RESUMO
OBJECTIVES: Few studies have explored the factors influencing user uptake of interventions designed to enhance therapeutic drug monitoring (TDM). This study aimed to identify barriers and facilitators to acceptance of a pilot intervention, the TDM Advisory Service (the Service), that provided prescribing advice for the antibiotic, vancomycin at an Australian public hospital. METHODS: A sample of prescribers and pharmacists who had interacted with the Service (n = 10), and a sample who had not (n = 13), participated in semi-structured interviews. Interviews were transcribed verbatim and analysed independently by two researchers for emerging themes. The Theoretical Domains Framework (TDF) was used to synthesise barriers and facilitators to Service acceptance. RESULTS: Key barriers reported by participants who had interacted with the Service aligned with two TDF domains: 'Social Influences' (prescribing hierarchy) and 'Environmental Context and Resources' (accessibility of dose advice). For participants who had not interacted with the Service, key barriers aligned with two TDF domains: 'Knowledge' (uncertainty of Service processes) and 'Environmental Context and Resources' (accessibility of dose advice). Key facilitators for both participant groups aligned with 'Beliefs about Consequences' (improved prescribing and patient outcomes) and 'Environmental Context and Resources' (accessibility of dose advice). A novel domain, 'Trust', was identified. CONCLUSIONS: Independent of participant interaction with the Service, knowledge of Service processes, perceived beneficial outcomes, improved accessibility, and trust in Service capabilities were key determinants of acceptance. This evidence can be used to inform the adoption of strategies to adapt and enhance integration of the Service into clinical workflow.