BARRIERS TO CLOZAPINE USE IN TREATMENT-REFRACTORY POPULATION IN KARACHI, PAKISTAN

  • Mujeeb Uddin Shad University of Nevada Las Vegas, USA
  • Shahzain Hasan
Keywords: clozapine, schizophrenia, karachi, treatment-refractory

Abstract

ABSTRACT

 

Background & Objective: Following its volatile emergence after the famous 1975 agranulocytosis scare, clozapine remains to be under-prescribed in Pakistan. It has evidently proven to improve prognosis in such patients when initiated at an early stage. However, healthcare barriers and adverse effects continue to haunt psychiatrists to prescribe it more frequently. Although much research targeting clozapine has been done, the factors responsible for the under-prescription of this drug have never been formally elucidated in Pakistan. This study was designed to investigate the causes accountable for serving as barriers in prescribing clozapine in several outpatient departments in Karachi, Pakistan.

 

Method: A cross-sectional study was conducted over three months (May 2022 to July 2022) using a structured questionnaire from 105 physicians with previous formal training in psychiatry. Statistical analysis was done using the Chi-Square test of association.

 

Results: Out of 105 doctors offering psychiatric services at various locations, 70% mentioned that they were uncomfortable prescribing clozapine earlier in the course, with its adverse effects profile being the most popular reason for its avoidance by the patients and/or their families. Clozapine's availability and its cost were also common barriers to prescribing clozapine. Most doctors agreed that they would have felt more comfortable if they had had some clozapine training and attended clozapine clinics during their training.

 

Conclusion: The anticipation of medication nonadherence and monitoring requirements coupled with overestimating the adverse effect profile stems from inadequate experience with the drug  Steps should be taken by the graduate medical education at the training hospitals to organize clozapine clinics and offer clozapine training to promote the use of this effective drug to improve the prognosis and function suffering from this debilitating illness.

 

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Author Biography

Mujeeb Uddin Shad, University of Nevada Las Vegas, USA

Adjunct Professor, Department of Psychiatry

References

1) World Health Organization. "Schizophrenia." Who. Int, World Health Organization: WHO, 10 January 2022.
Retrieved from: https://www.who.int/news-room/fact-sheets/detail/schizophrenia

2) Health care reform for Americans with severe mental illnesses: report of the National Advisory Mental Health Council. (1993). The American journal of psychiatry, 150(10), 1447–1465.
Retrieved from: https://doi.org/10.1176/ajp.150.10.1447

3) Ansari, I. (2015). Mental Health Pakistan: Optimizing Brains. International Journal of Emergency Mental Health and Human Resilience, 17.
Retrieved from:https://www.omicsonline.org/open-access/mental-health-pakistan-optimizing-brains-1522-4821-17-160.php?aid=37919.

4) Center for Drug Evaluation and Research. Information on clozapine [Internet]. US Food and Drug Administration. FDA; [cited 2022Aug14]. Available from: https://www.fda.gov/drugs/postmarket-drug-safety-information-patients-and-providers/information-clozapine.

5) Center for Drug Evaluation and Research. FDA Drug Safety Communication: FDA modifies monitoring for neutropenia associated with schizophrenia medicine clozapine; approves new shared Rems Program for all clozapine medicines [Internet]. US Food and Drug Administration. FDA; [cited 2022Aug14]. Available from: https://www.fda.gov/drugs/drug-safety-and-availability/fda-drug-safety-communication-fda-modifies-monitoring-neutropenia-associated-schizophrenia-medicine.

6) Clozapine (clozaril and FazaClo) [Internet]. NAMI. [cited 2022Aug14]. Available from: https://www.nami.org/About-Mental-Illness/Treatments/Mental-Health-Medications/Types-of-Medication/Clozapine-(Clozaril-and-FazaClo).

