Phentermine/Topiramate for Hypothalamic Obesity in Youth

This study is investigating Phentermine/Topiramate Extended Release Oral Capsule (Qsymia) for young people aged 6 to 28 with hypothalamic obesity (HO). HO is significant weight gain often seen after hypothalamic brain tumors, which can lead to serious health problems. Qsymia is approved for 'common' obesity, but hasn't been tested for HO. Researchers want to see if Qsymia is safe and effective for weight loss in this group, especially for those who experience extreme hunger (hyperphagia) or excessive daytime sleepiness. The study will compare Qsymia to a placebo (an inactive substance) to understand its effects.

Study design
This is a 28-week, double-blind, randomized, parallel-arm Phase 2 pilot trial. It plans to enroll 24 participants, who will be randomly assigned to receive either Qsymia or a placebo.
What's involved
Not specified in the trial record.
Compensation
Not stated in the trial record.
Follow-up
Participants will be monitored for treatment-emergent adverse events from the start of the study until the completion of week 28.

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NCT06299891

Efficacy and Safety of Phentermine/Topiramate in Youth With Hypothalamic Obesity

Recruiting
PHASE2Ages 6–28InterventionalTreatment
Seattle Children's Hospital
~24 participants
Updated 2025-07-28 on ClinicalTrials.gov
What's tested:Phentermine / Topiramate Extended Release Oral Capsule [Qsymia]Placebo

At a glance

Recruiting sites
2 of 2 listed sites are recruiting right now
RecruitingSuspended, closed, or not yet open
What they're measuring
Treatment-emergent adverse events
Measured over From baseline to completion of week 28
Hypothalamic Obesity
Hypothalamic Tumor
Craniopharyngioma
2 sites across 2 states
Pennsylvania1
Washington1
  • Christian L Roth, MD · PRINCIPAL_INVESTIGATOR · University of Washington, Dept. of Pediatrics
  • Shana E McCormack, MD · PRINCIPAL_INVESTIGATOR · Children's Hospital of Philadelphia

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  • Treatment-emergent adverse eventsFrom baseline to completion of week 28

    Incidence of treatment-emergent adverse events including any during withdrawal in study drug vs. placebo.