# Lasalocid.
**AGENCY:**
Food and Drug Administration, HHS.
**ACTION:**
Final rule.
**SUMMARY:**
The Food and Drug Administration (FDA) is amending the animal drug regulations to reflect approval of a supplemental new animal drug application (NADA) filed by Alpharma Inc. The supplemental NADA provides for the use of lasalocid Type A medicated articles containing 20 percent lasalocid activity per pound to make free-choice Type C medicated feeds used for increased rate of weight gain in pasture cattle (slaughter, stocker, feeder cattle, and dairy and beef replacement heifers).
**DATES:**
This rule is effective November 21, 2006.
**FOR FURTHER INFORMATION CONTACT:**
Eric S. Dubbin, Center for Veterinary Medicine (HFV-126), Food and Drug Administration, 7500 Standish Pl., Rockville, MD 20855; tel: 301-827-0232; e-mail: *[email protected]* .
**SUPPLEMENTARY INFORMATION:**
Alpharma Inc., One Executive Dr., Fort Lee, NJ 07024, filed a supplement to NADA 96-298 for use of BOVATEC 91 (lasalocid) Type A medicated article (20 percent lasalocid activity per pound) to make free-choice Type C medicated feeds used for increased rate of weight gain in pasture cattle (slaughter, stocker, feeder cattle, and dairy and beef replacement heifers). The supplemental NADA is approved as of October 20, 2006, and the regulations are amended in 21 CFR 558.311 to reflect the approval. The basis of approval is discussed in the freedom of information summary.
In accordance with the freedom of information provisions of 21 CFR part 20 and 21 CFR 514.11(e)(2)(ii), a summary of safety and effectiveness data and information submitted to support approval of this application may be seen in the Division of Dockets Management (HFA-305), Food and Drug Administration, 5630 Fishers Lane, rm. 1061, Rockville, MD 20852, between 9 a.m. and 4 p.m., Monday through Friday.
The agency has determined under 21 CFR 25.33(a)(1) that this action is of a type that does not individually or cumulatively have a significant effect on the human environment. Therefore, neither an environmental assessment nor an environmental impact statement is required.
This rule does not meet the definition of “rule” in 5 U.S.C. 804(3)(A) because it is a rule of “particular applicability.” Therefore, it is not subject to the congressional review requirements in 5 U.S.C. 801-808.
**List of Subject in 21 CFR Part 558**
Animal drugs, Animal feeds.
**21 CFR Part 558**
Therefore, under the Federal Food, Drug, and Cosmetic Act and under authority delegated to the Commissioner of Food and Drugs and redelegated to the Center for Veterinary Medicine, 21 CFR part 558 is amended as follows:
**21 CFR Part 558**
**PART 558—NEW ANIMAL DRUGS FOR USE IN ANIMAL FEEDS**
1. The authority citation for 21 CFR part 558 continues to read as follows:
**Authority:**
21 U.S.C. 360b, 371.
**21 CFR Part 558**
2. In § 558.311, revise paragraphs (e)(2)(i), (e)(2)(ii), (e)(3)(i), (e)(3)(ii), and (e)(4)(i) to read as follows:
§ 558.311
(e) * * *
(2) * * *
(i) *Specification* .
| Ingredient | Percent | International feed No. |
| --- | --- | --- |
| Defluorinated phosphate (20.5% Ca, 18.5% P) | 35.9 | 6-01-080 |
| Sodium chloride (salt) | 20.0 | 6-04-152 |
| Calcium carbonate (38% Ca) | 18.0 | 6-01-069 |
| Cottonseed meal | 10.0 | 5-01-621 |
| Potassium chloride | 3.0 | 6-03-755 |
| Selenium premix (0.02 percent Se) | 3.0 | |
| Dried cane molasses (46% sugars) | 2.5 | 4-04-695 |
| Magnesium sulfate | 1.7 | 6-02-758 |
| Vitamin premix | 1.4 | |
| Magnesium oxide (58% Mg) | 1.2 | 6-02-756 |
| Potassium sulfate | 1.2 | 6-06-098 |
| Trace mineral premix | 1.04 | |
| Lasalocid Type A medicated article (68 g/lb) | 1.06 | |
(ii) *Amount* . 1,440 grams per ton.
(3) * * *
(i) *Specification* .
| Ingredient | Percent | International feed No. |
| --- | --- | --- |
| Cane molasses | 55.167 | 4-13-241 |
| Condensed molasses fermentation solubles | 24.0 | |
| 50% Urea Solution (23% N) | 12.0 | |
| Ammonium polyphosphate solution | 1.0 | 6-08-42 |
| Phosphoric acid (54%) | 3.0 | 6-03-707 |
| Xanthan gum | 0.05 | 8-15-818 |
| Water | 4.0 | |
| Trace mineral premix | 0.5 | |
| Vitamin premix | 0.2 | |
| Lasalocid Type A medicated article (90.7 g/lb) | 0.083 | |
(ii) *Amount* . 150 grams per ton.
(4) * * *
(i) *Specification* .
| Ingredient | Percent | International feed No. |
| --- | --- | --- |
| Monocalcium phosphate (21% P) | 57.70 | 6-01-082 |
| Salt | 17.55 | 6-04-152 |
| Distillers dried grains w/ solubles | 5.40 | 5-28-236 |
| Dried cane molasses (46% Sugars) | 5.20 | 4-04-695 |
| Potassium chloride | 4.90 | 6-03-755 |
| Trace mineral/vitamin premix | 3.35 | |
| Calcium carbonate (38% Ca) | 2.95 | 6-01-069 |
| Mineral oil | 1.05 | 8-03-123 |
| Magnesium oxide (58% Mg) | 1.00 | 6-02-756 |
| Iron oxide (52% Fe) | 0.10 | 6-02-431 |
| Lasalocid Type A medicated article (68 g/lb) | 0.80 | |
Dated: November 7, 2006.
Steven D. Vaughn,
Director, Office of New Animal Drug Evaluation, Center for Veterinary Medicine.