DYANAVEL® XR delivers
DYANAVEL XR (amphetamine) Tablets Adult ADHD Study
Proven symptom control averaged across 14 hours in a forced-dose, double-blind phase 3 study1
Improvement in Attention With DYANAVEL® XR (amphetamine) Tablet vs Placebo1
Primary endpoint: Mean Permanent Product Measure of Performance Total (PERMP-T)* score averaged across all postdose time points at visit 5 was significantly higher in the DYANAVEL XR group than the placebo group (P=0.0043).**
Study Design: This study employed a 5-week forced dose-titration phase. Eligible subjects aged 18 to 60 years were randomized to double-blind DYANAVEL® XR tablet or matching placebo, taken orally once daily beginning the day after the baseline visit. Subjects were titrated from a 5mg starting dose up by 5-mg increments each week until a final dose of 20mg for 14 ± 3 days prior to visit 5. Subjects who could not tolerate the study drug were discontinued. At Visit 5, efficacy assessments included the administration of serial PERMPs predose and at 0.5, 1, 2, 4, 8, 10, 12, 13, and 14 hours postdose. Safety and tolerability were assessed at each study visit, including direct questioning about sleep, appetite, mood, and psychotic adverse events.1
*
The PERMP is a validated, time-sensitive, skill-adjusted test consisting of math problems to be completed at multiple time points (administration of serial PERMPs). It is a robust, objective measure of the ability to initiate a task, self-monitor/stay on task, and complete written seatwork. The PERMP does not test for mathematical ability or the ability to learn math because the difficulty of problems is adjusted to the existing math skill level of each participant.3
**
Mean PERMP-T score across all post dose time points at Visit 5 (last visit) was 302.8 for DYANAVEL XR tablet and 279.6 for placebo.1
DYANAVEL XR (amphetamine) Oral Solution Pediatric Study
Continuous symptom control with no return to baseline at 13 hours in an optimized-dose,
double-blind phase 3 study2
Improvement in Attention and Behavior With
DYANAVEL® XR (amphetamine) Oral Suspension vs Placebo2
Primary endpoint: Significant improvement in SKAMP-combined score at 4 hours postdose vs placebo (P<0.0001)*2
Study Design: This dose-optimized, randomized, double-blind, placebo-controlled laboratory classroom study included 99 children aged 6 to 12 years who met DSM-IV-TR criteria for ADHD. In the 5 week open-label dose-optimization period, patients received a starting dose of 2.5 or 5mg of DYANAVEL XR taken once daily in the morning. The dose was titrated by 2.5mg to 10mg increments every 4 to 7 days until an optimal dose or the maximum daily dose of 20mg/day was reached. Patients who achieved an optimal dose during the dose optimization period entered the double blind portion of the study where they were randomized to either DYANAVEL XR at their optimal dose or placebo once daily for one week. Efficacy was assessed on the final day of the double-blind phase, by teachers and raters using the SKAMP rating scale. The primary endpoint was the change from predose in the model-adjusted average of SKAMP-combined score at 4 hours postdose. Secondary endpoints looked at change from predose SKAMP-combined scores at 1, 2, 6, 8, 10, 12 and 13 hours postdose.
*
The SKAMP (Swanson, Kotkin, Agler, M-Flynn, and Pelham) rating scale, often used in clinical trials, is a validated rating instrument, used by trained raters to specifically measure the observed classroom manifestations of ADHD. The items of the SKAMP are specific for place (the classroom) and time (a typical class period). The scale’s items describe typical behaviors in a classroom setting, and additional items that describe behaviors associated with ADHD in the classroom. The SKAMP method of assessment has been demonstrated to be a sensitive measure of attention and behavior within a lab classroom setting.4
LS, least squares.
References: 1. Cutler AJ, Childress AC, Pardo A, et al. Randomized, double-blind, placebo-controlled, fixed-dose study to evaluate the efficacy and safety of amphetamine extended-release tablets in adults with attention-deficit/hyperactivity disorder. J Clin Psychiatry. 2022;83(5):22m14438. 2. Childress AC, Wigal SB, Brams MN, et al. Efficacy and safety of amphetamine extended-release oral suspension in children with attention-deficit/hyperactivity disorder. J Child Adolesc Psycholpharmacol. 2018;28(5):306-313. 3. Data on file. Tris Pharma, Inc.4. Wigal SB, Gupta S, Guinta D, Swanson JM. Reliability and validity of the SKAMP rating scale in a laboratory school setting. Psychopharmacol Bull. 1998;34(1):47-53