Drug-related Problems Identified through Routine Prescription Review in Cardiovascular Outpatients: A 3-year Retrospective Study
DOI:
https://doi.org/10.64960/srimedj.v41i5.271160Keywords:
drug-related problems, cardiovascular diseases, prescription review, preventable adverse drug eventsAbstract
Background and objectives: Patients with cardiovascular diseases commonly have complex treatment regimens, which increase the risk of drug-related problems (DRPs). This study aimed to collect and describe the characteristics of DRPs identified by pharmacists in the outpatient department.
Methods: This retrospective descriptive study collected data on DRP events identified in the outpatient at the Queen Sirikit Heart Center of the Northeast between October 1, 2022 and September 30, 2025.
Results: A total of 3,777 patients with DRPs were included. Patients were male (2,017 patients; 53.4%), with a mean age of 64.1 ± 13.1 years. A total of 6,722 DRP events were identified. The most common DRP was noncompliance (1,173 events; 17.5%). The majority of DRPs were identified through routine prescription review, followed by medication reconciliation. Most DRPs severity levels were categorized as category B according to the National Coordinating Council for Medication Error Reporting and Prevention criteria. (5,119 events; 76.2%). Warfarin was the drug most commonly associated with DRPs (2,176 events; 32.4%). Most DRPs were managed in accordance with the type of problem identified.
Conclusion: Routine outpatient prescription review by pharmacists can identify DRPs, and the most common problem was noncompliance. Most DRPs severity were categorized as level B. The methods used to identify most DRPs were prescription review and medication reconciliation, respectively. The management of DRPs was consistent with the type of problem identified. Findings from this study may support the development of DRP surveillance and management processes in outpatient pharmaceutical care services.
References
Tamargo J, Kjeldsen KP, Delpón E, Semb AG, Cerbai E, Dobrev D, et al. Facing the challenge of polypharmacy when prescribing for older people with cardiovascular disease. Eur Heart J Cardiovasc Pharmacother 2022;8:406-19. doi:10.1093/ehjcvp/pvac005
World Health Organization. Medication without harm: policy brief [monograph on the Internet]. Geneva: World Health Organization; 2024 [cited Jan 20, 2026]. Available from: https://www.who.int/publications/i/item/9789240062764
World Health Organization. Medication without harm: WHO global patient safety challenge on medication safety [monograph on the Internet]. Geneva: World Health Organization; 2017 [cited Jan 20, 2026]. Available from: https://iris.who.int/server/api/core/bitstreams/15520c4f-89d1-4a8f-9bab-6b771aa30acb/content
The Pharmacy Council of Thailand. Competency standards for Thai pharmacists. Nonthaburi: The Pharmacy Council of Thailand; 2019. [cited Jan 20, 2026]. Available from: https://pharmacycouncil.org/index.php?catid=1&itemid=1433&option=content_detail&view=detail
Hanrinth R. Classification for drug related problems. Thai J Pharm Pract 2009;1(1):8-15. [cited Jan 20, 2026]. Available from: https://he01.tci-thaijo.org/index.php/TJPP/article/view/168324
National Coordinating Council for Medication Error Reporting and Prevention. NCC MERP index for categorizing medication errors. Rockville (MD): NCC MERP; 2001. [cited Jan 20, 2026]. Available from: https://www.nccmerp.org/sites/default/files/indexColor2001-06-12.pdf
Tantipiwattanasakul K. The influence of patient factors on medication adherence in ambulatory care unit at Bangplama Hospital, Suphanburi. J Health Sci 2019;28(Suppl 1):S107-19. [cited Jan 20, 2026]. Available from: https://www.thaidj.org/index.php/JHS/article/view/7916
El Hajj MS, Elmalik A, Mahmoud SF, Zahrah F, Alhaj M, Alkudsi Z, et al. Drug-related emergency department visits in Qatar: a prospective cohort study. BMC Emerg Med 2025;25:242. doi:10.1186/s12873-025-01369-8
Huiskes VJB, van den Ende CHM, Kruijtbosch M, Ensing HT, Meijs M, Meijs VMM, et al. Effectiveness of medication review on the number of drug-related problems in patients visiting the outpatient cardiology clinic: a randomized controlled trial. Br J Clin Pharmacol 2020;86:50-61. doi:10.1111/bcp.14125
Yates L, Valente M, Wadsworth C. Evaluation of pharmacist medication review service in an outpatient heart failure clinic. J Pharm Pract 2020;33(6):820-6. doi:10.1177/0897190019842696
Zavaleta-Monestel E, Martínez-Rodríguez AR, Rojas-Chinchilla C, Díaz-Madriz JP, Arguedas- Chacón S, Herrera-Solís B, et al. Improving medication safety in a Latin American hospital: examination of medication errors and the role of pharmacists. Am J Health Syst Pharm 2025;82(2): 127-34. doi:10.1093/ajhp/zxae257
Jullasattee P. The development of a drug order screening system of patients at H.R.H. the Princess Mother’s Centenary Celebrations hospital, Nakhon Ratchasima province. J Health Serv Support 2022;18(2):5-16. [cited Jan 20, 2026]. Available from: https://thaidj.org/index.php/jdhss/article/view/12470
Dechanont S, Jedsadayanmata A, Butthum B, Kongkaew C. Hospital outpatient visits associated with medication-related problems in Thailand: a multicenter prospective observational study. J Patient Saf 2021;17(1):1-7. doi:10.1097/PTS.00 00000000000367
Wasserman RL, Edrees HH, Amato MG, Seger DL, Frits ML, Hwang AY, et al. Frequency and preventability of adverse drug events in the outpatient setting. BMJ Qual Saf 2024;33(8):1-8. doi:10.1136/bmjqs-2024-017098
Tasaka Y, Tanaka A, Yasunaga D, Asakawa T, Araki H, Tanaka M. Potential drug-related problems detected by routine pharmaceutical interventions: safety and economic contributions made by hospital pharmacists in Japan. J Pharm Health Care Sci 2018;4:32. doi:10.1186/s40780-018-0125-z
Na Nongkhai K. The development of prescription screening system in outpatients pharmacy services Nongkhai Hospital at Nongkhai Province. Res Dev Health Syst J 2025;18(2):1-13. doi:10.14456/ijps.2021.15
Mekonnen AB, McLachlan AJ, Brien JAE. Effectiveness of pharmacist-led medication reconciliation programmes on clinical outcomes at hospital transitions: a systematic review and meta-analysis. BMJ Open 2016;6(2):e010003. doi:10.1136/bmjop-en-2015-010003
Altowaijri A, Phillips CJ, Fitzsimmons D. A systematic review of the clinical and economic effectiveness of clinical pharmacist intervention in secondary prevention of cardiovascular disease. J Manag Care Pharm 2013;19(5):408-16. doi:10.18553/jmcp.2013. 19.5.408
Al-Taani GM, Muflih SM, Al-Azzam SI, Alzoubi KH. Costs saved and avoided from pharmacist interventions to address drug-related problems identified from outpatient clinics in Jordan. PLoS One 2024;19(6):e0302287. doi:10.1371/journal.pone.0302287
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