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U.S. Department of Health and Human Services

CFR - Code of Federal Regulations Title 21

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The information on this page is current as of April 1 2020.

For the most up-to-date version of CFR Title 21, go to the Electronic Code of Federal Regulations (eCFR).

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Help | More About 21CFR
[Code of Federal Regulations]
[Title 21, Volume 6]
[Revised as of April 1, 2020]
[CITE: 21CFR558.311]



TITLE 21--FOOD AND DRUGS
CHAPTER I--FOOD AND DRUG ADMINISTRATION
DEPARTMENT OF HEALTH AND HUMAN SERVICES
SUBCHAPTER E - ANIMAL DRUGS, FEEDS, AND RELATED PRODUCTS

PART 558 -- NEW ANIMAL DRUGS FOR USE IN ANIMAL FEEDS

Subpart B - Specific New Animal Drugs for Use in Animal Feeds

Sec. 558.311 Lasalocid.

(a) Specifications. A minimum of 90 percent of lasalocid activity is derived from lasalocid A.

(b) Approvals. Type A medicated articles approved for sponsors identified in § 510.600(c) of this chapter for use as in paragraph (e) of this section as follows:

(1) 3.0, 3.3, 3.8, 4.0, 4.3, 4.4, 5.0, 5.1, 5.5, 5.7, 6.0, 6.3, 6.7, 7.2, 7.5, 8.0, 8.3, 10.0, 12.5, 15, 20, and 50 percent activity to No. 054771 for use as in paragraphs (e)(1) (i), (ii), (iii), (iv), and (x) of this section.

(2) 15 percent activity to No. 066104 as provided by No. 054771 for use as in paragraph (e)(1)(v) of this section.

(3) 15, 20, 33.1, and 50 percent activity to No. 054771 for use in cattle feeds as in paragraphs (e)(1)(vi), (vii), (ix), (xi), (xii), and (xv) of this section, and for use in sheep as in paragraph (e)(1)(viii) of this section.

(4) 15 percent activity to No. 054771 for use in Type C rabbit feeds as in paragraph (e)(1)(xvi) of this section and for use in ruminant free-choice Type C feeds as in paragraphs (e)(2), (e)(3), and (e)(4) of this section.

(5) 15 and 20 percent activity to Nos. 012286 and 017800 for use in free-choice mineral feeds for cattle as in paragraph (e)(1)(xviii) of this section.

(6) 20 percent activity as a liquid Type A article to No. 054771 for use in cattle feeds as in paragraphs (e)(1)(vi), (e)(1)(vii), (e)(1)(ix), (e)(1)(xi), (e)(1)(xii), and (e)(3) of this section, and for use in sheep feeds as in paragraph (e)(1)(viii) of this section.

(7) 20 percent activity to No. 054771 for use as follows:

(i) Chukar partridges as in paragraph (e)(1)(xiii).

(ii) Turkeys as in paragraph (e)(1)(xiv).

(iii) Rabbits as in paragraph (e)(1)(xvi).

(8) [Reserved]

(9) 15 percent activity to No. 067949 for use in free-choice protein blocks for cattle as in paragraphs (e)(1)(xix) of this section.

(c) Related tolerance. See § 556.347 of this chapter.

(d) Special considerations. (1) Type C cattle and sheep feeds may be manufactured from lasalocid liquid Type B feeds which have a pH of 4.0 to 8.0 and bear appropriate mixing directions as follows:

(i) For liquid feeds stored in recirculating tank systems: Recirculate immediately prior to use for no less than 10 minutes, moving not less than 1 percent of the tank contents per minute from the bottom of the tank to the top. Recirculate daily as described even when not used.

(ii) For liquid feeds stored in mechanical, air, or other agitation-type tank systems: Agitate immediately prior to use for not less than 10 minutes, creating a turbulence at the bottom of the tank that is visible at the top. Agitate daily as described even when not used.

