Adults 18 to 55, any sex, with ADHD. Patients with the condition only — healthy volunteers not accepted.
Results — posted to ClinicalTrials.gov
Per-arm endpoint measurements with 95% confidence intervals where reported. Source: trial results section.
Permanent Product Measure of Performance (PERMP) Total Score Over the Treatment Day in the Crossover PhasePrimary· 2, 4, 8, 10, 12 and 14 hours post-dose on Day 7
The Permanent Product Measure of Performance (PERMP) is a skill adjusted math test. The PERMP score is the sum of the number of math problems attempted plus the number of math problems answered correctly in a 10-minute session. The scores range from 0-800 with higher scores indicating better performance.
Group
Value
95% CI
SPD489
312.9
± 8.59
Placebo
289.5
± 8.59
PERMP Total Score by Timepoint in the Crossover PhaseSecondary· 2, 4, 8, 10, 12 and 14 hours post-dose on Day 7
The Permanent Product Measure of Performance (PERMP) is a skill adjusted math test. The PERMP score is the sum of the number of math problems attempted plus the number of math problems answered correctly in a 10-minute session. The scores range from 0-800 with higher scores indicating better performance.
2.0 hours post-dose
Group
Value
95% CI
SPD489
301.5
± 8.78
Placebo
285.9
± 8.78
4.0 hours post-dose
Group
Value
95% CI
SPD489
314.1
± 9.16
Placebo
284.7
± 9.16
8.0 hours post-dose
Group
Value
95% CI
SPD489
311.4
± 9.07
Placebo
287.1
± 9.07
10.0 hours post-dose
Group
Value
95% CI
SPD489
313.5
± 8.82
Placebo
288.8
± 8.82
12.0 hours post-dose
Group
Value
95% CI
SPD489
318.7
± 8.77
Placebo
293.1
± 8.77
14.0 hours post-dose
Group
Value
95% CI
SPD489
318.6
± 9.03
Placebo
296.7
± 9.03
PERMP Score for the Number of Math Problems Attempted by Timepoint in the Crossover PhaseSecondary· 2, 4, 8, 10, 12 and 14 hours post-dose on Day 7
The Permanent Product Measure of Performance (PERMP) is a skill adjusted math test. The PERMP score is the sum of the number of math problems attempted plus the number of math problems answered correctly in a 10-minute session. The scores range from 0-800 with higher scores indicating better performance.
Over the treatment day
Group
Value
95% CI
SPD489
158.6
± 4.33
Placebo
146.6
± 4.33
2.0 hours post-dose
Group
Value
95% CI
SPD489
153.1
± 4.41
Placebo
144.9
± 4.41
4.0 hours post-dose
Group
Value
95% CI
SPD489
159.3
± 4.60
Placebo
144.2
± 4.60
8.0 hours post-dose
Group
Value
95% CI
SPD489
157.6
± 4.56
Placebo
145.3
± 4.56
10.0 hours post-dose
Group
Value
95% CI
SPD489
158.6
± 4.44
Placebo
146.1
± 4.44
12.0 hours post-dose
Group
Value
95% CI
SPD489
161.2
± 4.43
Placebo
148.4
± 4.43
14.0 hours post-dose
Group
Value
95% CI
SPD489
161.5
± 4.57
Placebo
150.4
± 4.57
PERMP Score for the Number of Math Problems Answered Correctly by Timepoint in the Crossover PhaseSecondary· 2, 4, 8, 10, 12 and 14 hours post-dose on Day 7
The Permanent Product Measure of Performance (PERMP) is a skill adjusted math test. The PERMP score is the sum of the number of math problems attempted plus the number of math problems answered correctly in a 10-minute session. The scores range from 0-800 with higher scores indicating better performance.
Over the treatment day
Group
Value
95% CI
SPD489
154.4
± 4.27
Placebo
142.9
± 4.27
2.0 hours post-dose
Group
Value
95% CI
SPD489
148.4
± 4.38
Placebo
141.0
± 4.38
4.0 hours post-dose
Group
Value
95% CI
SPD489
154.8
± 4.56
Placebo
140.4
± 4.56
8.0 hours post-dose
Group
Value
95% CI
SPD489
153.7
± 4.51
Placebo
141.7
± 4.51
10.0 hours post-dose
Group
Value
95% CI
SPD489
154.8
± 4.39
Placebo
142.7
± 4.39
12.0 hours post-dose
Group
Value
95% CI
SPD489
157.4
± 4.36
Placebo
144.7
± 4.36
14.0 hours post-dose
Group
Value
95% CI
SPD489
157.1
± 4.48
Placebo
146.3
± 4.48
Change From Baseline in Attention Deficit Hyperactivity Disorder Rating Scale With Prompts (ADHD-RS) Total Score at up to 28 Days in the Dose Optimization PhaseSecondary· Baseline and 7, 14, 21 and 28 days
The Attention Deficit Hyperactivity Disorder Rating Scale with Prompts (ADHD-RS) 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.
