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    Jonathan Dartnell

    This is a protocol for a Cochrane Review (Intervention). The objectives are as follows:Principle research objectiveTo determine the effectiveness of organisational and professional interventions on the uptake of research evidence in... more
    This is a protocol for a Cochrane Review (Intervention). The objectives are as follows:Principle research objectiveTo determine the effectiveness of organisational and professional interventions on the uptake of research evidence in Emergency Practice Settings.Secondary research objectiveTo determine which factors might modify the uptake of research evidence in Emergency Practice Settings.We will explore the following possible effect modifiers across studies:Content: interventions that target a specific topic or behavior in emergency medicine.Type of ED: rural or urban; pediatric, adult or mixed; private or public; primary or tertiary; public or private.Health professional targeted (single or interdisciplinary).Type of intervention.Cost of intervention.To address the objectives the following comparisons will be explored:Effectiveness of single organisational interventions compared with no intervention.Effectiveness of multiple organisational interventions compared with no intervention.Effectiveness of multiple organisational interventions compared with single interventions.Effectiveness of clinical practice guidelines compared with no intervention.Effectiveness of organisational interventions and clinical practice guidelines compared with no intervention.Effectiveness of clinical practice guidelines with other professional interventions compared with clinical practice guidelines and no intervention.
    The availability of direct‐acting antivirals (DAAs) sparked efforts to eliminate hepatitis C virus (HCV) in Australia. We evaluated whether an educational intervention of a 1‐h discussion among staff using audit and feedback data from the... more
    The availability of direct‐acting antivirals (DAAs) sparked efforts to eliminate hepatitis C virus (HCV) in Australia. We evaluated whether an educational intervention of a 1‐h discussion among staff using audit and feedback data from the MedicineInsight GP programme would improve DAA uptake. Of 296 eligible general practices in MedicineInsight, 11% opted out. Randomization stratified by practice caseload allocated 130 practices to the intervention arm and 129 to control. The primary outcome was the number of patients started on DAAs over 6 months using the negative binomial regression model adjusted for DAA prescription history and clustering by practice. Data for analysis were available for 78% of practices, which included 101 practices and 2469 DAA‐naive patients with confirmed/possible HCV in the intervention arm, and 100 practices and 2466 patients in the control arm. At baseline, 49.5% of practices had prescribed ≥1 DAA in the past year; 18.9% of HCV patients had already been treated with DAAs; the mean age of DAA‐naive HCV patients was 43 years old, and 57% were men. Over 6 months, 43 patients in the intervention arm and 36 in the control arm started DAAs (adjusted IRR 1.19; 95% CI 0.67–2.11, p = 0.55). In the first 3 months, 27 vs 16 patients started DAAs (adjusted IRR 1.77, 0.88–3.58; p = 0.111). Few patients were started on DAAs, and a facilitated discussion in HCV management did not lead to a significant increase. Alternative measures, such as incentivizing GP initiations or patients, are suggested to address remaining barriers to DAA uptake in Australian primary care.
    This chapter describes a historical program to improve management of patients at risk of stroke. While guidelines for management of stroke have changed since the time of this program, the value of this piece of work lies in the detail... more
    This chapter describes a historical program to improve management of patients at risk of stroke. While guidelines for management of stroke have changed since the time of this program, the value of this piece of work lies in the detail provided on the methods and utilisation of formative research, program design and program evaluation. Of particular note, is the evaluation of the impact of the program on health outcomes at a population level, which is the ultimate goal of many programs and yet one that we cannot always measure. Stroke is a common health event, and it causes significant morbidity and mortality. Preventative management in high-risk individuals is known to reduce the likelihood of stroke, and yet primary care doctors only implement guidelines in about 60% of patients. This chapter describes a large multifaceted intervention to improve prescribing in patients at risk of stroke. It outlines the rationale for topic selection, the use of formative research to design key mes...