(2) A physically stable lasalocid liquid feed will not be subject to the requirements for mixing directions prescribed in paragraph (d)(1) of this section provided it has a pH of 4.0 to 8.0 and contains a suspending agent(s) sufficient to maintain a viscosity of not less than 300 centipoises per second for 3 months.

(3) If a manufacturer is unable to meet the requirements of paragraph (d)(1) or (d)(2) of this section, the manufacturer may secure approval of a positionally stable liquid feed by:

(i) Either filing a new animal drug application for the product or establishing a master file containing data to support the stability of its product;

(ii) Authorizing the agency to reference and rely upon the data in the master file to support approval of a supplemental new animal drug application to establish physical stability; and

(iii) Requesting the sponsor of an approved new animal drug application to file a supplement to provide for use of its lasalocid Type A article in the manufacture of the liquid feed specified in the appropriate master file. If the data demonstrate the stability of the liquid feed described in the master file, the supplemental new animal drug application will be approved. The approval will provide a basis for the individual liquid feed manufacturer to manufacture under a medicated feed license the liquid mediated feed described in the master file. A manufacturer who seeks to market a physically unstable lasalocid liquid feed with mixing directions different from the standard directions established in paragraph (d)(1) of this section may also follow this procedure.

(4) If adequate information is submitted to show that a particular liquid feed containing lasalocid is stable outside the pH of 4.0 to 8.0, the pH restriction described in paragraphs (d)(1) and (d)(2) of this section may be waived.

(5) Required label statements:

(i) For liquid Type B feed (cattle and sheep): Mix thoroughly with grain and/or roughage prior to feeding. Feeding undiluted, mixing errors, or inadequate mixing (recirculation or agitation) may result in an excess lasalocid concentration which could be fatal to cattle and sheep. Do not allow horses or other equines access to Type A articles or Type B feeds containing lasalocid as ingestion may be fatal. Safety of lasalocid for use in unapproved species has not been established.

(ii) For Type A articles or Type B feeds (cattle and sheep): Feeding undiluted or mixing errors may result in an excess lasalocid concentration which could be fatal to cattle and sheep. Do not allow horses or other equines access to Type A articles or Type B feeds containing lasalocid as ingestion may be fatal. Safety of lasalocid for use in unapproved species has not been established.

(iii) For Type A articles, Type B or Type C feeds (cattle): A withdrawal period has not been established for this product in preruminating calves. Do not use in calves to be processed for veal.

(6) Lasalocid Type A medicated articles containing lasalocid dried fermentation residue are for use in cattle and sheep feed only.

(7) Each use in a free-choice Type C cattle feed as in paragraphs (e)(1)(xii) and (e)(1)(xviii) of this section must be the subject of an approved NADA or supplemental NADA as provided in § 510.455 of this chapter.

(e)(1) Conditions of use. It is used as follows:

