21 C.F.R. § 558.254

Current through November 30, 2024

Section 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

21 C.F.R. §558.254

84 FR 39185 , Aug. 9, 2019, as amended at 87 FR 17947 , Mar. 29, 2022

84 FR 39185 , 8/9/2019; as amended at 87 FR 10971 , 2/28/2022; as amended at 87 FR 17947 , 3/29/2022