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Study identifier: NCT06299891 Synced from ClinicalTrials.gov · July 28, 2026
● Recruiting

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

Condition: Hypothalamic Obesity · Hypothalamic Tumor · Craniopharyngioma  ·  Sponsor: Seattle Children's Hospital

PhasePhase 2
Planned participants24
Who can joinAll sexes, 6 Years to 28 Years
Healthy volunteersNo

About this study

Hypothalamic obesity (HO) refers to the substantial weight gain that often complicates hypothalamic brain tumors. Children with this treatment-recalcitrant form of obesity have excess rates of metabolic sequelae compared to otherwise healthy children with similar obesity, and later experience excess mortality related to cardiometabolic disease. In this pilot trial, our objective is to gather key preliminary data about phentermine/topiramate (Ph/T) that is FDA-approved for "common" obesity but has never been tested in HO. The subset of individuals with HO who experience hyperphagia or excess daytime sleepiness may benefit from the Ph/T-induced decrease in appetite and increase in alertness. Preliminary assessments of safety, adverse events, dosing (Aim 1), as well as of efficacy (% BMI loss, Aim 2) will be made in a 28-week parallel-arm double-blinded Phase 2 placebo-controlled clinical trial in 6-28-year-old individuals with HO.

This description comes directly from the study's public registry record.

Talk to the study team

Christian L Roth, MD  ·  1-206-987-5428  ·  christian.roth@seattlechildrens.org

Stephanie Purdy  ·  1-206-987-2540  ·  stephanie.purdy@seattlechildrens.org

Always discuss trial participation with your own doctor first.

Locations (2)

The Children's Hospital of PhiladelphiaPhiladelphia, Pennsylvania, United StatesRecruiting
Seattle Children'sSeattle, Washington, United StatesRecruiting

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Source record: clinicaltrials.gov/study/NCT06299891