Stimulant medication in pre-school children in New South Wales

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The aims of this study were: (i) to examine the annual treatment rate of children under 4 years from 1997 to 2006; (ii) to compare their treatment rate and attrition with that of children starting treatment at the modal age; (iii) to describe the clinical characteristics of children aged less than 4 years and their response to stimulant medication for the treatment of attention-deficit hyperactivity disorder.


Retrospective study of electronic prescription and authority records of the New South Wales Department of Health and a review of clinical reports.


The annual treatment initiation rate for children under 4 years showed a progressive decline over the decade. In 2001, 13.6% of the children starting treatment were aged 7 years (modal age); those aged <4 years represented 1.1% of the total. There was no significant difference in attrition rate between these two groups. For those aged <4 years with clinical reports available (n= 235), oppositional behaviour and developmental problems were reported frequently (78 and 43%, respectively). Non-pharmacological interventions were implemented in 77% and non-stimulant medications were prescribed in 50%. For 76% of children, an improvement in behaviour was reported after stimulant therapy.


Children treated with stimulant medication aged <4 years were a small subgroup with a high rate of co-morbidity. The majority were perceived to have a favourable response to stimulant medication. However, there was a disturbingly high rate of prescribing of other psychotropic medications of known toxicity and unproven efficacy.

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