21 C.F.R. § 520.1805
Piperazine phosphate with thenium closylate tablets
(a) Specifications. Each scored tablet contains the equivalent of 250 milligrams piperazine hexahydrate (as piperazine phosphate) and 125 milligrams thenium (as thenium closylate) or 500 milligrams piperazine hexahydrate (as piperazine phosphate) and 250 milligrams thenium (as thenium closylate).
(b) Sponsor. See No. 000061 in § 510.600(c) of this chapter.
(c) Conditions of use—(1) Amount. Administer orally to dogs as follows:
| Animal weight (lb) | 375 mg | 750 mg |
|---|---|---|
| 2 but less than 5 | 1⁄2 | |
| 5 but less than 10 | 1 | 1⁄2 |
| 10 or heavier | 2 | 1 |
(2) Indications for use. For removal of immature (fourth stage larvae) and adult hookworms (Ancylostoma caninum, A. braziliense, and Uncinaria stenocephala) and ascarids (Toxocara canis) from weaned pups and adult dogs.
(3) Limitations. Federal law restricts this drug to use by or on the order of a licensed veterinarian.