Dichlorvos is anthelmintic, cholinesterase inhibitor, and insecticide.
In horses dichlorvos is recommended for the removal and control of bots (Gastrophilus intestinalis, G. nasalis), large strongyles (Strongylus vulgaris, S. equinus, S. edentatus), small strongyles (of the genera Cyathostomum, Cylicocercus, Cylicodontophorus, Triodontophorus, Poteriostomum, pinworms (Oxyuris equi), and large roundworm (Parascaris equorum) in horses including ponies and mules.
Veterinary Antiparasitic Drugs
In dogs dichlorvos is used for removal of Toxocara canis and Toxascaris leonina (roundworms), Ancylostoma caninum and Uncinaria stenocephala (hookworms), and Trichuris vulpis (whipworm) residing in the gastrointestinal tract. 2
The drug is in capsule form for direct administration and in pellet form for administration in about one-third of regular dog canned food ration or in ground meat. The drug should not used in dogs weghing less than 2 pounds. In some dogs, efficacy against whipworms is inconsistent and may require re-treatment. Because this drug is also a cholinesterase inhibitor, it should not be used within a few days before or after treatment with or exposure to other cholinesterase inhibitors, pesticides or chemicals. 3
REF FILE 324-DAC