Score
Pivotal Cohort: Mean Change From Baseline in BMI Z-Score in Participants <18 Years of Age
Z-ScoreSetmelanotidePlacebo
Pivotal Cohort: Mean Change From Baseline in BMI Z-Score in Participants <18 Years of Age-1.47 ± 0.129-0.12 ± 0.180
SecondaryPivotal Cohort: Mean Change From Baseline in Percent of BMI 95th Percentile in Participants <18 Years of Age

BMI was calculated using participant's weight and height assessments, using the following formula: BMI = kg/m\^2. BMI percentile scores are measures of relative weight adjusted for child's age and gender. The percent of the BMI 95th percentile score expresses the participant's BMI as a percentage of the Centers for Disease Control (CDC) 95th percentile reference population. Baseline was defined as the most recent measurement prior to the first administration of study drug. LSM and SE were calculated using ANCOVA model.

Time frame:
Baseline, after approximately 52 Weeks on a Therapeutic Regimen (up to approximately 60 weeks)
Reported as:
Least squares mean · Percent of BMI 95th Percentile
Pivotal Cohort: Mean Change From Baseline in Percent of BMI 95th Percentile in Participants <18 Years of Age
Percent of BMI 95th PercentileSetmelanotidePlacebo
Pivotal Cohort: Mean Change From Baseline in Percent of BMI 95th Percentile in Participants <18 Years of Age-26.30 ± 2.279-0.14 ± 3.284
SecondaryPivotal Cohort: Percentage of Participants <18 Years of Age With ≥0.2-Point Reduction From Baseline in BMI Z-Score

BMI was calculated as weight (kg)/height (m\^2). BMI Z-Score calculated for participants \<18 years old only is a measure of relative weight adjusted for child's age, sex and height at the time of data collection. The Z-Scores were calculated using the World Health Organization's WHO 2007 BMI SAS Macro Package. A Z-score of 0 is equal to the mean of a reference population (i.e., healthy, age and sex-matched individuals). A decrease in BMI Z-score (\< 0) indicates a reduction in BMI from Baseline whereas an increase in BMI-Z score (\> 0) indicates an increase in BMI from Baseline. Baseline was defined as the most recent measurement prior to the first administration of study drug. Results below represent the percentage of estimated participants with ≥0.2 point reduction in BMI Z-score in each treatment arm and the difference between the treatment arms as calculated through the MIANALYZE SAS procedure.

Time frame:
After approximately 52 Weeks on a Therapeutic Regimen (baseline up to approximately 60 weeks)
Reported as:
Number · Calculated estimate: % of participants
Pivotal Cohort: Percentage of Participants <18 Years of Age With ≥0.2-Point Reduction From Baseline in BMI Z-Score
Calculated estimate: % of participantsSetmelanotidePlacebo
Pivotal Cohort: Percentage of Participants <18 Years of Age With ≥0.2-Point Reduction From Baseline in BMI Z-Score89.31 (80.08 to 98.54)31.09 (11.93 to 50.24)
SecondaryPivotal Cohort: Percentage of Participants With BMI <30 kg/m^2 (Aged ≥18 Years) or <95th Percentile (Aged <18 Years) From Baseline

BMI was calculated using participant's weight and height assessments, using the following formula: BMI = kg/m\^2. BMI Percentile scores are measures of relative weight adjusted for child's age and gender. The percent of the BMI 95th percentile score expresses the participant's BMI as a percentage of the CDC 95th percentile reference population. Baseline was defined as the most recent measurement prior to the first administration of study drug. Results below represent the percentage of estimated participants with either BMI \<30 kg/m\^2 (aged ≥18 years) or \<95th percentile (aged \<18 years) in each treatment arm and the difference between the treatment arms as calculated through the MIANALYZE SAS procedure.

