You are talking about totally different things here, your statement makes no sense to me you keep the wormer away from children so they don't drink it, however Fenbendazole has been used to treat worms in humans i believe
Structurally, CORID mimics thiamine (Vitamin B1) which is required by coccidia for normal growth and reproduction. When coccidia ingest CORID, they experience thiamine deficiency and starve from malnutrition. CORID has been experimentally administered at many times the recommended dosage and duration with no signs of toxicity
My point is that just because a label says 'Keep away from children' does not make it a bad thing, it just needs to be used with proper safeguards. The same as with Tek-trol, it is very safe and beneficial when handled properly.