Pharmacy World & Science

, 31:664 | Cite as

Investigating unused medications in New Zealand

Research Article


Objective The objectives of this study were to determine the reasons for returning medications unused and the types of unused medications returned based on therapeutic class. Setting: This study was conducted in a region of New Zealand covered by the Hutt Valley District Health Board. This region has approximately 51,000 households. Methods A ‘Disposal of Unwanted Medication Properly (DUMP)’ campaign was conducted for a four week period in November 2007 in the Hutt Valley DHB region. A collection bag was delivered to every household for the collection and disposal of any unused medications. Participants were instructed to return the bags to a community pharmacy. Those returning medications were also asked to complete a questionnaire to determine why the medications were not used. A sample of the returned medications was identified and quantified and every completed questionnaire was analysed. Main outcome measures: The main outcome measures included: types and quantities of medications returned, calculated costs of these medications and reasons for returns. Results Over the four week period, 1,605 bags were returned for disposal. A total of 329 bags (20%) containing a total of 1,253 items were fully analysed. Only 653 questionnaires were completed (41%) all of which were analysed. The most commonly reported reason for not using the medication was that it had passed the expiry date (26%), the second was treatment change (24%), followed by condition resolved (15%). ‘Alimentary tract & metabolism’ and ‘respiratory systems & allergies’ accounted for 21 and 20% of cost respectively. Conclusions This study found that main reasons identified for patients having unwanted medications were ‘treatment changes’ and ‘expired’. Additionally respiratory medications contributed 20% of the costs associated with unused medications.


Adherence Medication waste New Zealand 



Hutt Valley DHB and their local pharmacies for their participation.


New Zealand Pharmacy Education Research Fund for the funding of the summer studentship for GG.

Conflicts of interest statement

The authors have no conflicts of interest to declare.


  1. 1.
    Daughton CG. Cradle-to-cradle stewardship of drugs for minimizing their environmental disposition while promoting human health. II. Drug disposal, waste reduction, and future directions. Environ Health Perspect. 2003;111(5):775–85.PubMedGoogle Scholar
  2. 2.
    Langley C, Marriott J, Mackridge A, Daniszewski R. An analysis of returned medicines in primary care. Pharm World Sci. 2005;27(4):296–9.CrossRefPubMedGoogle Scholar
  3. 3.
    Daniszewsi R, Langley C, Marriott J, Wilson K, Clewes P, Wilkinson M. An investigation of medicines returned to general practitioners and community pharmacies. Int J Pharm Pract. 2002;10(S):R42.Google Scholar
  4. 4.
    Braybrook S, John D, Leong K. A survey of why medicines are returned to pharmacies. Pharm J. 1999;263(7063):13–5.Google Scholar
  5. 5.
    Ekedahl AB. Reasons why medicines are returned to Swedish pharmacies unused. Pharm World Sci. 2006;28(6):352–8.CrossRefPubMedGoogle Scholar
  6. 6.
    Domino ME, Olinick J, Sleath B, Leinwand S, Byrns PJ, Carey T. Restricting patients’ medication supply to one month: saving or wasting money? Am J Health Syst Pharm. 2004;61(13):1375–9.PubMedGoogle Scholar
  7. 7.
    Pharmaceutical Management Agency (Pharmac). Annual Review 2007. Last accessed 7 Apr 2009.
  8. 8.
    Brady K. Pharmaceutical Management Agency: changes to the frequency of medicine dispensing. Office of the Auditor-General; 2005. Accessed 4 Mar 2006.
  9. 9.
    Braund R, Yuen Y, Jung J. Identification and quantification of medication returned to Otago pharmacies. NZ Fam Physician. 2007;34:258–62.Google Scholar
  10. 10.
    Braund R, Chuah F, Gilbert R, Gn G, Soh A, Tan L, et al. Identification of the reasons for medication returns. NZ Fam Physician. 2008;35(4):248–52.Google Scholar
  11. 11.
    Ministry of Health Annual Report - Health and Independence. 2005.$File/annual-report0506.pdf. Last accessed 7 Apr 2009.
  12. 12.
    Mansur N, Weiss A, Beloosesky Y. Is there an association between inappropriate prescription drug use and adherence in discharged elderly patients? Ann Pharmacother. 2009;43:177–84.PubMedGoogle Scholar
  13. 13.
    Coma A, Modamio P, Lastra CF, Bouvy ML, Marino EL. Returned medicines in community pharmacies of Barcelona, Spain. Pharm World Sci. 2008;30(3):272–7.CrossRefPubMedGoogle Scholar
  14. 14.
    Cameron S. Study by Alberta pharmacists indicates drug wastage a “mammoth” problem. CMAJ. 1996;155(11):1596–8.PubMedGoogle Scholar
  15. 15.
    Paterson JM, Anderson GM. “Trial” prescriptions to reduce drug wastage: results from Canadian programs and a community demonstration project. Am J Manag Care. 2002;8(2):151–8.PubMedGoogle Scholar
  16. 16.
    Mackridge AJ, Marriott JF. Returned medicines: waste or a wasted opportunity? J Public Health (Oxf). 2007;29(3):258–62.CrossRefGoogle Scholar
  17. 17.
    Ulrik CS, Backer V, Soes-Petersen U, Lange P, Harving H, Plaschke PP. The patient’s perspective: adherence or non-adherence to asthma controller therapy? J Asthma. 2006;43(9):701–4.CrossRefPubMedGoogle Scholar
  18. 18.
    Anis AH, Lynd LD, Wang XH, King G, Spinelli JJ, Fitzgerald M, et al. Double trouble: impact of inappropriate use of asthma medication on the use of health care resources. CMAJ. 2001;164(5):625–31.PubMedGoogle Scholar
  19. 19.
    Molimard M, Le Gros V. Impact of patient-related factors on asthma control. J Asthma. 2008;45(2):109–13.CrossRefPubMedGoogle Scholar
  20. 20.
    Mehuys E, Van Bortel L, De Bolle L, Van Tongelen I, Annemans L, Remon JP, et al. Effectiveness of pharmacist intervention for asthma control improvement. Eur Respir J. 2008;31(4):790–9.CrossRefPubMedGoogle Scholar
  21. 21.
    Osterberg L, Blaschke T. Adherence to medication. New Engl J Med. 2005;353(5):487–97.CrossRefPubMedGoogle Scholar
  22. 22.
    Hugtenburg JG, Blom AT, Kisoensingh SU. Initial phase of chronic medication use; patients’ reasons for discontinuation. Br J Clin Pharmacol. 2006;61(3):352–4.CrossRefPubMedGoogle Scholar
  23. 23.
    Braund R, Peake BM, Shieffelbien L. Disposal practices for unused medications in New Zealand. Environ Int. 2009;35:952–5.CrossRefPubMedGoogle Scholar

Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  1. 1.School of PharmacyUniversity of OtagoDunedinNew Zealand

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