an expired poison!

if poison expires does it become more poisonous or less poisonous

Expiry is not end of potency of a chemical. It’s just a time when the substance becomes less effective in its effectiveness

so according to your urgument it becomes less effective hence less poisonous?

Go ahead and take it…
We’ll be informed via 9 O’clock News or even VIUSASA…

Yes. But it may also turn into another different chemical