Shelf life of unopened N

[Cya89]

Anyone know the actual real shelf life of unopened N? As in, would it still be effective say 5-10 years after the listed expiry date? Been reading the below article:

Drug Expiration Dates — Do They Mean Anything? - Harvard Health

Are expired drugs safe and does the medicine expiration date really matter?...

www.health.harvard.edu

I guess if there's anyone here that might have a science background, they might now.

 

[calendulo]

Data expiration for unopened N. One year left, ok...............two, maybe....three or more years left, I do not know. That is not paracetamol or aspirins though.
Report is talking about pills. Are excluded liquid antibiotics.
N is an injectable sodium solution.
If it was powder keeping it into a closed recipient and in a spot dry and cool.