Lasalocid sodium activity in grams per ton Combination in grams per ton Indications for use Limitations Sponsor
(i) 68 (0.0075 pct) to 113 (0.0125 pct)For the prevention of coccidiosis caused by Eimeria tenella, E. necatrix, E. acervulina, E. brunetti, E. mivati, and E. maximaFor broiler or fryer chickens only; feed continuously as the sole ration054771
(ii) 68 (0.0075 pct) to 113 (0.0125 pct)Bambermycins 1 to 2Broiler chickens: For prevention of coccidiosis caused by Eimeria tenella, E. necatrix, E. acervulina, E. brunetti, E. mivati, and E. maxima; and for increased rate of weight gain and improved feed efficiency.Feed continuously as sole ration. Bambermycins provided by No. 016592 in § 510.600(c) of this chapter.016592
(iii) [Reserved]
(iv) 68 (0.0075 percent)Bacitracin 10 to 50For prevention of coccidiosis caused by Eimeria tenella, E. necatrix, E. acervulina, E. brunetti, E. mivati, and E. maxima, and for increased rate of weight gain and improved feed efficiencyFor broiler or fryer chickens only; feed continuously as the sole ration; bacitracin methylenedisalicylate provided by No. 054771 in § 510.600(c) of this chapter054771
(v) [Reserved]
(vi) 10 (0.0011 pct) to 30 (0.0033 pct)Cattle; for improved feed efficiencyIn Type C feeds; for cattle fed in confinement for slaughter only; feed continuously in complete feed to provide not less than 100 mg nor more than 360 mg of lasalocid sodium activity per head per day054771
(vii) 25 (0.0027 pct) to 30 (0.0033 pct)Cattle; for improved feed efficiency and increased rate of weight gainIn Type C feeds; for cattle fed in confinement for slaughter only; feed continuously in complete feed to provide not less than 250 mg nor more than 360 mg of lasalocid sodium activity per head per day054771
(viii) 20 (0.0022 pct) to 30 (0.0033 pct)Sheep; for the prevention of coccidiosis caused by Eimeria ovina, E. crandallis, E. ovinoidalis (E. ninakohlyakimovae), E. parva, and E. intricataIn Type C feeds; for sheep maintained in confinement; feed continuously in complete feed to provide not less than 15 mg nor more than 70 mg of lasalocid sodium activity per head per day depending on body weight054771
(ix)Pasture cattle (slaughter, stocker, feeder cattle, and dairy and beef replacement heifers): for increased rate of weight gain. Intakes of lasalocid in excess of 200 mg/head/day have not been shown to be more effective than 200 mg/head/day.Feed continuously at a rate of not less than 60 mg or more than 300 mg of lasalocid per head per day when on pasture; the drug must be contained in at least 1 pound of feed.054771
(x) 68 (0.0075 pct) to 113 (0.0125 pct)Bacitracin 4 to 50Broiler chickens; for prevention of coccidiosis caused by Eimeria tenella, E. necatrix, E. acervulina, E. brunetti, E. mivati, and E. maxima; and for improved feed efficiencyFor broiler chickens only; feed continuously as the sole ration; bacitracin methylenedisalicylate provided by No. 054771 in § 510.600(c) of this chapter054771
(xi) 68 (0.0075 pct) to 113 (0.0125 pct)Bacitracin zinc 4 to 50Broiler chickens. For prevention of coccidiosis caused by Eimeria tenella, E. necatrix, E. acervulina, E. brunetti, E. mivati, and E. maxima, and for increased rate of weight gain and improved feed efficiency.Feed continuously as sole ration. Bacitracin zinc and lasalocid sodium as provided by No. 054771 in § 510.600(c) of this chapter.054771
(xii)Pasture cattle (slaughter, stocker, feeder cattle, and dairy and beef replacement heifers): For increased rate of weight gain. Intakes of lasalocid in excess of 200 mg/head/day have not been shown to be more effective than 200 mg/head/day.Feed continuously on a free-choice basis at a rate of not less than 60 mg or more than 300 mg of lasalocid per head per day.054771
(xiii)Cattle; for control of coccidiosis caused by Eimeria bovis and Eimeria zuerniiFor cattle; hand feed at a rate of 1 mg of lasalocid per 2.2 pounds body weight per day to cattle weighing up to 800 pounds with a maximum of 360 mg of lasalocid per head per day054771
(xiv) 113 (0.0125 pct)Chukar partridges; for prevention of coccidiosis caused by Eimeria legionensisFeed continuously as sole ration up to 8 weeks of age054771
(xv) 68 (0.0075 pct) to 113 (0.0125 pct) Growing turkeys; for prevention of coccidiosis caused by E. meleagrimitis, E. gallopavonis, and E. adenoeides.Feed continuously as sole ration054771
Bacitracin 4 to 50Growing turkeys; for prevention of coccidiosis caused by E. meleagrimitis, E. gallopavonis, and E. adenoeides; for increased rate of weight gain and improved feed efficiency.Feed continuously as sole ration054771
Bacitracin methylenedisalicylate 4 to 50Growing turkeys; for prevention of coccidiosis caused by E. meleagrimitis, E. gallopavonis, and E. adenoeides; for increased rate of weight gain and improved feed efficiency.Feed continuously as sole ration. Bacitracin methylenedisalicylate as provided by No. 054771 in § 510.600(c) of this chapter.054771
(xvi)Replacement calves; for control of coccidiosis caused by E. bovis and E. zuernii.In milk replacer powder; hand feed at a rate of 1 mg of lasalocid per 2.2 lb body weight per day; include on labeling warning: "A withdrawal period has not been established for lasalocid in pre-ruminating calves. Do not use in calves to be processed for veal"054771
(xvii) 113 (0.0125 pct)Rabbits; for prevention of coccidiosis caused by Eimeria stiedaeFeed continuously as sole ration up to 6 1/2 weeks of age054771
(xviii) 1440Pasture cattle (slaughter, stocker, feeder cattle, and dairy and beef replacement heifers): For increased rate of weight gain.Feed continuously on a free-choice basis at a rate of not less than 60 mg nor more than 200 mg of lasalocid per head per day.021930
017800
(xix) 300Pasture cattle (slaughter, stocker, feeder cattle, and dairy and beef replacement heifers): for increased rate of weight gain.Feed continuously on a free-choice basis at a rate of not less than 60 mg nor more than 200 mg of lasalocid per head per day.067949
(xx)-(xxviii) [Reserved]

