View all text of Subpart B [§ 558.55 - § 558.680]
§ 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 |
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