    Research Interests:
    To determine patterns of prescribing of glycopeptide antibiotics (vancomycin and teicoplanin) in Victorian hospitals and identify areas for targeted intervention. A concurrent, observational, multisite evaluation of drug use. Thirty-five... more
    To determine patterns of prescribing of glycopeptide antibiotics (vancomycin and teicoplanin) in Victorian hospitals and identify areas for targeted intervention. A concurrent, observational, multisite evaluation of drug use. Thirty-five Victorian hospitals, 1-14 September 1997. Patients commencing a glycopeptide antibiotic course. Rate of glycopeptide antibiotic use; indications; duration of use; main hospitals using glycopeptide antibiotics. 293 patients (269 adults and 24 neonates) commenced on 302 glycopeptide antibiotic courses: 296 intravenous (i.v.) vancomycin courses and three each of oral vancomycin and parenteral teicoplanin. The overall rate of use was 10.3 courses per 1000 inpatient separations. Of 271 i.v. vancomycin courses for adults, 176 (65%) were for treatment--120 empirically. The median duration of treatment courses was 4.7 days (interquartile range, 2.0-8.2 days). A flucloxacillin-resistant organism was confirmed for 44% of treatment courses. Ninety-five i.v. vancomycin courses were for prophylaxis, including for cardiac (54%) and vascular surgery (21%); 82% of prophylactic courses were administered for less than 24 hours. Of all the glycopeptide antibiotic courses, 69% were administered at five major metropolitan hospitals. Glycopeptide antibiotic use in Victoria is concentrated in the major metropolitan hospitals. Prolonged durations of vancomycin therapy, including for surgical prophylaxis and empirical therapy not subsequently confirmed by microbiology findings, would be suitable targets for interventional strategies.
    To determine the incidence of hospital admissions for adverse events related to drug therapy, and to assess whether these drug-related admissions (DRAs) could have been reasonably prevented. A tertiary teaching hospital. Prospective... more
    To determine the incidence of hospital admissions for adverse events related to drug therapy, and to assess whether these drug-related admissions (DRAs) could have been reasonably prevented. A tertiary teaching hospital. Prospective assessment of all admissions through the emergency department and resulting in a stay of more than 24 hours during 30 consecutive days in November and December 1994 to determine if the admission was related to drug therapy. Cases of intentional overdose were excluded. The number, type, causality and avoidability of drug-related admissions. Of 965 admissions, 55 (5.7%) were assessed as being drug-related. Drug-related admissions (DRAs) were designated possibly (38%), probably (46%) or definitely (16%) drug-related; caused by prescribing factors (26%), patient noncompliance (27%) and adverse drug reactions (47%); and classified as definitely (5.5%), possibly (60.0%) and not (34.5%) avoidable. The estimated annual cost to the hospital for all DRAs was $3,496,956 and for unavoidable DRAs was $1,629,494. The DRA rate we found lies around the middle of the range of other published rates. Few DRAs were judged definitely avoidable and over one-third were unavoidable. Nevertheless, the largest proportion were judged possibly avoidable. As the drugs identified in this study are clearly needed in the community, efforts to reduce DRAs must concentrate on education, counselling and monitoring of drug therapy.
    1. Med J Aust. 1999 Nov 15;171(10):541-3. Electronic prescribing and computer-assisted decision support systems. Nolan AM, Norquay CA, Dartnell JG, Harvey KJ. University of Newcastle, NSW. PMID: 10816706 [PubMed - indexed for MEDLINE].... more
    1. Med J Aust. 1999 Nov 15;171(10):541-3. Electronic prescribing and computer-assisted decision support systems. Nolan AM, Norquay CA, Dartnell JG, Harvey KJ. University of Newcastle, NSW. PMID: 10816706 [PubMed - indexed for MEDLINE]. Publication Types: ...
    Objectives In Brazil, specialty medicines for rheumatoid arthritis (RA) treatment are provided by the national health system (NHS) according to mandatory protocols. Knowing the rules for prescription of these biological agents is crucial... more
    Objectives In Brazil, specialty medicines for rheumatoid arthritis (RA) treatment are provided by the national health system (NHS) according to mandatory protocols. Knowing the rules for prescription of these biological agents is crucial to ensuring patient access to treatment. This study aims to evaluate the feasibility of an academic detailing strategy to promote the quality use of the medicines available in NHS among prescribers. Methods Forty-three specialists and general practitioners were visited by researchers to perform an academic detailing of the Clinical Protocols and Therapeutic Guidelines (PCDT) for RA adopted by NHS. After the visits, a survey was performed with prescribers to measure their perception in terms of satisfaction and information reliability with the academic visits. At the end, we perform a cost analysis to permit comparisons of this strategy with other educational activities. Key findings From 43 physicians that were visited, 28 responded to the telephone...
