PMID- 37797822 OWN - NLM STAT- MEDLINE DCOM- 20240122 LR - 20240201 IS - 1437-7780 (Electronic) IS - 1341-321X (Linking) VI - 30 IP - 2 DP - 2024 Feb TI - Sulfamethoxazole-trimethoprim for pneumocystis pneumonia prophylaxis, causes of discontinuation and thrombocytopenia observed during administration: A single-center retrospective study. PG - 141-146 LID - S1341-321X(23)00240-4 [pii] LID - 10.1016/j.jiac.2023.09.030 [doi] AB - INTRODUCTION: The development of pneumocystis pneumonia (PCP) has recently become a growing concern; thus, its prevention has become increasingly important. Sulfamethoxazole-trimethoprim (ST) is a cost-effective first-line and prophylactic treatment for PCP. However, ST administration criteria for PCP prophylaxis remain unclear and are often discontinued because of adverse events (AEs). In this study, we aimed to investigate the causes of ST discontinuation and the associated AEs using objective data. METHODS: We retrospectively analyzed the data of 162 patients admitted to Kansai Medical University Hospital between January 2018 and December 2020, who received ST for PCP prophylaxis. We compared clinical characteristics, laboratory data, and incidence of AEs between ST non-discontinuation and ST discontinuation groups. Additionally, we divided the patients into non-developing and developing thrombocytopenia (>/= Grade 1) groups based on the investigation results. RESULTS: No patients developed PCP while receiving ST. The most common causes of ST discontinuation were thrombocytopenia (37%), liver dysfunction (20%), and rash (18%). Multivariate analysis revealed thrombocytopenia (>/= Grade 1) as a factor significantly associated with ST discontinuation. Furthermore, we identified three factors correlated with thrombocytopenia (>/= Grade 1): age >/=50 years, lymphocyte count <1000/muL, and platelet count <180,000/muL. CONCLUSIONS: Patients with the aforementioned factors are at higher risk of developing thrombocytopenia (>/= Grade 1) during ST administration for PCP prophylaxis. Therefore, platelet count monitoring is essential to enhance safety and efficacy of ST treatment. Nonetheless, further research is warranted to explore additional implications and interventions. CI - Copyright (c) 2023 Japanese Society of Chemotherapy, Japanese Association for Infectious Diseases, and Japanese Society for Infection Prevention and Control. Published by Elsevier Ltd. All rights reserved. FAU - Hashimoto, Misaki AU - Hashimoto M AD - Department of Pharmacy, Kansai Medical University Hospital, Osaka, Japan. Electronic address: ky051124519@gmail.com. FAU - Hiraiwa, Miho AU - Hiraiwa M AD - Department of Pharmacy, Kansai Medical University Hospital, Osaka, Japan. FAU - Uchitani, Kazuki AU - Uchitani K AD - Department of Pharmacy, Kansai Medical University Hospital, Osaka, Japan. FAU - Ueda, Masahiro AU - Ueda M AD - Faculty of Pharmaceutical Sciences, Setsunan University, Osaka, Japan. FAU - Tanaka, Masayuki AU - Tanaka M AD - Faculty of Pharmaceutical Sciences, Setsunan University, Osaka, Japan. FAU - Nishiyama, Norito AU - Nishiyama N AD - Department of Pharmacy, Kansai Medical University Hospital, Osaka, Japan; Department of Infection Control, Kansai Medical University Hospital, Osaka, Japan. FAU - Miyashita, Naoyuki AU - Miyashita N AD - Department of Infection Control, Kansai Medical University Hospital, Osaka, Japan. LA - eng PT - Journal Article DEP - 20231004 PL - Netherlands TA - J Infect Chemother JT - Journal of infection and chemotherapy : official journal of the Japan Society of Chemotherapy JID - 9608375 RN - 8064-90-2 (Trimethoprim, Sulfamethoxazole Drug Combination) SB - IM MH - Humans MH - Middle Aged MH - Retrospective Studies MH - *Pneumonia, Pneumocystis/epidemiology/prevention & control/drug therapy MH - Trimethoprim, Sulfamethoxazole Drug Combination/adverse effects MH - *Thrombocytopenia/drug therapy OTO - NOTNLM OT - Adverse event OT - Pneumocystis pneumonia OT - Sulfamethoxazole-trimethoprim OT - Thrombocytopenia COIS- Declaration of competing interest None. EDAT- 2023/10/06 00:43 MHDA- 2024/01/22 06:42 CRDT- 2023/10/05 19:33 PHST- 2023/07/03 00:00 [received] PHST- 2023/09/26 00:00 [revised] PHST- 2023/09/30 00:00 [accepted] PHST- 2024/01/22 06:42 [medline] PHST- 2023/10/06 00:43 [pubmed] PHST- 2023/10/05 19:33 [entrez] AID - S1341-321X(23)00240-4 [pii] AID - 10.1016/j.jiac.2023.09.030 [doi] PST - ppublish SO - J Infect Chemother. 2024 Feb;30(2):141-146. doi: 10.1016/j.jiac.2023.09.030. Epub 2023 Oct 4.