A qualitative approach to the use of economic data in the selection of medicines for hospital formularies: a French survey

OBJECTIVE

Qualitative interviews were conducted with pharmacists in hospitals and clinics in the Rhône-Alpes region of France to determine the role of economic data when selecting medicines for formularies, to identify barriers to the use of this information and to study to what degree a healthcare establishment's financing system influences the use of this data.

METHOD

A stratified sample of healthcare establishments with over 100 short-stay beds were included: (1) thirteen public and semi-private hospitals financed through annual global budgets and (2) six private clinics financed on a fee-for-service basis. Interviews were carried out between October 1999 and January 2000, and coded independently by two researchers.

MAIN OUTCOME MEASURE

A multiple correspondence analysis was performed to compare the two groups of healthcare establishments.

RESULTS

The influence of economic data in the decision-making process is limited, for other factors appear to have greater weight: (1) efficacy and safety of medicines (2) relations between decision-makers and the pharmaceutical industry and (3) patient quality of life. Economic data used was mainly related to medication prices and quantities consumed. This data was used in a large number of decisions and seemed to have more importance in hospitals than in clinics. Information related to resources that could be saved by the inclusion of a new medicine on formularies was seldom used and apparently considered less important in hospitals than in clinics. Pharmacoeconomic evaluations were very rarely used. Six barriers to the use of economic data were raised by the pharmacists, including: lack of time, which limits the collection and analysis of such information; insufficient health economics training, an obstacle to decision-makers' analytical capacity; and closed budgets within hospitals.

CONCLUSION

Economic data concerning 'medication budgets' appears to have a greater impact in public and semi-private hospitals than in private clinics. Obstacles linked to the decision-making context itself were particularly highlighted, and it can be concluded that in order to increase the use of economic data, it is first necessary to create an environment that is more favourable to its application.

The driving force in hospital formularies: economics versus efficacy

The rising cost of pharmaceuticals has created a focus on hospital cost containment. From 1990 to 2000, spending on prescription drugs increased 200%. Through a variety of mechanisms and contracting, hospital formularies have become increasingly more restrictive. Physician choice with regard to antibiotics specifically is becoming more limited. The field of pharmacoeconomics looks at the cost effectiveness of the drugs we use. The pressures on the pharmaceutical industry and hospitals are reviewed here with a discussion of antibiotic prophylaxis, new expensive therapies, and physician responsibility. The driving force behind hospital formulary design is often economic, whereas the physician desires variety and efficacy. This review discusses some of the key issues related to drug costs and expenditures.

A novel method of estimating cost of therapy by using patient population characteristics: analysis of fluoroquinolones in various populations with different distributions of renal function

INTRODUCTION

Formulary decisions regarding a given drug class are often made in the absence of patient outcome and/or sophisticated pharmacoeconomic data. Analyses that consider factors beyond simple acquisition costs may be useful in such situations. For example, the cost implications of using manufacturers' recommendations for dosing in patients with renal dysfunction may be important, depending on the distribution of various levels of renal function within a patient population.

METHODS

Using four 1000-patient populations representing different renal function distributions and a fifth population of our medical center's distribution, we determined the costs of therapy for intravenous and oral levofloxacin, gatifloxacin, and moxifloxacin for a 10-day course of therapy for community-acquired pneumonia. Costs considered were average wholesale prices (AWPs), 50% of AWP, or same daily price, plus intravenous dose preparation and administration costs when applicable. Costs for each renal function distribution were examined for significant differences with an analysis-of-variance test. Also, costs of failing to adjust dosing regimens for decreased renal function were determined.

RESULTS

Differences in fluoroquinolone costs (AWP, 50% AWP, or when matched as the same daily price) among the populations were found. When considering same daily prices, differences among populations ranged from about 35,000 dollars with intravenous gatifloxacin to more than 51,000 dollars for intravenous levofloxacin (all fluoroquinolones, p>0.05). Within a population, differences in costs among the intravenous fluoroquinolones ranged from 47,000-99,000 dollars. Rank orders of the drugs and population costs of therapy were affected by the pricing structure used and varied by the specific population and drug. Differences among the fluoroquinolones or populations were much smaller (<2100 dollars) when considering oral regimens. Costs potentially incurred by failing to adjust dosing for renal function were substantial.

