Rational use of drugs: an overview Kathleen Holloway Technical Briefing Seminar November 2008 Department of Essential Medicines and Pharmaceutical Policy TBS 2008 Objectives • Define rational use of medicines and identify the magnitude of the problem • Understand the reasons underlying irrational use • Discuss strategies and interventions to promote rational use of medicines • Discuss the role of government, NGOs, donors and WHO in solving drug use problems Department of Essential Medicines and Pharmaceutical Policy TBS 2008 The rational use of drugs requires that patients receive medications appropriate to their clinical needs, in doses that meet their own individual requirements for an adequate period of time, and at the lowest cost to them and their community. WHO conference of experts Nairobi 1985 • correct drug • appropriate indication • appropriate drug considering efficacy, safety, suitability for the patient, and cost • appropriate dosage, administration, duration • no contraindications • correct dispensing, including appropriate information for patients • patient adherence to treatment Department of Essential Medicines and Pharmaceutical Policy TBS 2008 Adequacy of diagnostic process Source: Thaver et al SSM 1998, Guyon et al WHO Bull 1994, Krause et al TMIH 1998, Bitran HPP 1995, Bjork et al HPP 1992, Kanji et al HPP 1995. Pakistan Bangladesh Burkino Faso Senegal Angola Tanzania 0 10 20 30 40 50 % observed consultations where the diagnostic process was adequate Department of Essential Medicines and Pharmaceutical Policy TBS 2008 60 5-55% of PHC patients receive injections 90% may be medically unnecessary Source: Quick et al, 1997, Managing Drug Supply A F R IC A G ha na C a m e ro o n N ige ria S uda n T a nza nia Z im ba bwe A S IA Yemen Indo ne s ia 15 billion injections per year globally half are with unsterilized needle/syringe 2.3-4.7 million infections of hepatitis B/C and up to 160,000 infections of HIV per year associated with injections N e pa l L.A M E R . & C A R . E c ua do r G ua t e m a la E l S a lv a do r J a m a ic a E a s t e rn C a ribe a n 0% 10% 20% 30% 40% 50% % of primary care patients receiving injections Department of Essential Medicines and Pharmaceutical Policy TBS 2008 60% Variation in outpatient antibiotic use in 26 European countries in 2002 35 DDD per 1000 inh. per day 30 25 20 15 10 5 0 FR GR LU PT IT BE SK HR PL IS IE ES FI BG CZ SI SE HU NO UK DK DE LV AT EE NL Source: Goosens et al, Lancet, 2005; 365: 579-587; ESAC project. Department of Essential Medicines and Pharmaceutical Policy TBS 2008 % compliance with clinical guidelines over time by region 70 60 50 40 30 20 10 0 <1992 1992-5 1996-9 2000-3 Africa (n=125) Asia/Pacific (n=61) Central Asia/Mediterranean (n=22) Latin America (n=31) Department of Essential Medicines and Pharmaceutical Policy TBS 2008 2004-7 % diarrhoea cases treated Treatment of diarrhoea in private and public sectors 70 60 50 40 30 20 10 0 ORS use Antibiotic use Private-for-profit (n=43,33,35,4) Antidiarrhoeal use STG compliance Public (n=119, 100, 67, 80) Department of Essential Medicines and Pharmaceutical Policy TBS 2008 Treatment of ARI by prescriber type % ARI cases treated 80 70 60 50 40 30 20 10 0 Cough syrup use Approp.ABs in pneumonia Doctor (n=20,18,40,12) Inapprop.ABs in viral URTI STG compliance Paramedic/nurse (n=13,94,69,61) Department of Essential Medicines and Pharmaceutical Policy TBS 2008 Overuse and misuse of antimicrobials contributes to antimicrobial resistance Source: WHO country data 2000-3 • Malaria – choroquine resistance in 81/92 countries • Tuberculosis – 0-17 % primary multi-drug resistance • HIV/AIDS – 0-25 % primary resistance to at least one anti-retroviral • Gonorrhoea – 5-98 % penicillin resistance in N. gonorrhoeae • Pneumonia and bacterial meningitis – 0-70 % penicillin resistance in S. pneumoniae • Diarrhoea: shigellosis – 10-90% ampicillin resistance, 5-95% cotrimoxazole resistance • Hospital infections – 0-70% S. Aureus resistance to all penicillins & cephalosporins Department of Essential Medicines and Pharmaceutical Policy TBS 2008 Adverse drug events Source: Review by White et al, Pharmacoeconomics, 1999, 15(5):445-458 • 4-6th leading cause of death in the USA • estimated costs from drug-related morbidity & mortality 30 million-130 billion US$ in the USA • 4-6% of hospitalisations in the USA & Australia • commonest, costliest events include bleeding, cardiac arrhythmia, confusion, diarrhoea, fever, hypotension, itching, vomiting, rash, renal failure Department of Essential Medicines and Pharmaceutical Policy TBS 2008 Changing a Drug Use Problem: An Overview of the Process 1. EXAMINE Measure Existing Practices (Descriptive Quantitative Studies) 4. FOLLOW UP Measure Changes in Outcomes (Quantitative and Qualitative Evaluation) improve diagnosis improve intervention 3. TREAT Design and Implement Interventions (Collect Data to Measure Outcomes) Department of Essential Medicines and Pharmaceutical Policy TBS 2008 2. DIAGNOSE Identify Specific Problems and Causes (In-depth Quantitative and Qualitative Studies) Many Factors Influence Use of Medicines Information Scientific Information Influence of Drug Industry Habits Social & Cultural Factors Treatment Choices Workload & Staffing Workplace Intrinsic Prior Knowledge Infrastructure Relationships With Peers Societal Economic & Legal Factors Authority & Supervision Workgroup Department of Essential Medicines and Pharmaceutical Policy TBS 2008 Strategies to Improve Use of Drugs Educational: Inform or persuade – Health providers – Consumers Managerial: Guide clinical practice – Information systems/STGs – Drug supply / lab capacity Use of Medicines Economic: Offer incentives – Institutions – Providers and patients Regulatory: Restrict choices – Market or practice controls – Enforcement Department of Essential Medicines and Pharmaceutical Policy TBS 2008 Educational Strategies Goal: to inform or persuade • Training for Providers – – – – Undergraduate education Continuing in-service medical education (seminars, workshops) Face-to-face persuasive outreach e.g. academic detailing Clinical supervision or consultation • Printed Materials – Clinical literature and newsletters – Formularies or therapeutics manuals – Persuasive print materials • Media-Based Approaches – Posters – Audio tapes, plays – Radio, television Department of Essential Medicines and Pharmaceutical Policy TBS 2008 Impact of Patient-Provider Discussion Groups on Injection Use in Indonesian PHC Facilities Source: Hadiyono et al, SSM, 1996, 42:1185 % Prescribing Injections 80 60 Pre Post 40 20 0 Intervention Control Department of Essential Medicines and Pharmaceutical Policy TBS 2008 Training for prescribers The Guide to Good Prescribing • WHO has produced a Guide for Good Prescribing - a problem-based method • Developed by Groningen University in collaboration with 15 WHO offices and professionals from 30 countries • Field tested in 7 sites • Suitable for medical students, post grads, and nurses • widely translated and available on the WHO medicines website Department of Essential Medicines and Pharmaceutical Policy TBS 2008 Managerial strategies Goal: to structure or guide decisions • Changes in selection, procurement, distribution to ensure availability of essential drugs – Essential Drug Lists, morbidity-based quantification, kit systems • Strategies aimed at prescribers – targeted face-to-face supervision with audit, peer group monitoring, structured order forms, evidence-based standard treatment guidelines • Dispensing strategies – course of treatment packaging, labelling, generic substitution Department of Essential Medicines and Pharmaceutical Policy TBS 2008 RCT in Uganda of the effects of STGs, training and supervision on % of Px conforming to guidelines Source: Kafuko et al, UNICEF, 1996. Randomised group No. health PrePostfacilities intervention intervention Change Control group 42 24.8% 29.9% +5.1% Dissemination of guidelines 42 24.8% 32.3% +7.5% Guidelines + onsite training 29 24.0% 52.0% +28.0% 14 21.4% 55.2% +33.8% Guidelines + onsite training + 4 supervisory visits Department of Essential Medicines and Pharmaceutical Policy TBS 2008 Economic strategies: Goal: to offer incentives to providers an consumers • Avoid perverse financial incentives – prescribers’ salaries from drug sales – insurance policies that reimburse non-essential drugs or incorrect doses – flat prescription fees that encourage polypharmacy by charging the same amount irrespective of number of drug items or quantity of each item Department of Essential Medicines and Pharmaceutical Policy TBS 2008 Pre-post with control study of an economic intervention (user fees) on prescribing quality in Nepal Source: Holloway, Gautam & Reeves, HPP, 2001 