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Current status of prospective drug utilization review.

BACKGROUND: The Omnibus Budget Reconciliation Act of 1990 offered the promise that prospective drug utilization review (pDUR) systems would improve the quality of drug prescribing and patient drug use. There is little evidence that this promise has been fulfilled. To the contrary, there is growing evidence that suboptimal use of drugs (in terms of preventable drug-related morbidity) is at least as costly as the prescription drugs themselves. Online computerized pDUR has been the subject of numerous critical examinations in the pharmacy and medical literature. Recent publications have sought to illustrate perceived shortcomings in the DUR systems currently in use. OBJECTIVE: We focus on the state of the art with regard to pDUR, what is known about its effectiveness, and how emerging technologies may change pDUR and consider the work that may be needed to establish its effectiveness. SUMMARY: A growing body of literature documents numerous problems and concerns with respect to the quality of DUR criteria, DUR alerts, and the response of health care professionals to these alerts. Problems with the current pDUR "system" can be grouped into those involving technical aspects (e.g., duplicate messaging from in-store and online systems, or message text limitations) and into those involving human aspects, specifically how pharmacists and other health care providers interpret and respond to potential drug therapy problem alerts generated by the electronic systems. CONCLUSION: DUR is a quality assurance system that holds promise as a tool that, if implemented effectively, could enhance appropriate drug use. We believe a more systematic approach to DUR is needed. Evaluation and management of public and private pDUR systems must link documentation of processes of care, such as pharmacists. cognitive services, patient interventions, etc. To address technical aspects, we strongly recommend (a) a national effort to validate DUR screen criteria relying upon evidence-based studies and (b) adoption of a minimal set of.critical. pDUR screen criteria by pharmacy service providers and third-party intermediaries, including pharmacy benefit managers. To address the human component of pDUR systems, we advocate (a) adoption of performance standards for pharmacists and (b) explicit remuneration for time spent identifying and responding to drug therapy problems.

Drug Therapy↗

Antidepressant drug use: differences between psychiatrists and general practitioners. Results from a drug utilization observation study with fluoxetine.

Between 1990 and 1993, a series of drug utilization observation studies with fluoxetine (Flx) were conducted in Germany in several waves. 3,158 patients treated by psychiatrists/neurologists (PN) and 15,601 patients treated by general practitioners/internists (GPI) were included; data collection at start and end of treatment focussed on diagnoses, symptoms, prescription, comedication, efficacy (CGI, Zung scale), and adverse events. Differences between PN and GPI patients were of major interest. For more than 90% of both the PN and the GPI cases. Fix was used for the indication of "depression", with a dosis of 20 mg/day. More PN patients (47%) than GPI patients (28%) were diagnosed as "endogenous"; GPI patients more often presented with first episodes (36 vs. 24%). "suicidal ideation" was less prominent compared to PN subjects (17 vs. 28%). Psychotropic comedication was regarded as necessary in 39% (PN) and 10% (GPI) of the cases. Early treatment termination because of "remission/major improvement" was observed in 13% (PN) vs. 21% (GPI) and because of "adverse events" in 11% (PN) vs. 3% (GPI) of the patients. At observation end, 53% (PN) vs. 74% (GPI) were rated as "symptom-free/markedly improved" (CGI); self-ratings reflected comparable results, marked improvements over time, but still PN/GPI differences at the end. "Suicidality" related to depression was more pronounced in the PN group at both points in time. 24% (PN) vs. 6% (GPI) of the cases reported "routine" adverse events, while in 2% (PN) and 1% (GPI) "serious" adverse events were observed. (For all the above comparisons p < 0.001 to < 0.0001.) These findings reveal that-under routine conditions handled by PNs and GPIs-Fix shows an efficacy and safety consistent with clinical trial data. The body of data suggests that PN patients present with more severe depression and more suicidality, require more comedication, and end up with a poorer outcome. Differences in the physicians' perception of psychiatric and somatic symptomatology and their treatment routines may also have something to do with the PN/GPI group differences observed.