Group
Value
95% CI
SPD489
-21.4
± 7.31
ADHD-RS With Prompts Total Score in the Crossover PhaseSecondary· 7 days
The Attention Deficit Hyperactivity Disorder Rating Scale with Prompts (ADHD-RS) 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.
Group
Value
95% CI
SPD489
18.1
± 0.94
Placebo
29.6
± 0.94
Assessment of Clinical Global Impression-Severity of Illness (CGI-S) in the Dose Optimization PhaseSecondary· Baseline
CGI-S assesses the severity of the subject's condition on a 7-point scale ranging from 1 (normal, not at all ill) to 7 (among the most extremely ill)
Normal, not at all ill
Group
Value
95% CI
SPD489
0
Borderline mentally ill
Group
Value
95% CI
SPD489
0
Mildly ill
Group
Value
95% CI
SPD489
0
Moderately ill
Group
Value
95% CI
SPD489
92
Markedly ill
Group
Value
95% CI
SPD489
46
Severely ill
Group
Value
95% CI
SPD489
4
Among the most extremely ill subjects
Group
Value
95% CI
SPD489
0
Number of Participants With Improvement on Clinical Global Impression-Improvement (CGI-I) in the Dose Optimization PhaseSecondary· 7, 14, 21 and 28 days
CGI-I consists of a 7-point scale ranging from 1 (very much improved) to 7 (very much worse). Improvement is defined as a score of 1 (very much improved) or 2 (much improved) on the scale.
Group
Value
95% CI
SPD489
130
Number of Participants With Improvement on Clinical Global Impression-Improvement (CGI-I) in the Crossover PhaseSecondary· 7 days
CGI-I consists of a 7-point scale ranging from 1 (very much improved) to 7 (very much worse). Improvement is defined as a score of 1 (very much improved) or 2 (much improved) on the scale.
Group
Value
95% CI
SPD489
70
Placebo
13
Change From Baseline in the Brown Attention Deficit Disorder Scale (BADDS) Total Scores at 26 Days in the Dose Optimization PhaseSecondary· Baseline and 26 days
The BADDS assessment consists of 40 items rated on a scale from 0 (never) to 3 (almost daily). The total score ranges from 0 to 120 with increasing scores indicating more severe impairment.
Group
Value
95% CI
SPD489
-34.1
± 20.99
Level of Satisfaction With Study Treatment on Medication Satisfaction Questionnaire (MSQ) in the Dose Optimization PhaseSecondary· 26 days
MSQ is a survey rating the subject's level of satisfaction with the study treatment medication.
Very satisfied
Group
Value
95% CI
SPD489
79
Moderately satisfied
Group
Value
95% CI
SPD489
44
Not satisfied
Group
Value
95% CI
SPD489
2
Don't know
Group
Value
95% CI
SPD489
2
Change From Baseline in Adult ADHD Impact Module (AIM-A) Question 1 Score at 26 Days in the Dose Optimization PhaseSecondary· Baseline and 26 days
AIM-A is a quality of life instrument. Question 1 is 'On a scale of 1 to 10, how would you rate the overall quality of life right now?' It is rated on a scale of 1 (worst) to 10 (best).
Group
Value
95% CI
SPD489
0.9
± 1.67
Adverse events — posted to ClinicalTrials.gov
Reporting threshold: 5%.
Adverse-event reports describe events observed during the trial — not all are caused by the drug.
Publications: Europe PMC API search by NCT ID, retrieved 10 June 2026
Drug + disease cross-links: matched in real time against Drug Landscape's normalised drug + company + condition tables
Sponsor: as reported to ClinicalTrials.gov by Shire
Last refreshed: 9 June 2021
Drug Landscape aggregates and links these public records for informational use only. Always verify against the primary source before clinical or regulatory decisions. Canonical URL: https://druglandscape.com/trial/NCT00697515.