# Purina Mills, Inc., et al.; Withdrawal of Approval of New Animal Drug Applications
**AGENCY:**
Food and Drug Administration, HHS.
**ACTION:**
Notice.
**SUMMARY:**
The Food and Drug Administration (FDA) is withdrawing approval of 11 new animal drug applications (NADAs) listed below. In a final rule published elsewhere in this issue of the *Federal Register* , FDA is amending the animal drug regulations to remove the portions reflecting approval of the NADAs because the products are no longer manufactured or marketed.
**DATES:**
Withdrawal of approval is effective May 21, 2001.
**FOR FURTHER INFORMATION CONTACT:**
Pamela K. Esposito, Center for Veterinary Medicine (HFV-210), Food and Drug Administration, 7500 Standish Pl., Rockville, MD 20855, 301-827-5593.
**SUPPLEMENTARY INFORMATION:**
The following sponsors have requested that FDA withdraw approval of the NADAs listed below because the products are no longer manufactured or marketed:
| Sponsor | NADA No. Product | 21 CFR Cite Affected |
| --- | --- | --- |
| Purina Mills, Inc., P.O. Box 66812, St. Louis, MO 63166-6812 | NADA 48-915 Purina® Bot Control (trichlorfon) | 520.2520a (017800) |
| Golden Sun Feeds, Inc., 111 South Fifth St., Estherville, IA 51334 | NADA 97-567 Tylan® 10 Premix (tylosin phosphate) | 558.625(b)(17) (021780) |
| | NADA 97-615 Swine Med-A-Mix TS 8000 Premix, Tylan® 5, 10, 20, 40 Sulfa-G (tylosin phosphate and sulfamethazine) | 558.630(b)(4) and (b)(10) (021780) |
| Quali-Tech Products, Inc., 318 Lake Hazeltine Dr., Chaska, MN 55318-1093 | NADA 110-440 Hygromix Hygrowormer Hyanthelmix (hygromycin B) | 558.274(a)(2), (a)(3), (a)(4), (c)(1)(i), and (c)(1)(ii) (016968) |
| Steris Laboratories, Inc., 620 North 51st Ave., Phoenix, AZ 85043-4705 | NADA 44-585 Oxytocin Injection | 522.1680 (000402) |
| | NADA 45-578 Lidocaine Hydrochloride with Epi-nephrine Injection 2% | 522.1258 (000402) |
| | NADA 45-737 Sodium Pentobarbital Injection | 522.1704(b) (000402) |
| | NADA 45-848 Phenylbutazone Injection | 522.1720 (000402) |
| | NADA 110-349 Dexamethasone Injection | 522.540(c)(2) (000402) |
| | NADA 110-350 Dexamethasone Injection | 522.540(b)(2)(ii) (000402) |
| | NADA 117-973 Prednisolone Sodium Succinate for Injection | 522.1884(c) (000402) |
Therefore, under authority delegated to the Commissioner of Food and Drugs (21 CFR 5.10), redelegated to the Center for Veterinary Medicine (21 CFR 5.84), and in accordance with § 514.115 *Withdrawal of approval of applications* (21 CFR 514.115), notice is given that approval of NADAs 44-585, 45-578, 45-737, 45-848, 48-915, 97-567, 97-615, 110-349, 110-350, 110-440, and 117-973, and all supplements and amendments thereto, is hereby withdrawn, effective May 21, 2001.
In a final rule published elsewhere in this issue of the *Federal Register* , FDA is amending the animal drug regulations to reflect the withdrawal of approval of these NADAs.
Dated: May 2, 2001.
Stephen F. Sundlof,
Director, Center for Veterinary Medicine.