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Yikes, I hope I did not give the impression I was implying that someone should use Elector PSP internally! :sick I meant to say Spinosad (the active ingredient in Elector) is sometimes taken internally (different formulations intended and manufactured for that use specifically , by...

Elector PSP does not have an egg withdrawl period. Even taken orally it's for external parasites (ie; fleas on dogs, lice etc), not for internal parasites. So I assume it's just not effective for them. Different kinds of parasites require different chemicals. What works for roundworm doesn't...