Bruh, just no. Get N from A
I dont know about ant poison, but rat poisons main agent is warfarine which is a strong blood thinner, it kills rats by making them bleed out. So if you take it, not only will you suffer for a few days before finally dying, youll bleed from your ass, your ears, your eyes, you will vomit blood, you will get hemorrages under your skin, you will have a miscarriage if youre pregnant and you can even have a brain bleed and be a vegetable. Plus you need to eat like a lot (even 1 kg doesnt work sometimes) for it to work and its taste is purposefully made really bitter so there are no people trying to ingest it.
And the antidote, vitamin K injections in the ass to promote blood clotting, are really painful.
Theres also pesticides, giving you edema and lung ruptures and you drown in your own fluids which sucks too.
Its easily available for me but I gave up the idea completely