## Off topic: What is dose failure for a subling film? [Study Per­for­mance]

Dear VSP, all,

» (...) dose failure (ex., Sub-lingual Film) (...)

This caught my attention.
What is dose failure for this type of product, and how is it verified??

The subling films dissolve rapidly so I am thinking the classical mouth check with tongue depressor and penlight does not achieve much. If there's nothing to see, then it means the subject took the dose or that she/he didn't

Perhaps something else was meant?? I am a curious person so please pardon me for going a little off topic.

This week's list of things I absolutely detest: Corona virus, the which function in R, WIA-WIA interfaces for scanning under Windows 10, the Bee Gees, the smell of my fridge.

Best regards,
ElMaestro