CONCLUSION

Formulary decisions can be facilitated by considering factors such as patient characteristics and related dosing in addition to simple acquisition costs. In our example, consideration of the distribution of renal function within a given patient population and related dosing for these fluoroquinolones revealed potentially important differences within the class.

Routine cycling of antimicrobial agents as an infection-control measure

Antimicrobial cycling is the deliberate, scheduled removal and substitution of specific antimicrobials or classes of antimicrobials within an institutional environment (either hospital-wide or confined to specific units) to avoid or reverse the development of antimicrobial resistance. True antimicrobial cycling requires a return to the antimicrobial(s) that were first used. Testing of the hypothesis that cycling will result in a lower prevalence of resistance is ongoing, mostly occurs within intensive care units, and largely involves cycling regimens targeted for treatment of suspected gram-negative bacterial infections. Unfortunately, there has been insufficient study to determine whether any meaningful impact on resistance has occurred as a result of a cycling program. Mathematical models question the usefulness of cycling as an infection-control method. Published studies demonstrate that cycling may be one way to change prescribing practices by clinicians without sacrificing patient safety. However, optimizing antimicrobial use through traditional and novel methods (e.g., computer decision support) should not be abandoned.

Formulary decision-making about cephalosporins with similar therapeutic uses

The various costs and intangible factors that enter into formulary decisions in an era of increasingly frequent drug product shortages that can adversely affect patient care and increase treatment costs are described. Pharmacy administration at Carolinas HealthCare System analyzed the costs associated with making a formulary switch from the third-generation cephalosporin ceftriaxone to cefotaxime, which recently became available in generic form and has a similar spectrum of antimicrobial activity and therapeutic uses. Hard dollar costs for purchasing drugs and the supplies needed to administer them; soft dollar costs for staff time spent acquiring, preparing, and administering doses; and intangible factors were considered. A reliable supply of drug product from the manufacturer was an important intangible factor because of frequent drug shortages in the past few years and the adverse effect on patient care and the increased soft dollar costs associated with these shortages. Administrators at Carolinas HealthCare System decided not to make the proposed formulary change after weighing the many factors and costs.

Antimicrobial formularies: can they minimize antimicrobial resistance?

The relationship between antimicrobial drug use and resistance rates and the implications for antimicrobial formularies are described. Efforts to restrict antimicrobial drug use to reduce resistance in certain microorganisms have been accompanied by increases in resistance in other microorganisms. Random cycling of a variety of antimicrobial agents to treat infections caused by the same microorganism in different patients within a health care institution has been advocated as a means to reduce antimicrobial resistance. Analysis of actual antimicrobial drug use and resistance data from a network of 40 hospitals revealed wide variability in antimicrobial use. The specific type and volume of antimicrobial agents used appear to play key roles in determining resistance rates. It may be feasible to optimize diversity in antimicrobial drug use and minimize resistance by making judicious changes to the antimicrobial formulary.

Formulary management strategies for type 3 serotonin receptor antagonists

The efficacy of type 3 serotonin (5-hydroxytryptamin) (5-HT3) receptor antagonists in preventing nausea and vomiting associated with cancer chemotherapy, radiation therapy, and surgery and the role of practice guidelines for the use of these agents in controlling antiemetic drug costs without compromising patient care are described. Nausea and vomiting caused by cancer chemotherapy, radiation therapy, and surgery can have a negative impact on quality of life and patient outcomes. The 5-HT3 receptor antagonists are effective for preventing nausea and vomiting from these causes. Oral 5-HT3 receptor antagonist therapy is as effective as intravenous therapy, while usually costing less. Various factors associated wtih the patient and the chemotherapy, radiation therapy, or surgery that increase the risk for nausea and vomiting have been identified. Practice guidelines have been developed in which 5-HT3 receptor antagonist therapy is reserved for patients at high risk for nausea and vomiting based on these various factors. The use of such practice guidelines at Memorial Sloan-Kettering Cancer Center limited antiemetic drug expenditures despite an increase in the number of patients receiving cancer treatment without compromising emetic control or quality of life. The use of special order forms improved compliance with the practice guidelines.