(2) It is used as a free-choice mineral Type C feed as follows:

(i) Specifications.

Ingredient Percent International feed No.
Defluorinated phosphate (20.5% Ca, 18.5% P)35.96-01-080
Sodium chloride (salt)20.06-04-152
Calcium carbonate (38% Ca)18.06-01-069
Cottonseed meal10.05-01-621
Potassium chloride3.06-03-755
Selenium premix (0.02 percent Se) 13.0
Dried cane molasses (46% sugars)2.54-04-695
Magnesium sulfate1.76-02-758
Vitamin premix 11.4
Magnesium oxide (58% Mg)1.26-02-756
Potassium sulfate1.26-06-098
Trace mineral premix 11.04
Lasalocid Type A medicated article (68 g/lb) 21.06

1 Content of the vitamin and trace mineral premixes may be varied; however, they should be comparable to those used by the firm for other free-choice feeds. Formulation modifications require FDA approval prior to marketing. Selenium must comply with 21 CFR 573.920. Ethylenediamine dihydroiodide (EDDI) should comply with FDA Compliance Policy Guides Sec. 651.100 (CPG 7125.18).

2 To provide 1,440 g lasalocid per ton, use 21.2 lbs (1.06%) of a lasalocid Type A medicated article containing 68 g/lb. If using a lasalocid Type A medicated article containing 90.7 g/lb, use 15.88 lbs per ton (0.794%), adding molasses.

(ii) Amount. 1,440 grams per ton.

(iii) Indications for use. Pasture cattle (slaughter, stocker, feeder cattle, and dairy and beef replacement heifers): for increased rate of weight gain. Intakes of lasalocid in excess of 200 mg/head/day have not been shown to be more effective than 200 mg/head/day.

(iv) Limitations. For pasture cattle (slaughter, stocker, feeder cattle, and dairy and beef replacement heifers); feed continuously on a free-choice basis at a rate of 60 to 300 milligrams lasalocid per head per day.

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

(3) It is used as a ruminant free-choice liquid Type C feed as follows:

(i) Specifications.