    IntroductionThe MedicineWise app is a free consumer health and medicine management app developed by NPS MedicineWise. With 107,000+ downloads and 78,000+ active sessions per month, the MedicineWise app's core functions include:... more
    IntroductionThe MedicineWise app is a free consumer health and medicine management app developed by NPS MedicineWise. With 107,000+ downloads and 78,000+ active sessions per month, the MedicineWise app's core functions include: keeping track current medicines lists, medicine dose reminders and recording health conditions, allergies, test results and other health information. Recent enhancements also enabled the app to deliver featured health- and medicine-related content to users based on their medicines and/or health conditions. The goal is to maximise the MedicineWise app's capabilities by personalizing to users’ needs and combining with health professional interventions when needed, to encourage better delivery of health and medicines information and improve medication adherence and health outcomes.MethodsA number of personalized medicines management service offerings were created by combining a technology solution using the MedicineWise app (including the app's core ...
    IntroductionAustralia has had high rates of antibiotic use in primary care. Consumer and health professional knowledge and practices in the community vary. In 2012, NPS MedicineWise implemented a five-year national educational program for... more
    IntroductionAustralia has had high rates of antibiotic use in primary care. Consumer and health professional knowledge and practices in the community vary. In 2012, NPS MedicineWise implemented a five-year national educational program for consumers, general practitioners (GPs) and pharmacies to reduce antibiotic use in Australia.MethodsFor consumers, a social marketing approach was used focusing on the winter months. Strategies leveraged collectivism, nudge theory, celebrity endorsement and co-creation and used multiple communication channels. For health professionals, interventions were most intense in 2012 with additional activities implemented each year including face-to-face educational visiting, audits, comparative prescribing feedback, case studies and point-of-care materials. Surveys were conducted periodically to evaluate changes in knowledge and awareness. Pharmaceutical Benefits Scheme (PBS) claims data were analyzed. Organization for Economic Co-operation and Development ...
    IntroductionOptimal rheumatoid arthritis (RA) management requires coordinated management and consistent communication by health practitioners with patients. Suboptimal methotrexate use is a factor leading to increased use of biological... more
    IntroductionOptimal rheumatoid arthritis (RA) management requires coordinated management and consistent communication by health practitioners with patients. Suboptimal methotrexate use is a factor leading to increased use of biological disease modifying antirheumatic drugs (bDMARDs), which account for significant government drug expenditure. A multidisciplinary co-design approach was used to develop and implement a program aiming to improve early management and quality use of medicines (QUM) for people with RA in Australia.MethodsLiterature review and key informant interviews identified broad potential QUM issues in RA management. An initial exploratory multidisciplinary meeting prioritized QUM issues, identified audiences and perspectives, and scoped focus areas to address with education. Iteratively through co-design meetings and activities, program objectives were agreed, barriers and enablers for change explored, characteristics of intervention activities considered and rated, a...
    Introduction:Many countries have a national antimicrobial resistance strategy. In Australia, primary care is especially important because this setting encompasses a high proportion of antibiotic use. While antibiotic use decreased during... more
    Introduction:Many countries have a national antimicrobial resistance strategy. In Australia, primary care is especially important because this setting encompasses a high proportion of antibiotic use. While antibiotic use decreased during the 1990s, it began to increase again in the mid-2000s. In response to this, in 2009 NPS MedicineWise implemented a series of nationwide educational interventions for consumers, family physicians (general practitioners), and community pharmacies that aimed to reduce excessive antibiotic use.Methods:For consumers a social marketing approach was used, including strategies that leveraged collectivism, nudge theory, celebrity endorsement, and co-creation. Channels included social, print, radio, and other media as well as practice waiting rooms and pharmacies. For health professionals, interventions included face-to-face education, audits, comparative prescribing feedback, case studies, and point-of-care materials. Surveys of consumers and family physici...
    Introduction:While medicines and medical tests are developed in a controlled clinical trial environment, postmarketing surveillance in the real world can be challenging. MedicineInsight—a database of longitudinal patient-level clinical... more
    Introduction:While medicines and medical tests are developed in a controlled clinical trial environment, postmarketing surveillance in the real world can be challenging. MedicineInsight—a database of longitudinal patient-level clinical information from primary care practices in Australia—is a novel program that collects primary care data to improve postmarketing surveillance at a national level.Methods:MedicineInsight collects de-identified clinical information from primary care practice information systems using data extraction tools. MedicineInsight currently includes 3.6 million regular patients of 3,300 family physicians (general practitioners) from 650 primary care practices across Australia. MedicineInsight data include longitudinal clinical information on diagnosis and medicines (dose, strength, route of administration, medication switches over time, adverse events, and allergies), and pathology testing data. A series of observational studies was developed for postmarketing s...
