[Code of Federal Regulations]
[Title 21, Volume 6]
[Revised as of January 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 21CFR558.254]

[Page 405-406]
 
                        TITLE 21--FOOD AND DRUGS
 
CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN 
                          SERVICES (CONTINUED)
 
PART 558--NEW ANIMAL DRUGS FOR USE IN ANIMAL FEEDS--Table of Contents
 
      Subpart B--Specific New Animal Drugs for Use in Animal Feeds
 
Sec.  558.254  Famphur.

    (a) Approvals. Type A medicated articles: 13.2 and 33.3 percent to 
000061 in Sec.  510.600(c) of this chapter.
    (b) 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.
    (c) Related tolerances. See Sec.  556.273 of this chapter.
    (d) Conditions of use. It is used in the feed for cattle as follows:
    (1) Amount. 1.1 milligrams per pound body weight per day.
    (i) Indications for use. For control of grubs and as an aid in 
control of sucking lice.
    (ii) Limitations. For beef cattle and nonlactating dairy cows; feed 
for 30

[[Page 406]]

days; withdraw from dry dairy cows and heifers 21 days prior to 
freshening; withdraw 4 days prior to slaughter.
    (2) Amount. 2.3 milligrams per pound body weight per day.
    (i) Indications for use. For control of grubs.
    (ii) Limitations. For beef cattle and nonlactating dairy cows; feed 
for 10 days; withdraw from dry dairy cows and heifers 21 days prior to 
freshening; withdraw 4 days prior to slaughter.

[41 FR 11000, Mar. 15, 1976, as amended at 51 FR 7397, Mar. 3, 1986; 57 
FR 7652, Mar. 4, 1992; 62 FR 55161, Oct. 23, 1997; 62 FR 61626, Nov. 19, 
1997]