Clinically important drug–drug interactions in poly‐treated elderly outpatients: a campaign to improve appropriateness in general practice

Aims The aim was to assess the impact of a campaign for general practitioners (GPs) to reduce clinically‐important drug–drug interactions (DDIs) in poly‐treated elderly patients. Methods We compiled a list of 53 DDIs and analyzed reimbursed prescriptions dispensed to poly‐treated (≥four drugs) elderly (>65 years) patients in the Emilia Romagna region during January 2011–June 2011 (first pre‐intervention period), January 2012–June 2012 (second pre‐intervention period) and January 2013–June 2013 (post‐intervention period). Educational initiatives to GPs were completed in July 2012–December 2012. Pre‐test/post‐test analysis (2013 vs. 2012) was performed, also using predicted 2013 data (P