7) Shah, P., Iwata, Y., Plitman, E., Brown, E. E., Caravaggio, F., Kim, J., Nakajima, S., Hahn, M., Remington, G., Gerretsen, P., & Graff-Guerrero, A. (2018). The impact of delay in clozapine initiation on treatment outcomes in patients with treatment-resistant schizophrenia: A systematic review. Psychiatry research, 268, 114–122.
Retrieved from: https://doi.org/10.1016/j.psychres.2018.06.070

8) Blackman, G., Lisshammar, J., Zafar, R., Pollak, T. A., Pritchard, M., Cullen, A. E., Rogers, J., Carter, B., Griffiths, K., Nour, M., David, A. S., McGuire, P., Stewart, R., & MacCabe, J. (2021). Clozapine Response in Schizophrenia and Hematological Changes. Journal of clinical psychopharmacology, 41(1), 19–24.
Retrieved from: https://doi.org/10.1097/JCP.0000000000001329

9) Rubio, J. M., & Kane, J. M. (2020). How and when to use clozapine. Acta psychiatrica Scandinavica, 141(3), 178–189.
Retrieved from: https://doi.org/10.1111/acps.13111
10) Every-Palmer, S., & Ellis, P. M. (2017). Clozapine-Induced Gastrointestinal Hypomotility: A 22-Year Bi-National Pharmacovigilance Study of Serious or Fatal 'Slow Gut' Reactions, and Comparison with International Drug Safety Advice. CNS drugs, 31(8), 699–709.
Retrieved from: https://doi.org/10.1007/s40263-017-0448-6

11) Leucht, S., Corves, C., Arbter, D., Engel, R. R., Li, C., & Davis, J. M. (2009). Second-generation versus first-generation antipsychotic drugs for schizophrenia: a meta-analysis. Lancet (London, England), 373(9657), 31–41.
Retrieved from: https://doi.org/10.1016/S0140-6736(08)61764-X

12) Leucht, S., Komossa, K., Rummel-Kluge, C., Corves, C., Hunger, H., Schmid, F., Asenjo Lobos, C., Schwarz, S., & Davis, J. M. (2009). A meta-analysis of head-to-head comparisons of second-generation antipsychotics in the treatment of schizophrenia. The American journal of psychiatry, 166(2), 152–163.
Retrieved from: https://doi.org/10.1176/appi.ajp.2008.08030368

13) Samara, M. T., Dold, M., Gianatsi, M., Nikolakopoulou, A., Helfer, B., Salanti, G., & Leucht, S. (2016). Efficacy, Acceptability, and Tolerability of Antipsychotics in Treatment-Resistant Schizophrenia: A Network Meta-analysis. JAMA psychiatry, 73(3), 199–210.
Retrieved from: https://doi.org/10.1001/jamapsychiatry.2015.2955

14) Wahlbeck, K., Cheine, M., Essali, A., & Adams, C. (1999). Evidence of clozapine's effectiveness in schizophrenia: a systematic review and meta-analysis of randomized trials. The American journal of psychiatry, 156(7), 990–999.
Retrieved from: https://doi.org/10.1176/ajp.156.7.990

15) Jones, P. B., Barnes, T. R., Davies, L., Dunn, G., Lloyd, H., Hayhurst, K. P., Murray, R. M., Markwick, A., & Lewis, S. W. (2006). Randomized controlled trial of the effect on Quality of Life of second- vs first-generation antipsychotic drugs in schizophrenia: Cost Utility of the Latest Antipsychotic Drugs in Schizophrenia Study (CUtLASS 1). Archives of general psychiatry, 63(10), 1079–1087.
Retrieved from: https://doi.org/10.1001/archpsyc.63.10.1079

16) Nielsen J,, Schierning O,, Taylor D. Geographical and temporal variations in clozapine prescription for schizophrenia. European Neuropsychopharmacology. 2019;22(11):818-24.
Retrieved from: https://doi.org/10/1016/j.euroneuro.2012.03.003

17) Trinczek, E., Heinzel-Gutenbrunner, M., Haberhausen, M., & Bachmann, C. J. (2016). Time to Initiation of Clozapine Treatment in Children and Adolescents with Early-Onset Schizophrenia. Pharmacopsychiatry, 49(6), 254–259.
Retrieved from: https://doi.org/10.1055/s-0042-116947

