New findings on side-effects of drugs used to treat ADHD are prompting concern among medical experts.
One of Australia's leading child psychiatrists says more research is needed on the effects of the drugs being prescribed to children with behavioural problems.
Dr Jon Jureidini, head of psychiatry at Adelaide's Women's and Children's Hospital, says he is worried by new figures showing an increase in psychotic episodes among children taking the medications.
Dr Jureidini says it is questionable whether prescription drugs do much good for conditions such as Attention Deficit Hyperactivity Disorder (ADHD) and little research has been done on their possible side-effects.
"Children's behaviour problems are generally a reaction to something that's happening inside them or outside them and I can almost always find a better explanation for what's going on than calling it ADHD, so the idea of whether to use drugs rarely arises," he said.
"We doctors need to be much more cautious about prescribing them, we also need to be much more careful in our assessment of children with behavioural problems."