Would there be any issues with taking epi which was expired? Is it a hard and fast expiry date?

You will be fine. . .
hard and fast... awesome!
It could be dangerous. You better send it to me for... testing... yeah...
The real answer is it might lose a negligible amount of potency. Key word negligible this does not mean you have to double dose or anything.
kool, that dudes...i thought so
how much past the used by date do you think it would be okay? 2 years?