18) Wheeler A. J. (2008). Treatment pathway and patterns of clozapine prescribing for schizophrenia in New Zealand. The Annals of pharmacotherapy, 42(6), 852–860.
Retrieved from: https://doi.org/10.1345/aph.1K662

19) Üçok, A., Çikrikçili, U., Karabulut, S., Salaj, A., Öztürk, M., Tabak, Ö., & Durak, R. (2015). Delayed initiation of clozapine may be related to poor response in treatment-resistant schizophrenia. International clinical psychopharmacology, 30(5), 290–295. Retrieved from: https://doi.org/10.1097/YIC.0000000000000086

20) Robert J. Stanton, Chris Paxos, Werner J. Geldenhuys, B Pharm, Jessica L. Boss, Mark Munetz, Altaf S. Darvesh, M Pharm; Clozapine underutilization in treatment-resistant schizophrenia. Mental Health Clinician 1 March 2015; 5 (2): 63–67. doi: https://doi.org/10.9740/mhc.2015.03.063

21) Schulte, P., Bogers, J., Bond-Veerman, S., & Cohen, D. (2020). Moving forward with clozapine. Acta psychiatrica Scandinavica, 142(2), 75–77. Retrieved from: https://doi.org/10.1111/acps.13224

22) Moody, B. L., & Eatmon, C. V. (2019). Perceived Barriers and Facilitators of Clozapine Use: A National Survey of Veterans Affairs Prescribers. Federal practitioner : for the health care professionals of the VA, DoD, and PHS, 36(Suppl 6), S22–S27. Retrieved from: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6876424/

23) Farooq, S., Choudry, A., Cohen, D., Naeem, F., & Ayub, M. (2019). Barriers to using clozapine in treatment-resistant schizophrenia: systematic review. BJPsych bulletin, 43(1), 8–16.
Retrieved from: https://doi.org/10.1192/bjb.2018.67

24) Ismail, D., Tounsi, K., Zolezzi, M., & Eltorki, Y. (2019). A qualitative exploration of clozapine prescribing and monitoring practices in the Arabian Gulf countries. Asian journal of psychiatry, 39, 93–97.
Retrieved from: https://doi.org/10.1016/j.ajp.2018.12.011
25) Schizophrenia and related psychoses. In: The Maudsley Prescribing Guidelines in Psychiatry. 13th ed. Wiley Blackwell; 2018. p. 156–7. Retrieved from:https://dl.uswr.ac.ir/bitstream/Hannan/32636/1/9781119442608.pdf
26) Atkin, K., Kendall, F., Gould, D., Freeman, H., Liberman, J., & O'Sullivan, D. (1996). Neutropenia and agranulocytosis in patients receiving clozapine in the UK and Ireland. The British journal of psychiatry : the journal of mental science, 169(4), 483–488.
Retrieved from: https://doi.org/10.1192/bjp.169.4.483

27) Singh, B., Hughes, A.J. & Roerig, J.L. Comfort Level and Barriers to the Appropriate Use of Clozapine: a Preliminary Survey of US Psychiatric Residents. Acad Psychiatry 44, 53–58 (2020).
Retrieved from: https://doi.org/10.1007/s40596-019-01134-7

28) Verdoux, H., Quiles, C., Bachmann, C. J., & Siskind, D. (2018). Prescriber and institutional barriers and facilitators of clozapine use: A systematic review. Schizophrenia research, 201, 10–19.
Retrieved from: https://doi.org/10.1016/j.schres.2018.05.046
Published
2023-12-30
How to Cite
1.
Shad MU, Hasan S. BARRIERS TO CLOZAPINE USE IN TREATMENT-REFRACTORY POPULATION IN KARACHI, PAKISTAN. J Pak Psychiatr Soc [Internet]. 2023Dec.30 [cited 2024Apr.27];20(04). Available from: https://jpps.pk/index.php/journal/article/view/283