Fees (complete drug courses) control fee / Px 1-band item fee 2-band item fee n=11 n=10 n=12 Av. no. items per prescription 2.9 2.9 (+/- 0) 2.9 2.0 (-0.9) 2.8 2.2 (-0.6) % prescriptions conforming to STGs 23.5 26.3 (+2.7%) 31.5 45.0 (+13.5%) 31.2 47.7 (+16.5%) Av.cost (NRs) per prescription 24.3 33.0 (+8.7) 27.7 28.0 (+0.3) 25.6 24.0 (-1.6) Department of Essential Medicines and Pharmaceutical Policy TBS 2008 PHC prescribing with and without Bamako initiative in Nigeria Source: Scuzochukwu et al, HPP, 2002 15.3 no.EDL drugs avail 35.4 21 % pres EDL drugs 93 25.6 % Px with antibiotics 64.7 38 % Px with injections 72.8 2.1 5.3 no.drug items/Px 0 20 21 Bamako PHCs 40 60 12 non-Bamako PHCs Department of Essential Medicines and Pharmaceutical Policy TBS 2008 80 100 Regulatory strategies Goal: to restrict or limit decisions • Drug registration • Banning unsafe drugs - but beware unexpected results – substitution of a second inappropriate drug after banning a first inappropriate or unsafe drug • Regulating the use of different drugs to different levels of the health sector e.g. – licensing prescribers and drug outlets – scheduling drugs into prescription-only & over-the-counter • Regulating pharmaceutical promotional activities Only work if the regulations are enforced Department of Essential Medicines and Pharmaceutical Policy TBS 2008 Proportion of visits with injection Impact of multiple interventions on injection use in Indonesia Interactive group discussion (IGC group only) 100% Seminar (both groups) 80% District-wide monitoring (both groups) 60% 40% 20% 0% 1 3 5 7 9 11 13 15 17 19 21 23 25 Months Comparison group Interactive group discussion Source: Long-term impact of small group interventions, Santoso et al., 1996 Department of Essential Medicines and Pharmaceutical Policy TBS 2008 Varying intervention impact in developing countries Source: WHO database 2007 Intervention type No.studies Median impact Range Printed materials 5 6% +1% to +8% Community education 3 13% 0% to +26% Provider education 24 10% -2% to +31% Provider+Comm.educ 14 11% -4% to +32% Provider supervision 23 14% +1% to +39% Community case mgt 6 19% +3% to +29% Provider group process 9 20% +4% to +41% Essential drug program 2 21% +16% to +25% Provider & Community education + supervision 7 21% +11% to +49% Department of Essential Medicines and Pharmaceutical Policy TBS 2008 What are countries doing to promote the rational use of medicines? national policies Source: EMP pharmaceutical policy database Drug use audit in last 2 years (n=87) National strategy to contain AMR (n=102) Antibiotic OTC non-availability (n=60) Public education on antibiotic use (n=107) DTCs in most referral hospitals (n=92) Drug Info Centre for prescribers (n=118) EML in insurance reimbursement (n=90) STGs updated in last 2 years (n=42) EML updated in last 2 years (n=78) 0 20 40 60 80 % countries implementing policies Department of Essential Medicines and Pharmaceutical Policy TBS 2008 100 Basic training and obligatory continuing medical education (CME) available for health professionals Source: EMP pharmaceutical policy database Obligatory CME (n=99-105) Pharmaco-therapy (n=60-73) Prescribing concepts (n=63-76) Clinical Guidelines (n=68-80) Essential Medicines (n=68-89) 0 20 40 60 80 % countries with basic training available Doctors Nurses and paramedics Department of Essential Medicines and Pharmaceutical Policy TBS 2008 100 Why does irrational use continue? Very few countries regularly monitor drug use and implement effective nation-wide interventions - because… • they have insufficient funds or personnel? • they lack of awareness about the funds wasted through irrational use? • there is insufficient knowledge of concerning the costeffectiveness of interventions? Department of Essential Medicines and Pharmaceutical Policy TBS 2008 What are we spending to promote rational use of medicines ? • Global sales of medicines 2002-3 (IMS): US$ 867 billion • Drug promotion costs in USA 2002-3: US$ >30 billion • Global WHO expenditure in 2002-3: US$ 2.3 billion – Essential Medicines expenditure 2% (of 2.3 billion) – Essential Medicines expenditure on promoting rational use of medicines 10% (of 2%) – WHO expenditure on promoting rational use of medicines 0.2% (of 2.3 billion) Department of Essential Medicines and Pharmaceutical Policy TBS 2008 2nd International Conference for Improving