    In Australia, the antibiotic resistance crisis may be partly alleviated by reducing antibiotic use in general practice, which has relatively high prescribing rates - antibiotics are mostly prescribed for acute respiratory infections, for... more
    In Australia, the antibiotic resistance crisis may be partly alleviated by reducing antibiotic use in general practice, which has relatively high prescribing rates - antibiotics are mostly prescribed for acute respiratory infections, for which they provide only minor benefits. Current surveillance is inadequate for monitoring community antibiotic resistance rates, prescribing rates by indication, and serious complications of acute respiratory infections (which antibiotic use earlier in the infection may have averted), making target setting difficult. Categories of interventions that may support general practitioners to reduce prescribing antibiotics are: regulatory (eg, changing the default to "no repeats" in electronic prescribing, changing the packaging of antibiotics to facilitate tailored amounts of antibiotics for the right indication and restricting access to prescribing selected antibiotics to conserve them), externally administered (eg, academic detailing and audit...
    Would you prescribe a drug without regulatory approval, for which the safety and efficacy are unknown? Unlikely. Would you use a clinical practice guideline that is not endorsed by a peak body, with no accessible evidence for its... more
    Would you prescribe a drug without regulatory approval, for which the safety and efficacy are unknown? Unlikely. Would you use a clinical practice guideline that is not endorsed by a peak body, with no accessible evidence for its recommendations and with its authorship unknown? Unlikely. Do you currently use decision support tools in your prescribing software that have not been evaluated or accredited, with unknown or variable quality and reliability? Very likely.
    To determine the incidence of hospital admissions for adverse events related to drug therapy, and to assess whether these drug-related admissions (DRAs) could have been reasonably prevented. A tertiary teaching hospital. Prospective... more
    To determine the incidence of hospital admissions for adverse events related to drug therapy, and to assess whether these drug-related admissions (DRAs) could have been reasonably prevented. A tertiary teaching hospital. Prospective assessment of all admissions through the emergency department and resulting in a stay of more than 24 hours during 30 consecutive days in November and December 1994 to determine if the admission was related to drug therapy. Cases of intentional overdose were excluded. The number, type, causality and avoidability of drug-related admissions. Of 965 admissions, 55 (5.7%) were assessed as being drug-related. Drug-related admissions (DRAs) were designated possibly (38%), probably (46%) or definitely (16%) drug-related; caused by prescribing factors (26%), patient noncompliance (27%) and adverse drug reactions (47%); and classified as definitely (5.5%), possibly (60.0%) and not (34.5%) avoidable. The estimated annual cost to the hospital for all DRAs was $3,49...
    Acinetobacter baumannii is one of the main gram-negative bacilli in clinical practice. Nosocomial infections caused by multi-drug resistance Acinetobacter baumannii is very difficult to treat. This study was designed to investigate the... more
    Acinetobacter baumannii is one of the main gram-negative bacilli in clinical practice. Nosocomial infections caused by multi-drug resistance Acinetobacter baumannii is very difficult to treat. This study was designed to investigate the antimicrobial resistance characteristics and four resistant gene expressions of aminoglycoside-modifying enzymes including N-acetyltransferases and O-phosphotransferases in Acinetobacter baumannii. Bacterial identification and antimicrobial susceptibility test were performed by Phoenix system in 247 strains of Acinetobacter baumannii. Minimal inhibitory concentrations (MICs) of seven aminoglycosides including gentamicin, amikacin, kanamycin, tobramycin, netilmicin, neomycin and streptomycin in 15 strains of multi-drug resistant Acinetobacter baumannii were detected by agar dilution. Four aminoglycoside-modifying enzyme genes were amplified by polymerase chain reaction (PCR) and verified by DNA sequencer. The resistance rates of 247 strains of Acinetob...
    In the late 1970s concern in Melbourne teaching hospitals over the increasing incidence of antibiotic-resistant microorganisms and inappropriate antibiotic prescribing, led to the establishment of a working party to produce guidelines on... more
    In the late 1970s concern in Melbourne teaching hospitals over the increasing incidence of antibiotic-resistant microorganisms and inappropriate antibiotic prescribing, led to the establishment of a working party to produce guidelines on appropriate antimicrobial therapy. Therapeutic Guidelines: Antibiotic is now produced, marketed and sold by Therapeutic Guidelines Limited, an independent, not-for-profit enterprise that distils best-practice prescribing guidelines for Australian health professionals. Therapeutic Guidelines now cover all major therapeutic areas. Mere distribution of the guidelines had little impact on prescribing habits. However, targeted education campaigns have helped to improve antibiotic prescribing. The Antibiotic title remains the flagship of Therapeutic Guidelines Limited with sales, surveys and endorsements over 11 editions attesting to its wide acceptance and use. Therapeutic Guidelines: Antibiotic is one of many initiatives that have contributed to improvi...
