Method We reviewed all prescriptions of FQ for children up to 17 years of age who were hospitalized at Universitair Ziekenhuis Brussel, a Belgian university children's hospital, in the period 2010–2013. Patient characteristics, indication for the FQ prescription and microbial cultures were obtained from the medical file. The study was approved by the institutional review board.

Results As we foresee to finish our data analysis by the end of April 2015, we present results of our interim analysis here. Until now, a total of 178 FQ prescriptions in 79 children were analyzed. The majority of children had major comorbidities such as childhood cancer, cystic fibrosis or inflammatory bowel disease. FQ prescription was based on a microbial culture in 15.4% of cases. Frequent indications for FQ prescription were Pseudomonas eradication in cystic fibrosis patients, long term antibiotic prophylaxis in neutropenic patients and wound infections. Prescribed daily doses and consumed daily doses varied widely, even for the same indication. Concomitant medications were common and included mainly other antibiotics, steroids and chemotherapeutics.

Conclusion FQ were used as ‘reserve antibiotic,' and so on-label, in a minority of all FQ prescriptions for hospitalized children.