PMID- 26293742 OWN - NLM STAT- MEDLINE DCOM- 20160815 LR - 20181113 IS - 1179-1934 (Electronic) IS - 1172-7047 (Linking) VI - 29 IP - 10 DP - 2015 TI - Safety of Methylphenidate and Atomoxetine in Children with Attention-Deficit/Hyperactivity Disorder (ADHD): Data from the Italian National ADHD Registry. PG - 865-77 LID - 10.1007/s40263-015-0266-7 [doi] AB - OBJECTIVE: The aim of this study was to assess the type and frequency of adverse events (AEs) in children with attention-deficit/hyperactivity disorder (ADHD) treated with methylphenidate or atomoxetine over a 5-year period in a large naturalistic study. METHODS: We draw on data from the Italian ADHD Registry, a national database for postmarketing phase IV pharmacovigilance of ADHD medications across 90 centers. AEs were defined as severe or mild as per the classification of the Italian Medicines Agency. AE frequency in the two treatment groups was compared using incidence rates per 100 person-years (IR100PY) and incidence rate ratios (IRRs). Mantel-Haenszel adjusted IRRs were calculated to control for psychiatric comorbidity. RESULTS: A total of 1350 and 753 participants (aged 6-18 years, mean age 10.7 +/- 2.8) were treated with methylphenidate and atomoxetine, respectively, from 2007 to 2012. Ninety participants (7 %) were switched from methylphenidate to atomoxetine, and 138 (18 %) from atomoxetine to methylphenidate. Thirty-seven children treated with atomoxetine and 12 with methylphenidate had their medication withdrawn. Overall, 645 patients (26.8 %) experienced at least one mild AE (including decreased appetite and irritability, for both drugs) and 95 patients (3.9 %) experienced at least one severe AE (including severe gastrointestinal events). IR100PY were significantly higher in the atomoxetine-treated group compared with the methylphenidate-treated group for a number of mild and severe AEs and for any severe or mild AEs. After controlling for comorbidities, IRR was still significantly higher in the atomoxetine group compared with the methylphenidate group for a number of mild (decreased appetite, weight loss, abdominal pain, dyspepsia, stomach ache, irritability, mood disorder and dizziness) and severe (gastrointestinal, neuropsychiatric, and cardiovascular) AEs. CONCLUSIONS: In this naturalistic study, methylphenidate had a better safety profile than atomoxetine. FAU - Cortese, Samuele AU - Cortese S AD - Developmental Brain-Behaviour Laboratory, Department of Psychology, University of Southampton, Highfield Campus, Southampton, UK. samuele.cortese@gmail.com. AD - New York University Child Study Center, New York, NY, USA. samuele.cortese@gmail.com. FAU - Panei, Pietro AU - Panei P AD - Department of Therapeutic Research and Medicines Evaluation, Istituto Superiore di Sanita, Italian National Institute of Health, Viale Regina Elena, 299, 00161, Rome, Italy. pietro.panei@iss.it. FAU - Arcieri, Romano AU - Arcieri R AD - Department of Therapeutic Research and Medicines Evaluation, Istituto Superiore di Sanita, Italian National Institute of Health, Viale Regina Elena, 299, 00161, Rome, Italy. FAU - Germinario, Elena A P AU - Germinario EA AD - Department of Therapeutic Research and Medicines Evaluation, Istituto Superiore di Sanita, Italian National Institute of Health, Viale Regina Elena, 299, 00161, Rome, Italy. FAU - Capuano, Annalisa AU - Capuano A AD - Department of Experimental Medicine, Regional Center of Pharmacosurveillance and Pharmacoepidemiology, Second University of Naples, Naples, Italy. FAU - Margari, Lucia AU - Margari L AD - Child Neuropsychiatry Unit, Department of Neuroscience and Sense Organs, Hospital Polyclinic of Bari, University Aldo Moro, Bari, Italy. FAU - Chiarotti, Flavia AU - Chiarotti F AD - Department of Cell Biology and Neurosciences, Istituto Superiore di Sanita, Italian National Institute of Health, Rome, Italy. FAU - Curatolo, Paolo AU - Curatolo P AD - Systems Medicine Department, Child Neurology and Psychiatry Unit, Tor Vergata University Hospital of Rome, Rome, Italy. LA - eng PT - Clinical Trial, Phase IV PT - Comparative Study PT - Journal Article PT - Multicenter Study PT - Observational Study PL - New Zealand TA - CNS Drugs JT - CNS drugs JID - 9431220 RN - 0 (Adrenergic Uptake Inhibitors) RN - 0 (Central Nervous System Stimulants) RN - 0 (Psychotropic Drugs) RN - 207ZZ9QZ49 (Methylphenidate) RN - 57WVB6I2W0 (Atomoxetine Hydrochloride) SB - IM MH - Adolescent MH - Adrenergic Uptake Inhibitors/adverse effects/therapeutic use MH - Atomoxetine Hydrochloride/*adverse effects/therapeutic use MH - Attention Deficit Disorder with Hyperactivity/diagnosis/*drug therapy/epidemiology MH - Central Nervous System Stimulants/adverse effects/therapeutic use MH - Child MH - Comorbidity MH - Female MH - Humans MH - Incidence MH - Italy/epidemiology MH - Male MH - Methylphenidate/*adverse effects/therapeutic use MH - Psychiatric Status Rating Scales MH - Psychotropic Drugs/*adverse effects/therapeutic use MH - Registries MH - Severity of Illness Index EDAT- 2015/08/22 06:00 MHDA- 2016/08/16 06:00 CRDT- 2015/08/22 06:00 PHST- 2015/08/22 06:00 [entrez] PHST- 2015/08/22 06:00 [pubmed] PHST- 2016/08/16 06:00 [medline] AID - 10.1007/s40263-015-0266-7 [pii] AID - 10.1007/s40263-015-0266-7 [doi] PST - ppublish SO - CNS Drugs. 2015;29(10):865-77. doi: 10.1007/s40263-015-0266-7.