Time frame:
After approximately 52 Weeks on a Therapeutic Regimen (baseline up to approximately 60 weeks)
Reported as:
Number · Calculated estimate: % of participants
Pivotal Cohort: Percentage of Participants With BMI <30 kg/m^2 (Aged ≥18 Years) or <95th Percentile (Aged <18 Years) From Baseline
Calculated estimate: % of participantsSetmelanotidePlacebo
Pivotal Cohort: Percentage of Participants With BMI <30 kg/m^2 (Aged ≥18 Years) or <95th Percentile (Aged <18 Years) From Baseline39.95 (29.18 to 50.72)12.82 (4.30 to 27.43)
SecondaryPivotal Cohort: Mean Change From Baseline in Physical Functioning Score and Total Score on the Impact of Weight on Quality of Life-Lite (IWQOL)

The IWQOL-Lite-Clinical Trials (administered to participants ≥18 years of age) is a validated 20-item self-report measure of obesity-specific quality of life questionnaire. It assessed 2 primary domains of obesity-related health-related quality of life (HRQoL): physical (7 items) and psychosocial (13 items). Each item was rated on a scale from 0 (worst) to 100 (best), with higher scores indicating better levels of functioning. It provided composite scores for each domain, as well as a total score, all ranging from 0 (worst) to 100 (best). Higher scores reflect better levels of functioning and quality of life. LSM and SE were calculated using ANCOVA model.

Time frame:
Baseline, after approximately 52 Weeks on a Therapeutic Regimen (up to approximately 60 weeks)
Reported as:
Least squares mean · Score on a scale
Pivotal Cohort: Mean Change From Baseline in Physical Functioning Score and Total Score on the Impact of Weight on Quality of Life-Lite (IWQOL)
Score on a scaleSetmelanotidePlacebo
IWQOL-Lite-CT-Physical Function Score31.32 ± 3.702-4.46 ± 5.145
IWQOL-Lite-CT-Total Score32.04 ± 3.0593.00 ± 4.249
SecondaryPivotal Cohort: Mean Change From Baseline in Total Score on the Impact of Weight on Quality of Life-Kids (IWQOL-Kids)

The IWQOL-Kids (administered to participants between the ages of 11 and \<18 years) is a validated 27-item self-report measure of weight-related quality of life for youth. It provided a total score inclusive of 4 domains: physical comfort, body esteem, social life, and family relations. Results below represent the total score, which is rated on a scale from 0 (worst) to 100 (best), with higher scores indicating better levels of functioning. LSM and SE were calculated using ANCOVA model.

Time frame:
Baseline, after approximately 52 Weeks on a Therapeutic Regimen (up to approximately 60 weeks)
Reported as:
Least squares mean · Score on a scale
Pivotal Cohort: Mean Change From Baseline in Total Score on the Impact of Weight on Quality of Life-Kids (IWQOL-Kids)
Score on a scaleSetmelanotidePlacebo
Pivotal Cohort: Mean Change From Baseline in Total Score on the Impact of Weight on Quality of Life-Kids (IWQOL-Kids)22.05 ± 4.7087.92 ± 4.001
SecondaryPivotal Cohort: Mean Change From Baseline in Waist Circumference

Waist circumference was captured for analysis in centimeters. LSM and SE were calculated using ANCOVA model.

Time frame:
Baseline, after approximately 52 Weeks on a Therapeutic Regimen (up to approximately 60 weeks)
Reported as:
Least squares mean · Centimeters
Pivotal Cohort: Mean Change From Baseline in Waist Circumference
CentimetersSetmelanotidePlacebo
Pivotal Cohort: Mean Change From Baseline in Waist Circumference-11.58 ± 1.1613.85 ± 1.584
SecondaryPivotal Cohort: Change From Baseline in Systolic and Diastolic Blood Pressure

Blood pressure was calculated in millimeters of mercury.

Time frame:
Baseline, after approximately 52 Weeks on a Therapeutic Regimen (up to approximately 60 weeks)
Reported as:
Mean · Millimeters of mercury
Pivotal Cohort: Change From Baseline in Systolic and Diastolic Blood Pressure
Millimeters of mercurySetmelanotidePlacebo
Systolic blood pressure-2.16 ± 11.5872.84 ± 11.438
Diastolic blood pressure-0.88 ± 7.4802.71 ± 9.789