    To determine patterns of use of ceftriaxone and cefotaxime (CEFX) in Victorian hospitals and to identify areas for improvement. A concurrent, observational evaluation of CEFX use in patients commencing a course of these drugs between 8... more
    To determine patterns of use of ceftriaxone and cefotaxime (CEFX) in Victorian hospitals and to identify areas for improvement. A concurrent, observational evaluation of CEFX use in patients commencing a course of these drugs between 8 and 14 September, 1999, in 51 Victorian hospitals. Proportion of patients treated with CEFX; indications; duration of use; concordance with recommendations of national antibiotic guidelines (Therapeutic guidelines: antibiotic, 10th edition [AG10]). 671 patients were treated with CEFX. The overall rate of use was 43 patients per 1000 inpatient separations. Treatment of respiratory tract infection accounted for 352 patients (52%) and surgical prophylaxis for 99 patients (15%). Treatment of skin/soft tissue, urinary tract and gastrointestinal tract infections accounted for about 7% of patients each. The median duration of CEFX courses was 3.0 days. The overall rate of concordance with indications recommended in AG10 was 27%. The rate of concordance for e...
    1. Med J Aust. 1999 Nov 15;171(10):541-3. Electronic prescribing and computer-assisted decision support systems. Nolan AM, Norquay CA, Dartnell JG, Harvey KJ. University of Newcastle, NSW. PMID: 10816706 [PubMed - indexed for MEDLINE].... more
    1. Med J Aust. 1999 Nov 15;171(10):541-3. Electronic prescribing and computer-assisted decision support systems. Nolan AM, Norquay CA, Dartnell JG, Harvey KJ. University of Newcastle, NSW. PMID: 10816706 [PubMed - indexed for MEDLINE]. Publication Types: ...
    To determine patterns of prescribing of glycopeptide antibiotics (vancomycin and teicoplanin) in Victorian hospitals and identify areas for targeted intervention. A concurrent, observational, multisite evaluation of drug use. Thirty-five... more
    To determine patterns of prescribing of glycopeptide antibiotics (vancomycin and teicoplanin) in Victorian hospitals and identify areas for targeted intervention. A concurrent, observational, multisite evaluation of drug use. Thirty-five Victorian hospitals, 1-14 September 1997. Patients commencing a glycopeptide antibiotic course. Rate of glycopeptide antibiotic use; indications; duration of use; main hospitals using glycopeptide antibiotics. 293 patients (269 adults and 24 neonates) commenced on 302 glycopeptide antibiotic courses: 296 intravenous (i.v.) vancomycin courses and three each of oral vancomycin and parenteral teicoplanin. The overall rate of use was 10.3 courses per 1000 inpatient separations. Of 271 i.v. vancomycin courses for adults, 176 (65%) were for treatment--120 empirically. The median duration of treatment courses was 4.7 days (interquartile range, 2.0-8.2 days). A flucloxacillin-resistant organism was confirmed for 44% of treatment courses. Ninety-five i.v. va...
    To improve the initiation of anticoagulation in patients with thrombotic disorders. We carried out a preliminary audit in 1991, developed and implemented strategies to address identified problems, and followed up with another audit in... more
    To improve the initiation of anticoagulation in patients with thrombotic disorders. We carried out a preliminary audit in 1991, developed and implemented strategies to address identified problems, and followed up with another audit in 1993. Medical records of inpatients at The Royal Melbourne Hospital whose anticoagulation therapy was initiated with heparin (intravenous) in therapeutic doses and subsequently converted to warfarin were prospectively assessed over 19-day periods. Pocket-sized laminated prescriber guidelines for initiating anticoagulation were disseminated after publishing the results of the first audit, together with a single prominent display of two posters in series advocating the use of the guidelines. The audits identified 25 eligible patients in 1991 and 27 in 1993. The mean duration of intravenous heparin therapy was reduced from 150 hours in 1991 to 97 hours in 1993 (P < 0.002). The mean delay before initiating warfarin therapy after starting heparin therapy...
