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    Leukerin® powder 10%" containing mercaptopurine (6-MP) is an oral anticancer drug that requires careful handling. As a powder formulation, there are risks of exposure due to scattering during dispensing and possible 6-MP contamination to other drugs due to adhesion to the packaging machine. We previously reported that wiping with an alcohol-containing towel is useful for removing scattered powder after dispensing. However, it is recommended to wipe disk-type powder-packaging machines with water instead of cleaning with the alcohol-containing towel. Hence, we scattered 6-MP powder 100 mg (total amount of 6-MP: 10 mg), and then wiped with water three times using different types of cloth each time. We confirmed that third time wiping cloth did not have any 6-MP. Furthermore, we confirmed that the adhering 6-MP could be removed by wipe-cleaning (water-wiping twice and dry-wiping once) after dispensing 6-MP powder at two pharmacies that routinely dispensed 6-MP powder using a disk-type powder-packaging machine. In addition, we confirmed the adhesion of 6-MP in parts of the machine not cleaned by wipe-cleaning and also in parts that were washed only with water, in both the pharmacies. Based on the above observations, we recommend the following steps for cleaning disk-type powder-packaging machines after dispensing 6-MP powder: (1) wipe-cleaning that includes water-wiping twice and then dry-wiping once, (2) cleaning all areas of the packaging machine, and (3) wipe-cleaning with water before washing with water.


    Wakana Yoshida, Sakae Saito, Magoichi Sako, Masamitsu Noda, Satoru Kawaguchi, Kazuya Arai, Saori Anzai, Satoshi Kubota, Kiyoshi Shibuya, Mitsuru Machida, Tadao Horino, Manahito Aoki, Katsuya Otori. Two Cases at Community Pharmacies of Mercaptopurine Removal from a Disk-type Powder-packaging Machine by Wiping It with Water]. Yakugaku zasshi : Journal of the Pharmaceutical Society of Japan. 2022;142(8):893-900

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    PMID: 35908950

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