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SPD503

Phase 3

Attention Deficit Disorder With Hyperactivity | Small molecule | Other |Takeda Pharmaceutical Company Limited|Last Updated: Jun 10, 2021

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
RandomizedDouble-BlindPLACEBO_CONTROLLEDBiomarker
Total Trials3
Total Enrollment851
FDA Designations
No designations recorded
Clinical Trials (3)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT00150618Safety and Efficacy of SPD503 in Treating ADHD in Children and Adolescents Aged 6-17PHASE3 COMPLETED 324Mar 30, 2004Oct 7, 2004Jun 10, 2021 -
NCT00152009Safety and Efficacy of SPD503 in Treating Attention-Deficit/Hyperactivity Disorder (ADHD) in Children Aged 6-17PHASE3 COMPLETED 345Jan 29, 2003Aug 23, 2003Jun 10, 2021 -
NCT00150592Safety, Tolerability and Efficacy of SPD503 in Treating ADHD in Children Aged 6-17PHASE2 COMPLETED 182May 12, 2005Oct 5, 2005Jun 10, 2021 -
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Study Endpoints
Primary Endpoints
Change From Baseline in Attention Deficit Hyperactivity Disorder Rating Scale (ADHD-RS-IV) Score at 6 Weeks
Baseline and 6 weeks

Change in the Attention Deficit Hyperactivity Disorder Rating Scale-fourth edition (ADHD-RS-IV) total score from baseline. The ADHD-RS-IV consists of 18 items scored on a 4-point scale ranging from 0 (no symptoms) to 3 (severe symptoms) with total score ranging from 0 to 54.

Change From Baseline in Attention Deficit Hyperactivity Disorder Rating Scale (ADHD-RS-IV) Score at Up to 5 Weeks
Baseline and up to 5 weeks

Change in the Attention Deficit Hyperactivity Disorder Rating Scale-fourth edition (ADHD-RS-IV) total score from baseline. The ADHD-RS-IV consists of 18 items scored on a 4-point scale ranging from 0 (no symptoms) to 3 (severe symptoms) with total score ranging from 0 to 54.

Change From Baseline in Choice Reaction Time (CRT) at 6 Weeks
Baseline and 6 weeks

Choice reaction time (CRT) is a computerized assessment that trains the subject in holding down a press-pad and releasing the press-pad in response to stimuli presented on the screen. The task requires the subject to react as soon as a yellow dot appears in one of five locations, and the subject must respond by lifting their hand from the press-pad. This is the reaction time (RT) and ranges from 100 to 5000 msec. Lower scores indicate better performance.

Secondary Endpoints
Change From Baseline in Conner's Parent Rating Scale-revised Short Version (CPRS-R) Score at 6 Weeks
Baseline and 6 weeks
Number of Participants With Improvement in Clinical Global Impression-Improvement (CGI-I)
6 weeks
Number of Participants With Improvement in Parent Global Assessment (PGA)
6 weeks
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Study Design & Arms
AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
SPD503 (Guanfacine HCl) (1 mg)EXPERIMENTAL -
SPD503 (2 mg)EXPERIMENTAL -
SPD503 (3 mg)EXPERIMENTAL -
SPD503 (4 mg)EXPERIMENTAL -
PlaceboPLACEBO_COMPARATOR -
SPD503 (Guanfacine HCl) (2 mg)EXPERIMENTAL -
SPD503 (Guanfacine HCl)EXPERIMENTAL -
Interventions
NameTypeDescription
SPD503 (1 mg)DRUG -
SPD503 (2 mg)DRUG -
SPD503 (3 mg)DRUG -
SPD503 (4 mg)DRUG -
PlaceboDRUG -
SPD503 (Guanfacine hydrochloride) (2 mg)DRUG -
SPD503 (Guanfacine HCl)DRUG -
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Eligibility Criteria
Age Range6 Years — 17 Years
SexALL
Healthy VolunteersNo

Inclusion Criteria: * Subjects with a primary diagnosis of ADHD * Females of childbearing potential must have a negative serum beta human chorionic gonadotropin (HCG) pregnancy test * Male or non-pregnant female subject who agrees to comply with any applicable contraceptive requirements Exclusion ...

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