Lansoprazole overutilization: methods for step-down therapy

OBJECTIVE

To identify the documented indications for long-term therapy with lansoprazole 30 mg twice daily at the Veterans Affairs Pittsburgh Healthcare System, assess compliance with appropriate use criteria, evaluate patients eligible for step-down therapy, and recommend appropriate step-down therapy in order to improve patient care, decrease overprescribing, and reduce medication costs.

STUDY DESIGN

Prospective intervention.

METHODS

The records of all patients with prescriptions for lansoprazole 30 mg twice daily as of June 2000 were reviewed. Patients were interviewed to assess medication compliance and symptom control and to provide education on lifestyle modifications. Interventions with the providers were completed to encourage step-down therapy in appropriate patients.

RESULTS

Two hundred forty-eight patients with active prescriptions for twice-daily lansoprazole were reviewed. Of these patients, 66% (n = 163) did not have an indication compliant with the medical center's guidelines for use of lansoprazole 30 mg twice daily. Of these, 88% (n = 143) had no documented attempt at step-down therapy and 49% (n = 80) had no documented gastrointestinal workup. Interventions for step-down therapy were recommended for 48% (n = 120) of the 248 patients. Forty-six percent (n = 60) of recommendations were accepted, resulting in a cost savings of dollars 85000 per year.

CONCLUSIONS

A high rate of clinician noncompliance with the guidelines for appropriate use of lansoprazole 30 mg twice daily was found. These prescribing patterns resulted in significant cost concerns. Our review and interventions led to step-down therapy for almost half of the patients receiving twice-daily lansoprazole. This review of patient records and intervention with primary care providers resulted in cost reduction and offered an opportunity to educate patients on beneficial lifestyle modifications.

Impact of a web-based antimicrobial approval system on broad-spectrum cephalosporin use at a teaching hospital

OBJECTIVE

To achieve sustained improvement in use of cefotaxime and ceftriaxone (CEFX) in a major teaching hospital, as measured against national antibiotic guidelines.

DESIGN AND SETTING

Pre- and post-intervention survey of CEFX use in the Royal Melbourne Hospital, a tertiary hospital in Melbourne, Victoria.

INTERVENTION

Web-based antimicrobial approval system linked to national antibiotic guidelines was developed by a multidisciplinary team and implemented in March 2001.

MAIN OUTCOME MEASURES

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.

RESULTS

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).

CONCLUSION

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.

Use of unlicensed and off-label medications in paediatric gastroenterology with a review of the commonly used formularies in the UK

BACKGROUND

Use of unlicensed and off-label medications is common in hospital based paediatric practice. Whilst inpatient prescription can be closely monitored within the hospital setting, it is subspecialties like paediatric gastroenterology, caring for chronically ill children on an outpatient basis that require administration of regular medications in the community. Local practitioners rely on available paediatric formularies or information provided by the tertiary unit for monitoring and dispensing further prescriptions.

AIM

To assess the proportion of unlicensed and off-label medications prescribed in a paediatric gastroenterology unit to children discharged to the community and assess adequacy of information about these medications in commonly used British formularies.

METHODS

All prescriptions prescribed over a six-month period (Jan-Jul 2002) either in the paediatric gastroenterology outpatient department or for children discharged home after an inpatient stay, were retrieved from the pharmacy database. The main outcome measures were to assess the proportion of medications prescribed for unlicensed or off-label use.

RESULTS

308 patients received 777 prescriptions of which 384 (49%) were for unlicensed or off-label use. Of these 291 (76%) were off-label; 208 in relation to indication and 83 to child's age. 93 of the prescribed medications were unlicensed; 37 were due to manipulation of formulation. Of the commonly used formularies in the UK, only 'Medication for Children(R)' contained dosage information on more than half (9/13) of the most often prescribed off-label/unlicensed medications in paediatric gastroenterology.

