In August 2006 Cephalon unexpectedly received a 'non-approvable' letter from the FDA for modafinil tablets branded as Sparlon. Taken in this guise, modafinil was intended for the treatment of so-called attention-deficit/hyperactivity disorder (ADHD) in children and adolescents. The FDA's rejection of modafinil/Sparlon for ADHD was based on a single adverse incident during clinical trials. One child developed a rash suggestive of Stevens-Johnson syndrome - a serious hypersensitivity complex affecting the skin and mucous membranes. There is no evidence that Stevens-Johnson syndrome is more common in adult modafinil users. The physician who diagnosed SJS in the affected 10 year old later recanted the diagnosis.
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