Medicines management: a sour taste.
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To curb the trend toward increasingly resistant microorganisms, we must at least ensure that antibiotics are used in accordance with the best available scientific evidence. Here we review the control and streamlining measures aimed at optimizing the use of antibiotics, placing an emphasis on their demonstrated effectiveness in the intensive care unit environment. Because of their wide variety, the measures have been organized along the process of choosing, dosing, delivering, and then adjusting the initial antibiotics according to the culture results. By clarifying the range of options available, this process-based conceptual framework assists in best adapting a creative mixture of control measures to a particular healthcare system. The framework also facilitates the overview of a proposed multidisciplinary antibiotic management program, thereby helping to secure the administrative and local provider support necessary for its implementation and continued improvement.
Drug formularies are pivotal tools for delineating and directing prescribing to the "drugs of choice." Full realization of their potential has been hampered by insufficient comparative data on drug efficacy/safety and local resources for formulary development. However, misconceptions concerning fundamental formulary concepts pose an even more formidable obstacle. This article identifies statements illustrating formulary misconception a) made by physicians attending Pharmacy and Therapeutics Committee meetings during a three-year period and b) appearing in published sources. The paper highlights basic objectives and operational requirements of an effective formulary, and contrasts this definition with 20 myths and misinformation culled from these two sources. Not only does such misinformation impair formulary development, many critics are so preoccupied with alleged shortcomings that progress in minimizing the real limitations of formularies has been impeded.
Effects on utilization and expenditures occurring concurrently with an expansion of coverage in the South Carolina Medicaid drug formulary were investigated. Data were collected for prescriptions, physician office visits, and outpatient and inpatient hospital visits. Data were evaluated for a cohort of 12,139 individuals who had at least one prescription claim and were continuously eligible for benefits during the two-year study. A repeated measures design was employed to control the differences between subjects. A multivariate analysis of variance was used to detect overall differences in utilization and expenditures. A priori comparisons of means were performed to detect changes in levels and rates of expenditures and utilization for each service. Increases were observed in the number of prescriptions, physician visits, and outpatient visits per person while the number of inpatient hospital admissions declined. Similarly, expenditures increased for all service areas except the inpatient hospital service. The proportion of variance explained by the formulary change was small in all service areas, but would be of practical significance because of the large number of Medicaid recipients affected. From a theoretical perspective, an association of a reduction in inpatient hospital use and expenditures following the elimination of drug formulary restrictions is particularly noteworthy. These findings support the thesis that medical care services should not be viewed in isolation but rather as a system of interrelated activities. Interventions in one portion of the system are mirrored by changes in utilization of other components. Frequently, private and public medical care programs are managed with organizationally distinct benefit budgets, which are controlled independently. In view of the results of this study, this organizational approach may lead to a suboptimal allocation of resources.
Many hospitals have introduced formularies to reduce hospital pharmacy expense, among other reasons. This study provides empirical evidence of the influence of hospital formulary restrictions on pharmacy charges, all other hospital charges, and on length of stay, using a survey of hospital drug policies and hospital discharge data from Washington State in 1989. Limiting the number of drugs in particular therapeutic categories reduced total charges incurred for gastrointestinal disease and asthma patients, increased total charges for cardiovascular disease patients, and had no effect on charges for infectious diseases patients. Restricting availability of drugs reduced pharmacy charges, but these savings tended to be offset by increases in other charges. Combining the categories, we found that restricting availability of drugs did not affect charges. We conclude that across-the-board restrictions do not result in cost savings, although savings may be realized for particular drug categories.
The contribution of drug utilisation studies on national, regional and local levels, to the quality control or audit of drug therapy is discussed. Two major types of audit, self-audit and peer-group audit, are outlined and examples presented illustrating how the concept of audit may be applied to therapeutics with special reference to drug information centres, feedback of drug prescribing data, and drug formularies. When drug information on prescribing practice from these sources is disseminated to the prescribers without value judgements being made, the component of self-audit is predominant in contrast to drug information dealing with prescribing appropriateness, in which peer-group opinion is expressed. Methods of capturing and disseminating data on prescribing practice which could be used in the auditing process are described. However, the greatest contribution to therapeutic audit lies with those responsible for medical training who should foster the quality of selfcriticism and the quest for high standards of prescribing practice in their students.
