21 CFR § 520.1802cChapter I

§ 520.1802c Piperazine-carbon disulfide complex with phenothiazine suspension.

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Verbatim text below is from the Electronic Code of Federal Regulations (eCFR), a public-domain U.S. government work. Always verify the current version with the eCFR before relying on it for any legal matter.

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Specifications.(a) Each fluid ounce contains 5 grams of piperazine-carbon disulfide complex and 0.83 gram of phenothiazine.

Sponsor.(b) See No. 054771 in § 510.600(c) of this chapter.

Conditions of use in horses and poniesAmount.(c) —(1) Administer 1 fluid ounce per 100 pounds of body weight by stomach tube or dose syringe after withholding feed overnight or for 8 to 10 hours.

Indications for use.Parascaris equorumGastrophilusStrongylus(2) For removing ascarids (large roundworms, ), bots ( spp.), small strongyles, and large strongyles ( spp.).

Limitations.(3) Do not use in horses intended for human consumption. Federal law restricts this drug to use by or on the order of a licensed veterinarian.

[45 FR 52782, Aug. 8, 1980, as amended at 78 FR 28826, May 20, 2014]

eCFR data current as of: June 10, 2026

This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.