*: -drug amount in IU

Our analysis revealed that doxorubicin (37.4%) had the highest amount of drug wastage, followed by cytarabine (35%) and L-asparaginase (26.9%), which were prescribed for acute lymphocytic leukaemia.

For infrequently prescribed drugs, single administrations of irinotecan for primitive neuroectodermal tumours and fludarabine for acute myeloid leukaemia resulted in 85% and 68% of drug wastage, respectively. However, no drug wastage was observed for bortezomib, carboplatin, dactinomycin, and ifosfamide, as shown in Table 3 .