21 CFR § 558.515 - Robenidine.
---
identifier: "/us/cfr/t21/s558.515"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "21 CFR § 558.515 - Robenidine."
title_number: 21
title_name: "Food and Drugs"
section_number: "558.515"
section_name: "Robenidine."
chapter_name: "FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES"
subchapter_number: "E"
subchapter_name: "ANIMAL DRUGS, FEEDS, AND RELATED PRODUCTS"
part_number: "558"
part_name: "NEW ANIMAL DRUGS FOR USE IN ANIMAL FEEDS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "21 U.S.C. 354, 360b, 360ccc, 360ccc-1, 371."
regulatory_source: "40 FR 13959, Mar. 27, 1975, unless otherwise noted."
cfr_part: "558"
---
# 558.515 Robenidine.
(a) *Specifications.* Type A medicated articles containing 30 grams per pound.
(b) *Sponsor.* See No. 054771 in § 510.600(c) of this chapter.
(c) *Related tolerances.* See § 556.580 of this chapter.
(d) *Special considerations.* Type C feed containing robenidine hydrochloride must be fed within 50 days from the date of manufacture. Do not use in Type B or Type C medicated feeds containing bentonite.
(e) *Conditions of use.* It is used in feed for chickens as follows:
| Robenidine hydrochloride in grams/ton | Combination ingrams/ton | Indications for use | Limitations | Sponsor |
| --- | --- | --- | --- | --- |
| 30 (0.0033 pct) | | Broiler chickens: As an aid in the prevention of coccidiosis caused by and | Feed continuously as sole ration. Do not feed to chickens producing eggs for food. Withdraw 5 days prior to slaughter. | 054771 |
| | Bacitracin (as bacitracin methylenedisalicylate) 4 to 30 | For broiler and fryer chickens: As an aid in the prevention of coccidiosis caused by and For increased rate of weight gain. | Feed continuously as sole ration. Do not feed to laying chickens. Withdraw 5 days prior to slaughter. | 054771 |
| | Bacitracin (as bacitracin methylenedisalicylate) 27 to 50 | For broiler and fryer chickens: As an aid in the prevention of coccidiosis caused by and For improved feed efficiency. | Feed continuously as sole ration. Do not feed to laying chickens. Withdraw 5 days prior to slaughter. | 054771 |
| | Bacitracin (as bacitracin methylenedisalicylate) 50 | For broiler and fryer chickens: As an aid in the prevention of necrotic enteritis caused or complicated by spp. or other organisms susceptible to bacitracin. | Feed continuously as sole ration. Do not feed to laying hens. Withdraw 5 days before slaughter. | 054771 |
| | Bacitracin (as bacitracin methylenedisalicylate) 100 to 200 | For broiler and fryer chickens: As an aid in the control of necrotic enteritis caused or complicated by Clostridium spp. or other organisms susceptible to bacitracin. | To control a necrotic enteritis outbreak, start medication at first clinical signs of disease; administer continuously for 5 to 7 days or as long as clinical signs persist, then reduce bacitracin methylenedisalicylate to prevention level (50 g/ton). Do not feed to laying hens. Withdraw 5 days before slaughter. | 054771 |
| | Bacitracin (as bacitracin zinc) 4 to 30 | For broiler and fryer chickens: As an aid in the prevention of coccidiosis caused by and For increased rate of weight gain. | Feed continuously as sole ration. Do not feed to laying chickens. Withdraw 5 days prior to slaughter. | 054771054771 |
| | Bacitracin (as bacitracin zinc) 27 to 50 | For broiler and fryer chickens: As an aid in the prevention of coccidiosis caused by and For improved feed efficiency. | Feed continuously as sole ration. Do not feed to laying chickens. Withdraw 5 days prior to slaughter. | 054771054771 |
(f) Robenidine may also be used in combination with:
(1) Chlortetracycline as in § 558.128.
(2) Lincomycin as in § 558.325.
(3) Oxytetracycline as in § 558.450.
[40 FR 13959, Mar. 27, 1975]
For citations affecting § 558.515, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at