To assess wether methylphenidate reduces the prevalence of primary nocturnal enuresis in children with attention deficit disorder

Children aged 5 - 10 years newly diagnosed with attention deficit hyperactivity disorder who report primary nocturnal enuresis, Investigators will obtain baseline data (from parents/caregivers) on their sleep habits and enuresis characteristics by questionnaire. After 6 weeks of methylphenidate therapy, prescribed for the attention deficit, a new questionnaire will be filled.

Inclusion Criteria:

• New diagnosis of attention deficit hyperactivity disorder
• History of primary nocturnal enuresis
• Normal neurological examination

Exclusion Criteria:

• Anatomical abnormality of the genitourinary system
• Concommitant treatment, pharmacological/behavioral for enuresis
• Concommitant diurnal enuresis

Children aged 5 - 10 years receiving a new diagnosis of attention deficit hyperactivity disorder