Use of an orally or nasally available formulation of Tretazicar for poisoning vermin. An orally available or nasally available formulation of Tretazicar, wherein in the orally available formulation the Tretazicar is protected from acid hydrolysis, and provided that the formulation is not solid Tretazicar in a gelatin capsule. A formulation of Tretazicar in which the Tretazicar is protected from acid hydrolysis, wherein the formulation is present in a liquid form. A combination of Tretazicar and bait. A method of poisoning vermin comprising making available to the vermin an orally or nasally available formulation of Tretazicar and allowing the vermin to ingest or inhale the formulation of Tretazicar.
