"Our pharmacoepidemiological study involving incident MPH users and a large number of characteristics shows different patterns of MPH use among children and adults. The results among 25-49 years suggest that MPH may be used for medical conditions other than Attention Deficit Hyperactivity Disorder or narcolepsy in adults and that it might be subject to misuse and/or abuse."
V. Pauly, E. Frauger, M. Lepelley, M. Mallaret, Q. Boucherie, J. Micallef
BJCP, british journal of clinical pharmacology, mars 2018