Adolescent↗

Drug utilization review in an HMO. I. Introduction and examples of methodology.

An experimental drug utilization review program was developed for a health maintenance organization (HMO). The objectives of the program were to develop and implement an ongoing mechanism for reviewing drug use using criteria based on the scientific literature, and to evaluate the effect of the drug use review program on physician precribing patterns. Seven therapeutic categories of drugs, accounting for over 65 per cent of prescribing, were selected and criteria developed for their use. The drug use review prcedure is described briefly. The evaluation of the drug use review program is based on a comparison of rates of prescription use for specific therapeutic categories before and after the criteria were ceveloped and approved. As an example, data for the antihistamine therapeutic category are presented. Criteria for prescribing antihistamines suggested restricting use of combination cold preparations and refraiming from antihistamine use in viral upper respiratory tract infections. After the criteria were adopted, prescribing of antihistamines for viral URIs declined, particularly in pediatrics. In general, prescribing of combination antihistamine preparations did not change; where one combination preparation was deleted from the formulary, prescribers appeared to substitute another combination preparation.

Adolescent↗

[Neuroleptic drug utilization among schizophrenic outpatients].

BACKGROUND: Our objective was to describe and compare neuroleptic drug utilization patterns among French schizophrenic outpatients in public and private care settings. METHODS: A cross sectional survey was carried out by a random sample of 61 public and 112 private psychiatrists who registered for one month all schizophrenic adult outpatients treated with a neuroleptic drug. Among registered patients, each psychiatrist was to include a maximum of 18 patients (public setting) or 9 patients (private setting). Statistical analysis was weighted to take into account for psychiatrist activity level, assessed by patient registration. RESULTS: Psychiatrists included 934 patients in the public care setting and 927 patients in the private care setting. Patients were (mean+/-sd) 40.1+/-12.1 years old, 60.9% men. The patients' social and clinical characteristics were less favorable in the public setting than in the private setting: no professional activity (78.9% vs 65.1%), living in institution (7.2% vs 3.7%), under legal protection (35.1% vs 14.5%), drug abuse (9.6% vs 5.6%). An atypical neuroleptic was prescribed for 63.0% of patients and a classic neuroleptic for 49.7%, an association of neuroleptics for 22.0%. In both settings, the most prescribed neuroleptics were olanzapine (28.0%) and risperidone (18.6%) with a higher mean daily dosage in the public care setting. At least one neuroleptic treatment change (drug and/or dosage) occurred during the previous year for 44.9% and 39.2% patients, in public and private settings, respectively. In both settings, reasons for changes were mainly lack of efficacy (55.1%) and side effects (49.8%). CONCLUSION: Public and private care populations were different but not as much as expected. In both settings, atypical neuroleptics were the predominant drugs used in the treatment of schizophrenia outpatients. The high frequency of drug change for lack of efficacy or side effects demonstrates the difficulties with the use of the present neuroleptic armamentarium.

Adolescent↗

Drug utilization in internal medicine wards at a teaching hospital serving a developing community.

Drug utilization, i.e. prescribing, was investigated in four general internal medicine wards at Ga-Rankuwa Hospital, the main teaching hospital for the Medical University of Southern Africa. Survey forms for computer processing were designed to cover important patient parameters (including diagnosis) and to classify drugs into the most frequently used therapeutic groups. There were 154 patients in the survey which took place over a 2-week period in July 1983. Analysis of the diagnosis data showed that cardiovascular disorders (34,4% of the total) and infectious and parasitic diseases (29,2%) predominated. Data for drugs prescribed revealed a preponderance of anti-infective agents (29,7%), diuretics (12,0%), cardiovascular preparations (10,5%) and respiratory medicines (8,1%). The predominant two disease groups and four drug groups were subjected to further analysis. Detailed results which cover specific disease entities and individual drugs are presented. A clear picture of the respective disease patterns and drugs prescribed has emerged. The implications are discussed with reference to the population which the hospital serves, therapeutic needs and medical education.

