21 CFR 558.633
§ 558.633 Tylvalosin.
United States · 21 CFR — Food and Drugs · Status: effective
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- Citation
- 21 CFR 558.633, § 558.633 Tylvalosin, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/87897
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Full text
(a) Specifications. Type A medicated articles containing 77.12 grams tylvalosin per pound as tylvalosin tartrate.
(b) Sponsor. See No. 066916 in § 510.600(c) of this chapter.
(c) Related tolerances. See § 556.748 of this chapter.
(d) Special considerations.
(1) Federal law restricts medicated feed containing this veterinary feed directive (VFD) drug to use by or on the order of a licensed veterinarian. See § 558.6 for additional requirements.
(2) VFDs for tylvalosin shall not be refilled.
(3) Crumbled Type C medicated feeds must bear an expiration date of 7 days after the date of manufacture.
(e) Conditions of use.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.