A Clinical Audit and Impact of Interventions on Antibiotic Prescribing Practices at a Public Dental Primary Care Clinic

Inappropriate antibiotic prescribing in dentistry has been widely reported but local studies are scarce. We aimed to evaluate antibiotic prescribing practices among dental officers in a public dental primary care clinic against current guidelines: specifically assessing the number, appropriateness, accuracy of prescriptions, type of antibiotics prescribed and repeated prescribing of the same type of antibiotics within a specific duration. A retrospective audit consisting of two cycles (1st cycle: July to September 2018, 2nd cycle: July to September 2019) was carried out by manually collecting relevant data of patients (aged 18 and above) who were prescribed antibiotics from carbon copies of prescription books. Between each cycle, various interventions such as education through a continuous professional development (CPD) session, presentation of preliminary findings and making guidelines more accessible to dental officers were implemented. When the 1st and 2nd cycles were compared, the number of antibiotic prescriptions issued reduced from 194 to 136 (-30.0%) whereas the percentage of appropriate prescriptions increased slightly by 4.1%. Inaccurate prescriptions in terms of dosage and duration decreased (-0.5% and -13.7%, respectively) whilst drug form and frequency of intake increased (+15.7% and +0.7%, respectively). Repeated prescribing of the same antibiotics by the same officer within a period of =6 weeks no longer occurred. Amoxicillin and metronidazole were most commonly prescribed in both cycles. Overall, the antibiotic prescribing practices did not closely adhere to current guidelines. However, clinical audit in conjunction with targeted interventions resulted in improvement in the antibiotic prescribing patterns. Thus, further intervention and re-audit is necessary.