Adverse events

Collected over Baseline up to Week 62. Non-serious events are listed at a 5% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Setmelanotide2/95 (2.1%)26/94 (27.7%)94/94 (100%)
Placebo0/48 (0%)3/48 (6.3%)46/48 (95.8%)
Most frequent serious events
Showing 10 of 32
Most frequent serious events
EventSetmelanotidePlacebo
Adrenal insufficiencyEndocrine disorders3/940/48
COVID-19Infections and infestations2/940/48
CellulitisInfections and infestations2/940/48
Adrenocortical insufficiency acuteEndocrine disorders2/940/48
HypernatraemiaMetabolism and nutrition disorders2/941/48
Carotid artery aneurysmNervous system disorders0/941/48
Status migrainosusNervous system disorders0/941/48
VomitingGastrointestinal disorders1/941/48
AppendicitisInfections and infestations1/940/48
GastroenteritisInfections and infestations1/940/48
Most frequent other events
Showing 10 of 51
Most frequent other events
EventSetmelanotidePlacebo
Skin hyperpigmentationSkin and subcutaneous tissue disorders52/9411/48
NauseaGastrointestinal disorders49/9417/48
VomitingGastrointestinal disorders36/9414/48
HeadacheNervous system disorders34/9418/48
DiarrhoeaGastrointestinal disorders19/9414/48
Injection site reactionGeneral disorders21/9411/48
FatigueGeneral disorders10/949/48
Erection increasedReproductive system and breast disorders4/403/17
Injection site erythemaGeneral disorders16/948/48
Injection site pruritusGeneral disorders16/948/48

Baseline characteristics

Modified intent to treat (mITT) analysis set included all randomized participants who were exposed to at least 1 dose of study treatment.

Age, Continuous
Age, Continuous(years)SetmelanotidePlaceboTotal
Mean20.6 ± 13.3522.9 ± 16.3121.4 ± 14.40
Sex: Female, Male
Sex: Female, Male(Participants)SetmelanotidePlaceboTotal
Female543185
Male401757
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)SetmelanotidePlaceboTotal
Hispanic or Latino8816
Not Hispanic or Latino8540125
Unknown or Not Reported101
Race (NIH/OMB)
Race (NIH/OMB)(Participants)SetmelanotidePlaceboTotal
American Indian or Alaska Native000
Asian11516
Native Hawaiian or Other Pacific Islander000
Black or African American617
White7136107
More than one race000
Unknown or Not Reported6612
Region of Enrollment
Region of Enrollment(participants)SetmelanotidePlaceboTotal
Canada538
Netherlands7512
United States573188
Japan8412
United Kingdom9110
Germany8412
Body Mass Index
Body Mass Index(kilograms (kg)/square meter (m^2))SetmelanotidePlaceboTotal
Mean35.73 ± 9.17336.78 ± 9.33236.07 ± 9.199
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Study locations

28 sites
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References and documents

Publications

  • Miller JL, van Santen HM, Phillips SA, Hamilton J, Aberle J, Sathyapalan T, Mohamed Z, McCormack SE, Shoemaker AH, Kelsey MM, Ghalib L, Stalla G, Thaker VV, Habiby R, Ode KL, Wabitsch M, Dattani M, Abuzzahab MJ, Abdullatif H, Morgan R, Stefater-Richards M, Aroda VR, Friedrich C, Han JC, Ono H, Nagasaki K, Tanaka T, Isojima T, Arima H, Scimia C, Yuan G, Muller HL, Roth CL; TRANSCEND Trial Group. Setmelanotide for the Treatment of Acquired Hypothalamic Obesity. N Engl J Med. 2026 Jul 9;395(2):138-150. doi: 10.1056/NEJMoa2512275. PubMed 42418774 ↗
  • Roth CL, Phillips SA, McCormack SE, Ode KL, Kelsey MM, Liu J, Ervin C, Mallya UG, Norcross L, Miller JL. Quality of life improvements with setmelanotide treatment in acquired hypothalamic obesity: TRANSCEND trial interview results from US participants. Front Behav Neurosci. 2026 Jul 15;20:1830070. doi: 10.3389/fnbeh.2026.1830070. eCollection 2026. PubMed 42528856 ↗

Study documents

PDFs hosted by the registry, ClinicalTrials.gov.

Individual participant data

Plan to share: No

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Aug 10, 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
NCT05774756
Responsible party
Sponsor
First posted
Mar 20, 2023
Start date
Apr 26, 2023
Primary completion
Mar 18, 2025
Completion
Apr 16, 2027 (estimated)
Results posted
May 29, 2026
Last update
Aug 10, 2026

Study contacts

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

Oversight

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

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Studies of the drug tested here: Setmelanotide

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