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Sustainability initiative: dose banding of paclitaxel to minimise drug waste

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European Statement

Production and Compounding

Author(s)

Peder Nygard, Helle-Brit Fiebrich-Westra, Elise Smolders

Why was it done?

The aim of this project was to reduce paclitaxel waste caused by cancellation of administrations. Standardised dose bands make interchangeability of already reconstituted paclitaxel bags easier, as more patients use the same dose. This could potentially save drug- and material waste and costs even as manpower.

What was done?

Paclitaxel fixed dose bands were created for patients treated with a weekly dose of 80 mg/m2.

How was it done?

In consultation with prescribers the dose bands for paclitaxel where created (see table). These dosages were implemented as a dose-rounding rules in the drug preparation software (Hix 6.2, ChipSoft BV). The maximum deviation for dose-rounding rules for paclitaxel in our hospital is 10% of the prescribed dose. Dosage ≤72mg or >200mg were rounded as normal.

Prescribed dose (mg) Dose-band (mg) m2 (dose 80 mg/m2
>72 ≤88 78 1.0
>88 ≤102 96 1.2
>102 ≤116 114 1.4
>116 ≤136 126 1.6
>136 ≤152 144 1.8
>152 ≤168 162 2.0
>168 ≤184 174 2.2
>184 ≤200 192 2.4

What has been achieved?

These rules were implemented in April 2022. Data from 1 May 2022 to 31 August 2022 is compared with the same time period in 2021. In 2022, a total of 729 infusions where prepared compared with 872 infusions in 2021.
In this 4 month time period in 2022 a total of 14 different dosages were prescribed, compared with 24 in the same time period in 2021. Additionally, interchangeability was improved as the top 3 dosages prepared by the pharmacy were: 144 mg (36%), 162 mg (22%), and 126 mg (19%) compared with 144 mg (17%), 138 mg (14%), and 126 mg (10%) in 2021.
Furthermore, in 2021 we discarded 33 prepared dosages of paclitaxel of which three infusions could be reused. Compared to 13 discarded dosages in 2022 of which eight were reused giving a reduction of 25 infusions less waste (83% reduction, savings ~2500 euros).

What next?

Pharmacists need to be instructed to adapt these rounding rules, which must decrease the variation in dosages and thus waste. Secondly, this project will be monitored the upcoming year and evaluated together with prescribers. The aim is to implement dose bands for paclitaxel dosages 175 mg/m2 and other chemotherapeutic drugs (eg, oxaliplatin, docetaxel, cyclophosphamide).

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