Paediatric medicine faces a troubling challenge. For good ethical reasons, scientists have long been reluctant to experiment on children. As a result, many of the oldest and most common medications used in pediatric medicine have not been tested on the youngest patients. This means there is very little good quality research on efficacy or proper dosage. This concerns Dr Dan Hawcutt. He’s a Senior Lecturer Paediatric Clinical Pharmacology at the University of Liverpool who wants to further what we know about the medicines we give to children.