Table 1.

A description of each pop-up alert and corresponding frequency throughout the investigated sample

Pop-up message (colour)	Frequency as a percentage of serialised products entered into the study (n=2188)
Authenticated (purple symbol requiring no action)	96%
Already authenticated here (amber)	Naturally occurring*
Authenticated elsewhere/falsified (amber)	1%
Product recalled (red)	1%
Pack recalled (red)	1%
Pack expired (red)	1%

*If a medicine were scanned twice, the second scan would generate a pop-up which stated that the medicine was ‘Already authenticated here'. Therefore, these alerts were ‘Naturally occurring’ and not introduced by the principal investigator.