Can multiple medications be crushed in the same pouch-together?

There are various opinions about crushing more than one medication at a time. Different pharmacists require only 1 medication to be crushed at a time. Other pharmacists approve crushing a collection of meds at a time. There doesn't seem to be standard guidance from the pharmacy world.

The PP06 pouch can hold 50ml of liquid. We have tested 8 pills in one crushing and with enough crushing and rolling to pulverize medications into fine dust, it has been effective handling 8 different medications.

As of 2/28/2022 every pharmacist surveyed from among RxCrush customers, recommends that only one medication be crushed in a dose. That may include several pills of the same medication but not a mix of different medications.

There is guidance about crushing medications and avoiding errors that can be uncomfortable for the patient and healthcare workers. This article by Matthew Grissinger, RPh, FASCP as published in P&T. 2013 Oct; 38(10): 575-576 recommends best practices for the administration of crushed medications. The article specifically recommends crushing one medication at a time. Footnotes at the end of the article point to literature with detailed descriptions of medications that shouldn't be crushed and medications that shouldn't be mixed.
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