There should be absolutely no need to toss the eggs if you've wormed using pyrantel or one of the -zoles - if you're eating them for yourself or feeding to dogs, that is. Selling eggs is always iffy because you don't know what people are allergic to. But if you're eating them in the household, the metabolites of both of those are very mild and would be in an extremely low concentration, and anyway are used to treat people for pinworms OTC. The absolute worst you could do to yourself is a very, very mild worming (honestly you wouldn't even do that).
Piperazine (Wazine) is more iffy in my opinion; I think it's a nasty drug considering how few things it works on. If I had to choose a roundworm-only wormer I'd use pyrantel in a flat second, not piperazine. Piperazine has neurological side effects (if you've ever even slightly overdosed a kitten you know what I mean - they drool and get drunk and can even have seizures) and it's got a ridiculously long withdrawal time because it stays in the system for so long.
Based on the ridiculously thorough research I did, which agrees with what I already knew in goats and swine and dogs and cats, if you're looking to not toss the eggs and it was a "virgin" worming I'd use pyrantel first, then one of the -zoles. If they're being wormed regularly just use one of the -zoles. Ivermectin for mites only, and I would be inclined to toss eggs for a couple weeks after ivermectin because it gets into the plasma so easily and is therefore in the eggs too, and it's a bit of a harsher med than the dedicated wormers.