# 558.366 Nicarbazin.
(a) *Specifications.* Type A medicated articles containing 25 percent nicarbazin.
(b) *Sponsors.* See Nos. 060728, 066104, and 069254 in § 510.600(c) of this chapter.
(c) *Related tolerances.* See § 556.445 of this chapter.
(d) *Conditions of use.* It is used as follows:
(1) *Chickens*—
| Nicarbazin ingrams per ton | Combinationin grams per ton | Indications for use | Limitations | Sponsor |
| --- | --- | --- | --- | --- |
| (i) 90.8 to 181.6 | | Chickens: As an aid in preventing outbreaks of cecal () and intestinal ( and ) coccidiosis | Feed continuously as sole ration from time chicks are placed on litter until past the time when coccidiosis is ordinarily a hazard. Do not use as a treatment for outbreaks of coccidiosis. Do not use in flushing mashes. Do not feed to laying hens. Withdraw 4 days before slaughter for use levels at or below 113.5 g/ton. Withdraw 5 days before slaughter for use levels above 113.5 g/ton | 066104 |
| (ii) 90.8 to 181.6 | Bacitracin methylenedisalicylate, 4 to 50 | Broiler chickens: As an aid in preventing outbreaks of cecal () and intestinal ( and ) coccidiosis, and for increased rate of weight gain and improved feed efficiency | Feed continuously as sole ration from time chicks are placed on litter until past the time when coccidiosis is ordinarily a hazard. Do not use as a treatment for outbreaks of coccidiosis. Do not use in flushing mashes. Do not feed to laying hens. Withdraw 4 days before slaughter for use levels at or below 113.5 g/ton. Withdraw 5 days before slaughter for use levels above 113.5 g/ton. Nicarbazin as provided by No. 066104; bacitracin methylenedisalicylate as provided by No. 054771 in § 510.600(c) of this chapter | 054771 |
| (iii) 90.8 to 181.6 | Bacitracin methylenedisalicylate, 30 | Broiler chickens; As an aid in preventing outbreaks of cecal () and intestinal ( and ) coccidiosis, and for increased rate of weight gain and improved feed efficiency | Feed continuously as sole ration from time chicks are placed on litter until past the time when coccidiosis is ordinarily a hazard. Do not use as a treatment for coccidiosis. Do not use in flushing mashes. Do not feed to laying hens. Withdraw 4 days before slaughter for use levels at or below 113.5 g/ton. Withdraw 5 days before slaughter for use levels above 113.5 g/ton. Nicarbazin as provided by No. 066104; bacitracin methylenedisalicylate as provided by No. 054771 in § 510.600(c) of this chapter | 066104 |
| (iv) 90.8 to 181.6 | Bacitracin methylenedisalicylate 50 | Broiler chickens: As an aid in preventing outbreaks of cecal () and intestinal ( and ) coccidiosis, and 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 from time chicks are placed on litter until past the time when coccidiosis is ordinarily a hazard. Do not use as a treatment for outbreaks of coccidiosis. Do not use in flushing mashes. Do not feed to laying hens. Withdraw 4 days before slaughter for use levels at or below 113.5 g/ton. Withdraw 5 days before slaughter for use levels above 113.5 g/ton. Nicarbazin as provided by No. 066104; bacitracin methylenedisalicylate as provided by No. 054771 in § 510.600(c) of this chapter | 054771 |
| (v) 113.5 | | Chickens: As an aid in preventing outbreaks of cecal () and intestinal ( and ) coccidiosis | Feed continuously as sole ration from time chicks are placed on litter until past the time when coccidiosis is ordinarily a hazard. Do not use as a treatment for coccidiosis. Do not use in flushing mashes. Do not feed to laying hens. Withdraw 4 days before slaughter | 060728
069254 |
| (vi) 113.5 | Bacitracin methylenedisalicylate, 30 | Broiler chickens; aid in preventing outbreaks of cecal () and intestinal ( and ) coccidiosis, and for increased rate of weight gain and improved feed efficiency | Feed continuously as sole ration from time chicks are placed on litter until past the time when coccidiosis is ordinarily a hazard. Do not use as a treatment for coccidiosis. Do not use in flushing mashes. Do not feed to laying hens. Withdraw 4 days before slaughter. Nicarbazin as provided by No. 066104; bacitracin methylenedisalicylate as provided by No. 054771 in § 510.600(c) of this chapter | 060728 |
| (vii) 113.5 | Bacitracin zinc, 4 to 50 | Broiler chickens; aid in preventing outbreaks of cecal () and intestinal ( and ) coccidiosis, and for increased rate of weight gain and improved feed efficiency | For broiler chickens only. Feed continuously as sole ration from time chicks are placed on litter until past the time when coccidiosis is ordinarily a hazard. Do not use in flushing mashes. Do not feed to laying hens. Withdraw 4 days before slaughter. Nicarbazin as provided by No. 066104, bacitracin zinc as provided by No. 054771 in § 510.600(c) of this chapter | 054771066104 |
| (viii) 113.5 | Bambermycins, 1 to 2 | Broiler chickens: As an aid in preventing outbreaks of cecal () and intestinal ( and ) coccidiosis, and for increased rate of weight gain and improved feed efficiency | Feed continuously as sole ration from time chicks are placed on litter until past the time when coccidiosis is ordinarily a hazard; do not use as a treatment for coccidiosis. Do not use in flushing mashes. Do not feed to laying hens. Withdraw 4 days before slaughter. Nicarbazin as provided by No. 066104; bambermycins as provided by No. 016592 in § 510.600(c) of this chapter | 016592 |
(2) Nicarbazin single-ingredient Type A medicated articles may also be used in combination with:
(i) [Reserved]
(ii) Virginiamycin as in § 558.635.
[83 FR 64743, Dec. 18, 2018, as amended at 86 FR 14825, Mar. 19, 2021; 88 FR 14907, Mar. 10, 2023; 88 FR 55570, Aug. 16, 2023]