[Acute psychiatric symptoms during methylphenidate intravenous injections: A case report].

We report the case of a 32-year-old man who developed acute psychiatric disorders after repeated intravenous injections of methylphenidate. The behavioural disorders with extreme psychomotor restlessness and delirious syndrome have resolved within 24hours. The available data highlight the fact that the prescriptions of methylphenidate, an amphetamine-like substance, are constantly increasing in Europe and Northern America. The potential of abuse and addiction to this drug, which is growingly misused, is now clearly established. The medical professionals should be cautious and attentive to the risk of misuse of this drug.