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Code of Federal Regulations (Last Updated: July 5, 2024) |
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Title 21 - Food and Drugs |
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Chapter I - Food and Drug Administration, Department of Health and Human Services |
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SubChapter E - Animal Drugs, Feeds, and Related Products |
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Part 558 - New Animal Drugs for Use in Animal Feeds |
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Subpart B - Specific New Animal Drugs for Use in Animal Feeds |
§ 558.254 - Famphur.
Latest version.
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§ 558.254 Famphur.
(a) Specifications. Type A medicated articles containing 13.2 or 33.3 percent famphur.
(b) Sponsor. See No. 000061 in § 510.600(c) of this chapter.
(c) Related tolerances. See § 556.273 of this chapter.
(d) Special considerations. Famphur is a cholinesterase inhibitor. Do not use this product in animals simultaneously or within a few days before or after treatment with or exposure to cholinesterase-inhibiting drugs, pesticides, or chemicals.
(e) Conditions of use. It is used in cattle feed as follows:
Famphur amount Indications for use Limitations Sponsor (1) To provide 1.1 milligrams per pound (mg/lb) body weight per day Beef cattle and nonlactating dairy cattle: For control of grubs and as an aid in control of sucking lice Feed for 30 days. Withdraw from dry dairy cows and heifers 21 days prior to freshening. Withdraw 4 days prior to slaughter 000061 (2) To provide 2.3 mg/lb body weight per day Beef cattle and nonlactating dairy cattle: For control of grubs Feed for 10 days. Withdraw from dry dairy cows and heifers 21 days prior to freshening. Withdraw 4 days prior to slaughter 000061 [84 FR 39185, Aug. 9, 2019, as amended at 87 FR 1097117947, FebMar. 2829, 2022]