Section 520.2473b - Tioxidazole paste(a)Specifications. Each plastic syringe contains 6.25 grams of tioxidazole.(b)Sponsor. See No. 000061 in § 510.600(c) of this chapter.(c)Conditions of use - (1)Horses - (i)Amount. 5 milligrams of tioxidazole per pound of body weight as a single dose.(ii)Indications for use. Removal of mature large strongyles (Strongylus edentatus, S. equinus, and S. vulgaris), mature ascarids (Parascaris equorum), mature and immature (4th larval stage) pinworms (Oxyuris equi), and mature small strongyles (Triodontophorus spp.).(iii)Limitations. Administer orally by inserting the nozzle of the syringe through the space between front and back teeth and deposit the required dose on the base of the tongue. Before dosing, make sure the horse's mouth contains no feed. Not for use in horses intended for food. The reproductive safety of tioxidazole in breeding animals has not been determined. Consult your veterinarian for assistance in the diagnosis, treatment, and control of parasitism. It is recommended that this drug be administered with caution to sick or debilitated horses.52 FR 43059, Nov. 9, 1987