In recent years there has been a renewed interest in the use of local hospital 'formularies'. The development and preparation at The London Hospital (Whitechapel) of a guide of prescribing which embraces and extends the concept of a formulary is described. A method of involving staff in the preparation of text was developed to ensure the rapid production of a reasonably comprehensive guide which would command respect and a high degree of compliance. The use of word-processing techniques and graphic design expertise are described. The guide has been carefully introduced together with plans for monitoring compliance and its influence on drug expenditure. These are discussed in the light of one year's experience with the guide.
This paper describes the management of a hospital formulary that is operated by voluntary co-operation of prescribes. The organizational and philosophical factors associated with the formulary management system in a major teaching hospital environment are discussed. A combination of educative, re-educative, persuasive and facilitative strategies is used to influence prescribing behaviour. Both passive and active methods, including face-to-face intervention methods are practised. The formulary is reinforced with an extensive pharmacy monitoring operation which stimulates facilitative dialogue between pharmacists and prescribers and encourages medical self-audit and peer review. Evidence of compliance with recommended policies, and consequent control of drug expenditure are presented.
The stability of an oral formulation of 10 mg/ml caffeine citrate (equivalent to 5.03 mg/ml caffeine free base), which was preserved with potassium sorbate, was assessed at a range of temperatures. There was no appreciable change in pH or caffeine content over 1 year, even at storage temperatures of 32 degrees C and 45 degrees C. A batch-to-batch difference in the stability of potassium sorbate was detected, with losses over 1 year of 2% and 11% for two batches at 25 degrees C and 10% and 30%, respectively, at 45 degrees C. The formulation complied with the Antimicrobial Preservative Efficacy test of the British Pharmacopoeia throughout a period of storage at 25 degrees C for 1 year. There was no detectable benefit to preservative efficacy by adding 20% w/v sorbitol as an osmotic agent. The formula with no sorbitol may be preferable due to the potential for sorbitol to cause gastrointestinal upset. A shelf-life of 1 year at room temperature is feasible. The additional precaution of limiting the in-use storage life to 1 month after opening is recommended to ensure acceptable microbiological quality.
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A study was carried out analysing the operation of a drug rationalisation programme in a central London teaching district that had evolved from experience over 17 years. Creation of a limited list of about 700 drugs had been achieved by local consensus. Drug selection was based on appraisal of efficacy, safety, and cost and was undertaken by means of collaborative participation of most consultant specialists in the district. Educative and other non-restrictive strategies for reinforcing the rationalisation policy had achieved a consistently high rate of compliance in prescribing recommended drugs. The concept of selectivity in drug use and its continuous local reappraisal had a beneficial impact on the prescribing habits of doctors at all levels of seniority as well as on the training of medical undergraduates and nurses in the therapeutic use of medicines. Peer review and self audit were encouraged by use of an extensive monitoring system which incorporated continuous "facilitative" dialogue between ward pharmacists and prescribers. Two models of drug rationalisation programme were studied, the second of which together with other local initiatives had been associated with substantial and sustained reductions in drug spending each year over nine years since 1978. It is concluded that the second drug rationalisation programme model substantially improves the cost effective use of drugs in hospital and furthermore has the potential of being extended to general practice, especially in types of prescribing that are common to both forms of patient care.
The effects of introducing a hospital formulary alone and with active intervention were compared prospectively with regard to drug costs and the quality of prescribing. Intervention comprised feedback on prescribing habits, peer comparison, and information on drugs. Aspects of prescribing that were not subjected to intervention did not alter. In the year in which intervention occurred generic prescribing rose by 50%; inappropriate prescribing and overall use of third generation cephalosporins fell; and compliance with the recommended list of drugs was good. Overall, drug costs remained static, compared with a projected increase of 0.25 m pounds; in a comparative control hospital drug costs rose by 18%. During the next year, when no form of intervention took place, previous gains were eroded and drug costs rose. Continuous intervention, review, and feedback are required if a formulary is to continue to achieve its objectives.
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