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Study identifier: NCT04085172 Synced from ClinicalTrials.gov · August 06, 2026
● Study status: Completed

A Study of TAK-503 in Children and Teenagers With Attention Deficit Hyperactivity Disorder (ADHD)

Condition: Attention Deficit Hyperactivity Disorder  ·  Sponsor: Shire

PhasePhase 4
Planned participants396
Who can joinAll sexes, 6 Years to 17 Years
Healthy volunteersNo

About this study

The main aim of this study is learn more about long-term TAK-503 treatment in children and teenagers with ADHD for whom earlier stimulant treatment did not work. The study has two parts (A and B). In Part A, participants will take tablets of TAK-503, atomoxetine or placebo and in Part B TAK-503 tablets.

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

Talk to the study team

No contact information is available for this study as per the public registry record.

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Locations (50)

Harmonex Neuroscience ResearchDothan, Alabama, United States
Advanced Research Center, Inc.Anaheim, California, United States
Sun Valley Research Center, Inc.Imperial, California, United States
Alliance ResearchLong Beach, California, United States
PCSD Feighner ResearchSan Diego, California, United States
Homestead Medical ResearchHomestead, Florida, United States
Clinical Neuroscience Solutions, Inc.Jacksonville, Florida, United States
Care Research Center, Inc.Miami, Florida, United States
Clinical Neuroscience Solutions, Inc.Orlando, Florida, United States
AMR Conventions Research, LtdNaperville, Illinois, United States
Collective Medical Research LLCPrairie Village, Kansas, United States
Qualmedica Research, LLCBowling Green, Kentucky, United States

+ 38 more locations — full list on the registry record.

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