Conclusions: When hospital clinical staff seek medication advice from other members of a ward it tends to be sought from those in their profession. However key individuals in the ward are relied upon for the provision of medication advice by staff from all professions. Social network analysis can be used to examine the complex medication advice-seeking interactions amongst staff in a hospital ward, providing useful quantitative baseline data against which to compare the effect of interventions, such as an electronic medication system, on interactions. (Source: International Journal of Medical Informatics).