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Study Summary
This trial is studying a new medication for children and teenagers with ADHD who haven't responded well to other stimulant medications.
Eligibility Criteria
Inclusion Criteria
You may be eligible if you check “Yes” for the criteria belowTimeline
Treatment Details
Study Objectives
Outcome measures can provide a clearer picture of what you can expect from a treatment.Trial Design
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Who is running the clinical trial?
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- You have experienced physical, sexual, or emotional abuse.Your score on the ADHD-RS-5 test is 28 or higher at the start of the study.You have a problem with using drugs or alcohol, as defined by specific medical criteria.I am between 6 and 17 years old.My parent or legal guardian and I agree to follow all study requirements.I am taking medication for a condition other than ADHD that affects my brain.I experienced severe side effects in the first part of the study that would prevent me from safely taking TAK-503.You have a history of trying to harm yourself or are currently thinking about harming yourself.You have a total score of 28 or more on the ADHD Rating Scale at the beginning of the study.My intellectual functioning is appropriate for my age, as confirmed by a doctor.I have been diagnosed with ADHD by a psychiatrist.My blood pressure, both lying down and standing, is within normal range for my age, sex, and height.Your liver tests show high levels of ALT, AST, or bilirubin.Stimulant medications were not suitable or effective for me, as confirmed by my doctor.I am allergic or intolerant to guanfacine hydrochloride or any part of TAK-503.Your initial CGI-S score is 4 or higher.Your score on the CGI-S test at the beginning of the study is 4 or higher.My intellectual functioning is appropriate for my age.I am not taking ADHD medication or any other drugs that the study does not allow.My blood pressure is below the high range for my age, sex, and height.I am not using any medication that the study prohibits.Stimulant medications were not suitable or effective for me, as confirmed by my doctor.Your score on the CGI-S test at the beginning of the study is 4 or higher.I am between 6 and 17 years old.I have a history of serious heart issues.I am allergic or intolerant to guanfacine, atomoxetine, or any component of TAK-503.I have a history of serious heart issues or events related to exercise.I am a pregnant or breastfeeding woman.I have a psychiatric disorder, but it's not oppositional defiant disorder.I have low blood pressure when standing or a history of high blood pressure.I am either a child 6-12 years under 25kg or a teen 13+ years under 34kg.I can swallow pills and capsules without any issues.I have low blood pressure when standing or a history of high blood pressure.Your liver tests show high levels of ALT, AST, or bilirubin.I am a woman able to have children, not pregnant or breastfeeding, and agree to follow birth control rules.You have had cancer, are pregnant, or have a developmental delay not related to ADHD.I am taking medication for a condition other than ADHD that affects my brain.Your total score on the ADHD-RS-5 test is 28 or higher at the beginning of the study.My blood pressure is below the high range for my age, sex, and height.
- Group 1: Part A: Placebo
- Group 2: Part A: Atomoxetine hydrochloride
- Group 3: Part A: Guanfacine hydrochloride (TAK-503)
- Group 4: Part B: Guanfacine hydrochloride (TAK-503)
- Pivotal Trial - The final step before approval, pivotal trials feature drugs that have already shown basic safety & efficacy.
- Drug Has Already Been Approved - The FDA has already approved this drug, and is just seeking more data.
- All Individual Drugs Already Approved - Therapies where all constituent drugs have already been approved are likely to have better-understood side effect profiles.
- Approved for 5 Other Conditions - This treatment demonstrated efficacy for 5 other conditions.
- Screening: It may take up to 3 Weeks to process to see if you qualify in this trial.
- Treatment: The duration you will receive the treatment varies.
- Follow Ups: You may be asked to continue sharing information regarding the trial for 6 Months after you stop receiving the treatment.
Frequently Asked Questions
What is the main goal of this experiment?
"This Baseline-Week 10 study seeks to evaluate the impact of TAK-503 on adolescents and children diagnosed with ADHD, by measuring Change From Baseline in the Reaction Time (RTI) Task at Week 49. Secondary objectives include tracking changes from baseline for Stop Signal Task (SST) and Rapid Visual Information Processing (RVP), as well as Brief Psychiatric Rating Scale for Children (BPRS-C). The SST task is used to measure response inhibition; participants must respond to an arrow stimulus while ignoring any accompanying audio tones. Simultaneously, RVP evaluates sustained attention over time, testing a participant's ability to detect"
Who is qualified to participate in this investigation?
"This medical trial is recruiting two-hundred and eighty-eight patients, between the ages of six to seventeen years old, with an ADHD diagnosis. To qualify for this experiment, applicants must have a score higher than 28 on the Attention Deficit Hyperactivity Disorder Rating Scale 5 (ADHD-RS-5), as well as presenting a Clinical Global Impression Severity Score of four or greater at baseline. Furthermore, their blood pressure should be within normal ranges for age, sex and height measurements taken supine and standing both during screening visits and baselines tests. Lastly, participants need to demonstrate intellectual functioning appropriate for their age group when judged"
What is the uppermost participant number associated with this research endeavor?
"This clinical trial, administered by Takeda Development Center Americas Inc. alongside Clinical Neuroscience Solutions in Memphis and Clinical Research Partners LLC from Petersburg requires 288 entrants to meet their criteria for inclusion."
Does this clinical trial include older participants in their fifth decade or above?
"The protocol of this trial dictates that the minimum age for participation is 6 and the maximum age to be considered eligible is 17."
What therapeutic applications has Guanfacine hydrochloride (TAK-503) been proven to be effective for?
"Guanfacine hydrochloride (TAK-503) is a medically useful compound, often prescribed to treat migraine. It can also prove beneficial in managing attention deficit hyperactivity disorder, hypertensive diseases and prophylactically preventing further migraine headaches."
Are there any vacancies in this clinical trial for prospective participants?
"Affirmative. Clinicaltrials.gov provides evidence that this clinical trial, which was initially advertised on September 18th 2019, is still actively recruiting participants. There are 288 subjects needed from 23 different medical sites."
Are there any precedents of research into Guanfacine hydrochloride (TAK-503)?
"At the moment, 20 clinical trials are testing the efficacy of Guanfacine hydrochloride (TAK-503), 4 of which have reached Phase 3. Locations running these studies range from Almere to California with 94 total sites offering access to TAK-503 treatment research."
Does TAK-503 pose any risks to patients when administered?
"Our team at Power has rated the safety of Guanfacine hydrochloride (TAK-503) as 3 based on its Phase 4 status which indicates that it is approved."
Are there multiple centers in the US that are currently conducting this investigation?
"23 medical sites are currently accepting enrollees for this trial, distributed among cities such as Memphis, Petersburg and Prairie Village. It is recommended to select the closest location in order to minimize travel costs when participating."
Who else is applying?
What state do they live in?
How old are they?
What site did they apply to?
What portion of applicants met pre-screening criteria?
How many prior treatments have patients received?
Why did patients apply to this trial?
How responsive is this trial?
Most responsive sites:
- Center for Psychiatry and Behavioral Medicine, Inc.: < 24 hours
Typically responds via
Average response time
- < 1 Day
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