ive heard 2 different things. one that most drugs( excluding protein-based drugs like gh/hcg) retain much of their potency even a decade after expiration. a drug will lose 5% of its potency every year past expiration. your safe
I posted the same question a while back about Primobolan which had been expired about a year... all of the replies I got said that it would still be good
i had a thread about this topic a while back; the conclusion was that if the stuff was stored properly (away from excessive heat), it would still be ok to use.
I have used human grade gear that was over two years expired. It was deca. Water based should be fine as long as it wasn't opened. I take it these are not Zambons. Who makes it? I would trust UpJohn or Squibb ( or whoever they are now) and QV, as far as vet grade goes. You can always drink the winny.