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- Methylphenidat (1) (entfernen)
Attention-deficit/hyperactivity disorder (ADHD) is the most frequent psychiatric disorder in children and adolescents and is often treated with methylphenidate (MPH), resulting in MPH exposure in more than 1% of all children in many countries. A 2005 report on cytogenetic effects in peripheral lymphocytes from 12 ADHD children treated for 3 months with MPH raised questions about its genetic toxicity and potential carcinogenicity. A healthy control group (23 individuals), a chronically MPH-treated (>12 months) group (21 patients), and a drug naïve group of ADHD-affected children (26 patients), which was analyzed again after 3 months (17 patients) and 6 months (11 patients), provided samples for analysis of micronucleated lymphocytes. No significant alteration in genomic damage as seen as micronucleus frequency in peripheral lypmphocytes was detected after MPH treatment. No indication for genomic damage induced by MPH was obtained in this study. Ongoing studies in the USA, as well as continuation of recently published epidemiological cancer incidence analysis should provide additional reassurance for MPH-treated ADHD patients.