Excessive Talking Triggered by Methylphenidate in a Boy with ADHD

There has previously been no report of provocation of excessive talking as an adverse effect of methylphenidate (MPH) in children with ADHD. This is a report of excessive talking after taking methylphenidate in a child with ADHD, diagnosed according to DSM-IV diagnostic criteria using the bFarsi version of KSADS. His mother and nursery teacher reported a significant increase of talking about 45 min after taking medication. They scored hypertalking as 7–9 on a 1–10 visual analogue scale. There were no symptoms of affective or anxiety disorder. Re-challenge was conducted many times and hypertalking reoccurred after every time he took the medication. It is possible that MPH increases verbal output in some ADHD children.

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