Anti-Infective Agents↗

Using the PAS system for hospital drug utilization review.

The PAS system, subscribed to by many hospitals, is readily adaptable to drug usage review. Useful for this purpose are PAS data on drug usage according to (1) drug type, (2) diagnosis, and (3) information supplied at patient admission. The PAS system also permits "special coding," or "targeting," of other data for review. Whatever the drug utilization system used, pharmacist input into the process is highly important.

Commission on Professional and Hospital Activities↗

Drug utilization review in a teaching hospital: experience with vancomycin.

A prospective, two-phase, drug utilization review (DUR) was performed at the Royal Adelaide Hospital (RAH) to determine the extent and pattern of vancomycin use. For all patients commencing oral or parenteral vancomycin, treatment indication, route of administration, duration of therapy, results of culture and sensitivity tests, adverse drug reactions and results of therapeutic drug level monitoring were recorded. Vancomycin courses were classified as being for therapy or prophylaxis and compared with predetermined audit criteria to assess appropriateness of use. During the 8 week initial phase, data on 62 treatment courses in 59 patients were recorded, 50% for therapy and 50% for prophylaxis. Sixty four percent were classified as inappropriate, occurring in 32% of therapeutic courses and 97% of those for prophylaxis. During the 10 week re-evaluation, conducted 10 months later, data for 43 treatment courses in 43 patients were reviewed, 42% for therapy and 58% for prophylaxis. Sixty five percent were inappropriate occurring in 17% of therapeutic courses and 100% of the prophylactic courses. When compared with the initial phase, the re-evaluation demonstrated a decrease in the empirical use of vancomycin in the combination treatment of neutropaenic fever and also in the duration of vancomycin use for surgical prophylaxis. During both study phases, criteria contraventions were mostly due to inappropriate indication or duration of therapy. The cost of inappropriate vancomycin use was reduced by over 50% between survey phases, from $Aus11,500 or 55% of total vancomycin cost during the initial phase to $Aus3,600 or 25.7% during the re-evaluation. The most effective of the remedial strategies implemented after the initial phase was direct consultation with prescriber groups.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗

Methods to assess health economic aspects on drug utilization.

The increasing rate of drug consumption is influenced by different trends which are partly counter-rotating. The increasing rate of price is statistically to separate from effects influenced by structural shifts in the drug spectrum. The analysis based on a randomized sample (0.1%) of all prescriptions in the Federal Republic of Germany in 1984 give the following: Total expenditure +7.4%; sold packages -1.6%; average value per prescription +9.2%; price +2.8%; shift in the structure of consumption +6.0%. The shift in drug consumption influenced by changes in demand or prescription habits were more intensive than price effects in 1984.

Drug Prescriptions↗

Reliability of drug utilization evaluation as an assessment of medication appropriateness.

OBJECTIVE: To test the reliability of drug utilization evaluation (DUE) applied to medications commonly used by the ambulatory elderly. METHODS: A DUE model was developed for four domains: (1) justification for use, (2) critical process indicators, (3) complications, and (4) clinical outcomes. DUE criteria specific to use in the elderly were developed for angiotensin-converting enzyme (ACE) inhibitors and histamine2 (H2)-antagonists, and consensus was reached by an external expert panel. After pilot testing, two clinical pharmacists independently evaluated these medications, applying the DUE criteria and rating each item as appropriate or inappropriate. Interrater and intrarater reliability was assessed by using kappa statistics. RESULTS: In a sample of 208 ambulatory elderly veterans, 42 (20.2%) were taking an ACE inhibitor and 56 (26.9%) an H2-antagonist. The interrater agreement for individual domains, represented by kappa statistics, were 0.10-0.58 and 0-0.83 for ACE inhibitors and H2-antagonists, respectively. The kappa statistic for overall agreement, which considered ratings from all criteria across all domains, was 0.24 for ACE inhibitors and 0.18 for H2-antagonists. Intrarater reliability was assessed 3 months later, and kappa statistics were 0.61-0.65 (0.49 overall) and 0-0.96 (0.81 overall) for ACE inhibitors and H2-antagonists, respectively. CONCLUSIONS: Intrarater reliability for DUE was good to excellent. However, interrater reliability exhibited only marginal reproducibility, particularly where evaluators were required to use subjective judgement (i.e., complications, clinical outcomes). DUE may not be a suitable standard for assessing medication appropriateness in ambulatory elderly patients.