CONCLUSIONS

Use of unlicensed and off-label medications remains a problem in paediatric practice. Until licensing laws change and more drugs are licensed in children, paediatric gastroenterologists remain responsible for provision of information to families, local practitioners, nurses and pharmacists. Of the commonly used formularies, 'Medicines for Children' is the most detailed and comprehensive, and should be available to all general practitioners and pharmacists in the UK. Clear communication between specialist units and local practitioners is imperative to ensure safe and effective prescribing to children.

Hospital policies regarding herbal medicines

The prevalence and content of herbal policies and herbal formularies in the hospital setting were studied. Drug information centers affiliated with hospital pharmacies were surveyed by telephone. Hospitals with policies on herbal products were asked to provide detailed information about the policies. Of 70 hospitals included in the analysis, 53 (76%) had policies and procedures on the use of herbal products. Three hospitals (4%) reported having an herbal formulary. A majority of the existing policies required a physician order for an herbal product to be used inhouse. Many of the policies also required pharmacists to verify labeled product ingredients. Product administration, patient consent, and drug interaction screenings were addressed by some hospitals. Most hospitals reported having policies on the use of herbal products, but herbal formularies were rare.

[Trends in antimicrobial utilization in a university hospital, 1990-1996]

OBJECTIVE

There is a worldwide concern about rational drug use, more specifically related to antimicrobial utilization. In developing countries, few resources are intended for monitoring on rational drug use. Moreover, there are limited data on the use of antimicrobial agents in hospitals. A study was carried out to describe patterns of use of antimicrobial agents over a 7-year period (1990 to 1996).

METHODS

The study was conducted in a 690-bed tertiary care university hospital in Porto Alegre, Brazil. Hospital records were reviewed to identify inpatient antibiotics use. Results were expressed in defined daily dose per 100-beds/day. Cluster analysis was performed to determine the trends in use of individual agents.

RESULTS

Antimicrobials use increased year after year, from 83.8 DDD per 100 beds-day in 1990 to 124.58 DDD per 100 beds-day in 1996. Penicillins were the drug group mostly used (39.6%), followed by cephalosporins (15.0%), aminoglycosides (14.4%), sulfonamides (12.8%), glycopeptides (3.6%), and lincosamides (3.1%). These groups were responsible for around 90% of all agents used. The use of antimicrobial agents was divided into thirteen groups based on cluster analysis.

CONCLUSIONS

Antimicrobial use increased dramatically in the study period, and this increase was significantly higher when compared to other studies. When newer alternative agents became available in the hospital, the use of already existing drugs decreased and in some cases remained relatively stable. After implementing specific interventions, such as an effort for the correct use of cefoxitin, the expected changes in use were observed.

Building a better online formulary

The history of and improvements made to the University of Michigan Health System (UMHS) inpatient online formulary are described. The current formulary at UMHS is the third version of the Web-based formulary. The original effort in 1997 consisted of converting word-processing documents to HTML format and exporting this information to the university's intranet. There was no mechanism to search for formulary items, no therapeutic class cross-referencing, and no cost information. Documents and their conversion had to be manually maintained. The second version incorporated a series of automatic daily computer downloads from the inpatient pharmacy computer system. Web pages were built to dynamically display the formulary information from the database based on users' requests. The formulary enabled searching by brand or generic names, provided therapeutic category cross-references, listed the location of products within automated dispensing cabinets, provided accurate cost information, and was always up-to-date. Maintenance efforts drastically decreased. The current version has incorporated additional logic to meet users' needs. If no matches are found, the system expands its search by automatically linking to UMHS's inpatient pharmacy system repository of all drugs, finding matches to what the user entered, and then returning the names of therapeutically similar formulary agents to the user. A cross-index feature allows the system to return all the drugs that fall under the searched therapeutic category. Dramatic improvements have been made to UMHS's inpatient online formulary in the past two years. The current formulary provides a very low-cost, easily maintainable, and effective means to access the formulary and clinically relevant and timely information specific to each medication.