Ingredient Percent International feed No.
Cane molasses55.1674-13-241
Condensed molasses fermentation solubles24.0
50% Urea Solution (23% N)12.0
Ammonium polyphosphate solution1.06-08-42
Phosphoric acid (54%)3.06-03-707
Xanthan gum0.058-15-818
Water4.0
Trace mineral premix 10.5
Vitamin premix 10.2
Lasalocid Type A medicated article (90.7 g/lb) 20.083

1 Content of the vitamin and trace mineral premixes may be varied; however, they should be comparable to those used by the firm for other free-choice feeds. Formulation modifications require FDA approval prior to marketing. Selenium must comply with 21 CFR 573.920. Ethylenediamine dihydroiodide (EDDI) should comply with FDA Compliance Policy Guides Sec. 651.100 (CPG 7125.18).

2 To provide 150 gm lasalocid per ton, use 1.652 lb (0.083%) of a lasalocid liquid Type A medicated article containing 90.7 g/lb. If using a dry lasalocid Type A medicated article containing 68 g/lb, use, use 2.206 lbs per ton (0.111%), replacing molasses. If using a dry lasalocid Type A medicated article containing 90.7 g/lb, use 1.652 lbs per ton (0.083%), adding molasses.

(ii) Amount. 150 grams per ton.

(iii) Indications for use. Pasture cattle (slaughter, stocker, feeder cattle, and dairy and beef replacement heifers): for increased rate of weight gain. Intakes of lasalocid in excess of 200 mg/head/day have not been shown to be more effective than 200 mg/head/day.

(iv) Limitations. For pasture cattle (slaughter, stocker, feeder cattle, and dairy and beef replacement heifers). Feed continuously on a free-choice basis at a rate of 60 to 300 milligrams lasalocid per head per day.

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

(4) It is used as a free-choice, loose mineral Type C feed as follows:

(i) Specifications.

Ingredient Percent International feed No.
Monocalcium phosphate (21% P)57.706-01-082
Salt17.556-04-152
Distillers dried grains w/ solubles5.405-28-236
Dried cane molasses (46% Sugars)5.204-04-695
Potassium chloride4.906-03-755
Trace mineral/vitamin premix 13.35
Calcium carbonate (38% Ca)2.956-01-069
Mineral oil1.058-03-123
Magnesium oxide (58% Mg)1.006-02-756
Iron oxide (52% Fe)0.106-02-431
Lasalocid Type A medicated article (68 g/lb) 20.80

1 Content of the vitamin and trace mineral premixes may be varied; however, they should be comparable to those used by the firm for other free-choice feeds. Formulation modifications require FDA approval prior to marketing. Selenium must comply with 21 CFR 573.920. Ethylenediamine dihydroiodide (EDDI) should comply with FDA Compliance Policy Guides Sec. 651.100 (CPG 7125.18).

2 To provide 1,088 g lasalocid per ton, use 16 lbs (0.80%) of a lasalocid Type A medicated article containing 68 g/lb. If using a lasalocid Type A medicated article containing 90.7 g/lb, use 12 lbs per ton (0.6%), adding molasses.

(ii) Amount. 1,088 grams per ton.

(iii) Indications for use. Pasture cattle (slaughter, stocker, feeder cattle, and dairy and beef replacement heifers): For increased rate of weight gain. Intakes of lasalocid in excess of 200 mg/head/day have not been shown to be more effective than 200 mg/head/day.

(iv) Limitations. Feed continuously on a free-choice basis at a rate of 60 to 300 mg lasalocid per head per day.

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

(5) Lasalocid may also be used in combination with:

(i) Chlortetracycline as in § 558.128.

(ii) Lincomycin as in § 558.325.

(iii) Melengestrol as in § 558.342.

(iv) Oxytetracycline as in § 558.450.

(v) Tylosin alone or in combination with melengestrol acetate as in § 558.625.

(vi) Virginiamycin as in § 558.635.

2. At 79 FR 13545, Mar. 11, 2014, § 558.311 was amended; however, the amendment could not be incorporated because of the inaccurate amendatory instruction.

[41 FR 44382, Oct. 8, 1976]

Editorial Notes:

1. For Federal Register citations affecting § 558.311, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at www.govinfo.gov.

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