Use of Medicines, Chiang Mai, Thailand, 2004 472 participants from 70 countries http://www.icium.org Recommendations for countries to: • Implement national medicines programmes to improve medicines use • Scale up successful interventions • Implement interventions to address community medicines use Department of Essential Medicines and Pharmaceutical Policy TBS 2008 WHO priorities • Resolution WHA60.16 – Urges Member States " to consider establishing and/or strengthening…a full national programme and/or multidisciplinary national body, involving civil society and professional bodies, to monitor and promote the rational use of medicines " – WHO to support countries to implement resolution • Continue to give technical advice to countries – – – – Model EML and formulary Training on promoting RUM in community, PHC, hospitals Research to identify cost-effective interventions Advocacy Department of Essential Medicines and Pharmaceutical Policy TBS 2008 Health systems with no national programs: •No coordinated action •No monitoring of use of medicines Situational analysis Modifying action plans WHO facilitating multi-stakeholder action in countries Implement & evaluate national action plans Health systems with national programs: •Coordinated action •Regular monitoring of use of medicine Department of Essential Medicines and Pharmaceutical Policy TBS 2008 Develop national plans of action WHO Goal: to support establishment of national programs coordinated by mandated, resourced, multi-disciplinary, national bodies Specific Objectives 1. Develop and pilot a standardised tool to undertake situational analysis and then undertake it in selected countries 2. Support establishment of national programs in selected countries using a multi-stakeholder approach, involving civil society & professional bodies and based on situational analysis 3. Establish global mechanism for sharing info & lessons learnt – Global steering committee to guide global program – Meetings for stakeholders from participating countries 4. External evaluation of strategy after 5 years to review progress with recommendations next 6 years Department of Essential Medicines and Pharmaceutical Policy TBS 2008 Creating the WHO Essential Drugs Library to facilitate the work of national committees Evidencebased clinical guideline Summary of clinical guideline Reasons for inclusion Systematic reviews Key references WHO Model List Cost: - per unit - per treatment - per month - per case prevented Department of Essential Medicines and Pharmaceutical Policy TBS 2008 WHO Model Formulary Quality information: - Basic quality tests - Internat. Pharmacopoea - Reference standards WHO-sponsored training programmes • INRUD/MSH/WHO: Promoting the rational use of drugs • MSH/WHO: Drug and therapeutic committees • Groningen University, The Netherlands / WHO: Problem-based pharmacotherapy • Amsterdam University, The Netherlands / WHO: Promoting rational use of drugs in the community • Newcastle, Australia / WHO: Pharmaco-economics • Boston University, USA / WHO: Drug Policy Issues Department of Essential Medicines and Pharmaceutical Policy TBS 2008 Identifying effective strategies to promote more rational use of drugs • Joint research initiative between WHO/PSM, MSH, Harvard and Boston Universities, and ARCH – over 20 intervention research projects in developing countries • WHO/EMP databases on drug use and policy – quantitative data on drug use and interventions to improve drug use over the last decade – data from MOHs on pharmaceutical policies Department of Essential Medicines and Pharmaceutical Policy TBS 2008 Conclusions • Irrational use of medicines is a very serious global public health problem. • Much is known about how to improve rational use of medicines but much more needs to be done – policy implementation at the national level – implementation and evaluation of more interventions, particularly managerial, economic and regulatory interventions • Rational use of medicines could be greatly improved if a fraction of the resources spent on medicines were spent on improving use. Department of Essential Medicines and Pharmaceutical Policy TBS 2008 Activity Discuss in groups the following questions • What should be the roles of: • government, • NGOs and donors, • WHO, in promoting the rational use of medicines? Department of Essential Medicines and Pharmaceutical Policy TBS 2008