Aged↗

Drug utilization in general practice: prescribing habits of National Formulary drugs by GPs of Emilia Romagna (Italy) in 1988 and 1989.

Two years of prescriptions for all the drugs included in the Italian National Formulary by 3,866 general practitioners, in a region of Northern Italy of almost 4 million inhabitants, were analysed to determine the pattern of drug use. The data (official code and proprietary name of the drug, number of packages prescribed, price of the drug, dispensing pharmacy, and date of dispensing) were collected monthly by retail pharmacies and were recorded and organized in database files. Quantitative and qualitative profiles of prescription patterns were studied for all the major therapeutic areas. Overall drug prescriptions averaged 600 DDD/1,000 inhabitants/day. Comparison of 1988 and 1989 data showed only a slight increase in total drug prescriptions, but greater changes were detected in certain drug groups, especially those recently marketed. Overprescription of well-documented drugs, such as H2-antagonists, ACE-inhibitors, calcium antagonists and the HMG-CoA-reductase inhibitors, in comparison to other countries was shown. There was frequent prescribing of drugs devoid of documentation of their clinical efficacy, which were mainly given for clinical conditions lacking a specific treatment, or as placebos for minor disorders. The data demonstrate the need for educational intervention to improve the quality of drug prescribing habits in primary health care in Italy.

Drug Prescriptions↗

Drug utilization in Panama.

The availability and use of therapeutic agents in Panama is critically reviewed. Of the 3800 drug products on the market, 50% are vitamins, tonics and fixed ratio combination products. Many drugs are of unproven efficacy and safety, not marketed in more developed countries. Hospital and outpatient studies have documented inappropriate prescribing habits. To improve drug utilization, regulatory and educational strategies have been implemented in the Panama Social Security Institute. Drugs of doubtful or no value and unnecessary duplications have been withdrawn from its therapeutic formulatory. Outreach services provided by the Panama Social Security Institute include the distribution of a drug bulletin, workshops, seminars and person to person drug information (counterdetailing) to health personnel. Drug information to patients is also included in the overall strategy to promote the rational use of drugs. Nevertheless, much work is still needed to formulate and implement an essential drugs and health policy in Panama.

Drug Utilization↗

Drug utilization studies: a tool for determining the effectiveness of drug use.

To evaluate the quality of the consumption of medicines in Spain, its potential efficacy, and its evolution during the last years, an assessment of the 'intrinsic value' of the most sold pharmaceutical specialities (amounting to more than 50% of total pharmaceutical market) was carried out. A panel of five clinical pharmacologist classified medicines, according to their intrinsic value, in four groups: (i) 'high value' (41% of analyzed medicines in 1980); (ii) 'relative value' (12% in 1980); (iii) 'doubtful value' (3%); (iv) 'no value' (23%), and (v) 'unacceptable value' (21%). Drugs were also classified according to their expected potential of use; and three groups were formed: (i) 'high' (32%); (ii) 'relatively high' (14%), and (iii) 'reduced' (10%). A fourth group of 'not applicable' (44%) in this classification was formed with pharmaceuticals considered unvaluable or unacceptable in the first classification. The results of this study suggest that this kind of analysis may be a useful tool to evaluate the efficacy of drugs in the community, and to identify priorities and guidelines in the selection of drugs in each country.

Drug Therapy↗