Section 520.2240a - Sulfaethoxypyridazine solution(a)Specifications. Each milliliter of solution contains 62.5 milligrams (mg) sodium sulfaethoxypyridazine.(b)Sponsor. See No. 054771 § 510.600(c) of this chapter.(c)Related tolerances. See § 556.650 of this chapter.(d)Conditions of use - (1)Swine - (i)Amount. Administer 3.8 grams per gallon for first day followed by 1.9 grams per gallon for not less than 3 days nor more than 9 days. Use as the sole source of sulfonamide.(ii)Indications for use. For treatment of bacterial scours pneumonia enteritis, bronchitis, septicemia accompanying Salmonella choleraesuis infection.(iii)Limitations. Do not treat within 10 days of slaughter. Federal law restricts this drug to use by or on the order of a licensed veterinarian.(2)Cattle - (i)Amount. For use at 2.5 grams per gallon. Administer at the rate of 1 gallon per 100 pounds of body weight per day for 4 days. Use as the sole source of sulfonamide.(ii)Indications for use. For treatment of respiratory infections (pneumonia, shipping fever), foot rot, calf scours; and as adjunctive therapy in septicemia accompanying mastitis and metritis.(iii)Limitations. Do not treat within 16 days of slaughter. Milk that has been taken from animals during treatment and for 72 hours (6 milkings) after latest treatment must not be used for food. Federal law restricts this drug to use by or on the order of a licensed veterinarian. 79 FR 28830 , May 20, 2014