To OP:
Keep in mind that all egg withdrawals are merely to avoid residue in the eggs should they ever be on the market...ie someone outside your family buys or is given the eggs.
Most drug residues are minuscule in the eggs. Many of the drugs (both ivermectin and prazqiquental) are used in humans at far greater amounts to eradicate worms.
The only purpose of any withdrawal is so that should someone become sick, and residue be found in your egg, the federal government could take action for illicit use. However, for the small holder, there are no egg police checking your eggs for residues (the large factories must comply to that kind of testing).
The lifetime withdrawal has nothing to do with any kind of safety but only with legality that those drugs have not been approved for that food animal. Casportpony is correct that it is totally bogus.
If your family alone eats the eggs, then you have the option of a personal choice in the matter. Is anyone especially sensitive to drugs, in particular the drugs you are using?
That's the only real question if you are not selling to the public or gifting eggs to friends.
I've read a study that ivermectin is at its greatest extent 5 days after administration in chickens then tapers off in their system. So in about a week, it is not found in the eggs.
14 day withdrawal is the general rule of thumb for residue if actual drug residue is a concern.
I've eaten Ivermectin eggs within a week and my family and I have lived to tell about it.
LofMc
