Long-term safety and efficacy of lisdexamfetamine dimesylate in children and adolescents with ADHD: a phase IV, 2-year, open-label study in Europe
Background: Attention-deficit/hyperactivity disorder (ADHD) is increasingly recognized as a persistent disorder requiring long-term management. Objectives: Our objective was to evaluate the 2-year safety and efficacy of lisdexamfetamine dimesylate (LDX) in children and adolescents with ADHD. Methods...
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| Hauptverfasser: | , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
30 June 2017
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| In: |
CNS drugs
Year: 2017, Jahrgang: 31, Heft: 7, Pages: 625-638 |
| ISSN: | 1179-1934 |
| DOI: | 10.1007/s40263-017-0443-y |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1007/s40263-017-0443-y Verlag, Volltext: https://link.springer.com/article/10.1007/s40263-017-0443-y 
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| Verfasserangaben: | David R. Coghill, Tobias Banaschewski, Peter Nagy, Isabel Hernández Otero, César Soutullo, Brian Yan, Beatriz Caballero, Alessandro Zuddas |
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| 245 | 1 | 0 | |a Long-term safety and efficacy of lisdexamfetamine dimesylate in children and adolescents with ADHD |b a phase IV, 2-year, open-label study in Europe |c David R. Coghill, Tobias Banaschewski, Peter Nagy, Isabel Hernández Otero, César Soutullo, Brian Yan, Beatriz Caballero, Alessandro Zuddas |
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| 520 | |a Background: Attention-deficit/hyperactivity disorder (ADHD) is increasingly recognized as a persistent disorder requiring long-term management. Objectives: Our objective was to evaluate the 2-year safety and efficacy of lisdexamfetamine dimesylate (LDX) in children and adolescents with ADHD. Methods: Participants (aged 6-17 years) with ADHD received open-label, dose-optimized LDX 30, 50, or 70 mg/day for 104 weeks. Safety monitoring included treatment-emergent adverse events (TEAEs), vital signs, electrocardiography, and growth. The TEAEs decreased appetite, weight decrease, insomnia events (including insomnia, initial insomnia, middle insomnia, and terminal insomnia), headache, and psychiatric TEAEs were pre-defined as being of special interest. Efficacy was assessed as a secondary objective using the ADHD Rating Scale IV (ADHD-RS-IV), the Clinical Global Impressions-Improvement (CGI-I) scale, and the CGI-Severity (CGI-S) scale. Results: Of 314 participants enrolled, 191 completed the study. TEAEs were reported in 89.8% of participants, led to discontinuation in 12.4%, and were reported as serious in 8.9%. TEAEs that were reported by ≥5% of participants and considered by investigators as related to LDX were decreased appetite (49.4%), weight decrease (18.2%), insomnia (13.1%), initial insomnia (8.9%), irritability (8.6%), nausea (6.7%), headache (5.7%), and tic (5.1%). The median time to first onset and duration, respectively, of TEAEs of special interest were as follows: decreased appetite, 13.5 and 169.0 days; weight decrease, 29.0 and 225.0 days; insomnia, 17.0 and 42.8 days; and headache, 22.0 and 2.0 days. Reports of decreased appetite, weight decrease, insomnia, and headache were highest in the first 4-12 weeks. Psychiatric TEAEs were infrequent: psychosis and mania (n = 1), suicidal events (suicidal ideation, n = 2; suicide attempt, n = 1), and aggression events (aggression, n = 14; anger, n = 2; hostility, n = 1). At the last on-treatment assessment (LOTA), mean increases from baseline in vital signs were as follows: pulse rate, 7.0 bpm (95% confidence interval [CI] 5.7-8.2); systolic blood pressure (SBP), 3.4 mmHg (95% CI 2.2-4.5); and diastolic blood pressure (DBP), 3.2 mmHg (95% CI 2.2-4.2). Pre-defined thresholds for a potentially clinically important (PCI) high pulse rate were met at one or more visits by 22 participants (7.0%), for PCI high SBP were met by 45 children (22.4%) and 17 adolescents (15.2%), and for PCI high DBP were met by 78 children (38.8%) and 24 adolescents (21.4%). The mean QT interval corrected using Fridericia’s formula (QTcF) decreased from baseline to LOTA (-0.6 ms [95% CI -2.3 to 1.2]; range -50 to +53). Mean changes in growth from baseline to LOTA were weight, 2.1 kg (95% CI 1.5-2.8); height, 6.1 cm (95% CI 5.6-6.7); and body mass index (BMI), -0.5 kg/m2 (95% CI -0.7 to -0.3). There was a general shift to lower z score categories for height, weight, and BMI from baseline to LOTA. The mean change in ADHD-RS-IV from baseline to LOTA was -25.8 (95% CI -27.0 to -24.5) for total score, -12.6 (95% CI -13.4 to -11.9) for the hyperactivity/impulsivity subscale score, and -13.1 (95% CI -13.8 to -12.4) for the inattention subscale score. At LOTA, 77.9% of participants had a CGI-I score of 1 or 2. In addition, 77.3 and 69.2% of participants were classified as treatment responders, based on a CGI-I score of 1 or 2 and a ≥30% or ≥50% reduction from baseline in ADHD-RS-IV total score, respectively. Conclusions: The safety profile of LDX in this longer-term study was similar to that reported in previous studies. The efficacy of LDX was maintained throughout the 2-year study period. | ||
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