    This article reports on the assignment of ICD-10-AM and EAN codes to 2500 topics in Therapeutic Guidelines (TG). The analysis of the assignment of ICD-10-AM codes in this project has revealed that ICD-10-AM is not capable of describing... more
    This article reports on the assignment of ICD-10-AM and EAN codes to 2500 topics in Therapeutic Guidelines (TG). The analysis of the assignment of ICD-10-AM codes in this project has revealed that ICD-10-AM is not capable of describing the complete clinical information in the guidelines series. It is not likely that any existing single classification scheme will be capable of this and that a combination of schemes will be necessary. The TG data model was integrated with the prototype MCCA data model for drug products. This integration indicates that the representation of drugs, while not ideal, is an appropriate means of linking clinical drug reference information to drug product information.
    Would you prescribe a drug without regulatory approval, for which the safety and efficacy are unknown? Unlikely. Would you use a clinical practice guideline that is not endorsed by a peak body, with no accessible evidence for its... more
    Would you prescribe a drug without regulatory approval, for which the safety and efficacy are unknown? Unlikely. Would you use a clinical practice guideline that is not endorsed by a peak body, with no accessible evidence for its recommendations and with its authorship unknown? Unlikely. Do you currently use decision support tools in your prescribing software that have not been evaluated or accredited, with unknown or variable quality and reliability? Very likely.
    The aim of this study was to identify antibiotic prescription patterns for community-acquired pneumonia (CAP) in Vietnam. Medical records for CAP adult patients admitted to 10 hospitals across the country were randomly selected from... more
    The aim of this study was to identify antibiotic prescription patterns for community-acquired pneumonia (CAP) in Vietnam. Medical records for CAP adult patients admitted to 10 hospitals across the country were randomly selected from admission lists during the peak pneumonia season. CAP cases were identified from manual record reviews by clinical pharmacists. Data was collected using a standard data collection tool including patient clinical features on admission, comorbidities, microbiological culture results, and antibiotic regimens. Pneumonia severity was estimated using the CURB-65 score. A total of 649 medical records for adult patients (55.2% male and 52.3% urban residents, median age 68 years) met the selection criteria for CAP. Pneumonia severity was assessed as mild (64.1% of patients), moderate (23.0%), and severe (9.2%). Antibiotics were most frequently administered intravenously (93.4%) and as combination therapy (dual therapy 54.4%, monotherapy 42.5%, and triple therapy 3.1% of patients) regardless of CAP severity. Third-generation cephalosporins were used most frequently (29.3% as monotherapy and 40.4% as combination therapy). Third-generation cephalosporins were most commonly combined with penicillins and/or quinolones. This first nationwide study provides a baseline profile of antibiotic use in the treatment of CAP. Third-generation cephalosporins were widely used for initial empirical management of CAP, often in combination with quinolones, regardless of CAP severity. The study will assist in providing an evidence base to inform new national antibiotic guidelines for CAP management and will contribute locally relevant data for the national master plan addressing antibiotic resistance and the development of educational interventions to improve CAP management. Copyright © 2014 John Wiley…
    To achieve sustained improvement in use of cefotaxime and ceftriaxone (CEFX) in a major teaching hospital, as measured against national antibiotic guidelines. Pre- and post-intervention survey of CEFX use in the Royal Melbourne Hospital,... more
    To achieve sustained improvement in use of cefotaxime and ceftriaxone (CEFX) in a major teaching hospital, as measured against national antibiotic guidelines. Pre- and post-intervention survey of CEFX use in the Royal Melbourne Hospital, a tertiary hospital in Melbourne, Victoria. Web-based antimicrobial approval system linked to national antibiotic guidelines was developed by a multidisciplinary team and implemented in March 2001. Change in rate of CEFX use (defined daily doses [DDDs] per 1000 acute occupied bed days) over 8 months pre- and 15 months post-intervention; concordance of indication for CEFX with national antibiotic guidelines pre- and post-intervention. CEFX use decreased from a mean of 38.3 DDDs/1000 bed days pre-intervention to 15.9, 18.7 and 21.2 DDDs/1000 bed days at 1, 4 and 15 months post-intervention. Concordance with national antibiotic guidelines rose from 25% of courses pre-intervention to 51% within 5 months post-intervention (P < 0.002). Gentamicin use also increased, from a mean of 30.0 to 48.3 DDDs/1000 bed days (P = 0.0001). The web-based antimicrobial approval system achieved a sustained reduction in CEFX use over 15 months as well as increased prescribing concordance with antibiotic guidelines. It has potential for linking to electronic prescribing and for wider use for other drugs, as well as for research into the epidemiology of antibiotic use.