CFR > Title 21 - Food and Drugs > CHAPTER I—FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES > SUBCHAPTER E—ANIMAL DRUGS, FEEDS, AND RELATED PRODUCTS (parts 500 to 590) > PART 520—ORAL DOSAGE FORM NEW ANIMAL DRUGS > 520.2240b—Sulfaethoxypyridazine tablets.

520.2240b—Sulfaethoxypyridazine tablets.

(a) Chemical name. N′-(6-Ethoxy-3-pyridazinyl) sulfanilamide.
(b) Specifications. Melting point range of 180 °C to 186 °C.
(c) Sponsor. See No. 053501 in § 510.600(c) of this chapter.
(d) Related tolerances. See § 556.650 of this chapter.
(e) Conditions of use. It is used for cattle as follows:
(1) Amount. 2.5 or 15 grams per tablet.
(i) Indications for use. Treatment of respiratory infections (pneumonia, shipping fever), foot rot, calf scours; as adjunctive therapy in septicemia accompanying mastitis and metritis.
(ii) Limitations. Administer 25 milligrams per pound of animal weight per day for 4 days; do not treat within 16 days of slaughter; as sole source of sulfonamide; milk that has been taken from animals during treatment and for 72 hours (6 milkings) after the latest treatment must not be used for food; for use only by or on the order of a licensed veterinarian.
(2) Amount. 15-gram controlled release tablets.
(i) Indications for use. Treatment of foot rot and respiratory infections (shipping fever and pneumonia) caused by sulfonamide-susceptible pathogens (E. coli, streptococci, staphylococci, Sphaerophorus necrophorus and Gram-negative rods including Pasteurella ); for use prophylactically in cattle during periods of stress for reducing losses due to sulfonamide sensitive disease conditions.
(ii) Limitations. Administer 100 milligrams per pound of body weight; do not treat within 16 days of slaughter; as sole source of sulfonamide; not for use in lactating dairy cows; Federal law restricts this drug to use by or on the order of a licensed veterinarian.

Code of Federal Regulations

[40 FR 13838, Mar. 27, 1975, as amended at 67 FR 78355, Dec. 24, 2002]