著者

中本 恵理 川上 和宜 今田 洋司 式部 さあ里 杉田 一男 篠崎 英司 末永 光邦 松阪 諭 水沼 信之 濱 敏弘

出版者

一般社団法人日本医療薬学会

雑誌

医療薬学 (ISSN:1346342X)

巻号頁・発行日

vol.37, no.7, pp.403-409, 2011 (Released:2012-08-30)

参考文献数

16

被引用文献数

1 3

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Cetuximab, a therapeutic agent for metastatic colorectal cancer, is a chimeric monoclonal antibody that binds and inhibits the epidermal growth factor receptor (EGFR). Adverse events associated with cetuximab include skin disorders, which occur at a high incidence, infusion reactions, and electrolyte disorders, such as hypomagnesemia. The incidence and time of onset of hypomagnesemia following the start of cetuximab treatment were investigated retrospectively. The efficacy of oral magnesium preparations in preventing hypomagnesemia was also examined.At The Cancer Institute Hospital of Japanese Foundation For Cancer Research, the incidence of hypomagnesemia in patients treated with cetuximab was 39.3%. However, there was no clear trend in the time of onset. In addition, there was no difference in the incidence of hypomagnesemia as a function of whether oral magnesium preparations were administered (p=0.097). Some patients developed severe hypomagnesemia and an intravenous magnesium preparation was not very effective in bringing about recovery, necessitating discontinuation of cetuximab therapy.Mild hypomagnesemia may be overlooked because subjective symptoms are not readily apparent. However, if it worsens, hypomagnesemia may lead to serious adverse events, such as arrhythmias, which would require discontinuation of cetuximab treatment. In pa tients receiving cetuximab, therefore, serum magnesium levels must be monitored regularly since early detection and treatment of hypomagnesemia are very important.

著者

木村 優花 川上 和宜 中村 匡志 横川 貴志 清水 久範 小林 一男 青山 剛 鈴木 亘 羽鳥 正浩 鈴木 賢一 高張 大亮 小倉 真理子 陳 勁松 中山 厳馬 若槻 尊 山口 研成 山口 正和

出版者

公益社団法人 日本薬学会

雑誌

YAKUGAKU ZASSHI (ISSN:00316903)

巻号頁・発行日

vol.143, no.12, pp.1075-1081, 2023-12-01 (Released:2023-12-01)

参考文献数

21

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Since it is important that patients take their oral anticancer therapy as prescribed, pharmacists need to assess adherence. In addition, oral anticancer drugs are expensive, and reuse of leftover drugs at outpatient pharmacy clinics is useful in reducing drug costs. The present study aimed to clarify when and why patients have leftover capecitabine tablets, and the cost of leftover capecitabine tablets reused at an outpatient pharmacy clinic, focusing on adjuvant capecitabine plus oxaliplatin (CAPOX) chemotherapy for gastric cancer. We retrospectively studied patients who received adjuvant CAPOX chemotherapy for gastric cancer between November 1, 2015, and April 30, 2021, at the Cancer Institute Hospital of the Japanese Foundation for Cancer Research. The cost of leftover capecitabine reused by pharmacists was calculated based on the National Health Insurance drug price standard for the study period. This study included 64 patients who received adjuvant CAPOX chemotherapy. Thirty-seven patients had 152 leftover capecitabine tablets. The most common reasons for leftover capecitabine tablets were nausea and vomiting (21.7%), missed doses (18.4%), and diarrhea (13.2%). The leftover capecitabine tablets for 25 patients were reused at the outpatient pharmacy clinic at a cost of JPY 604142.8 (JPY 24165.7 per patient). The study results suggest that evaluating capecitabine adherence and the reasons for leftover capecitabine tablets at outpatient pharmacy clinics as well as reusing leftover medication can contribute to reducing drug costs.