Expired Ivomec Eprinex pour-on

[texsuze]

Silly me, discovered I had an unopened bottle of this expensive product sitting on a shelf (indoors, out of direct light). The expiration date on the carton is April 2016. I'm not inclined to attempt using product which is now 3 years past the dead-by date.

Any opinions? Thanks!

(Note: edited from original post)

 

[Kiki]

I think I would trash it.
3 years might be a little too old.