Section 520.2610 - Trimethoprim and sulfadiazine tablets(a)Specifications. Each tablet contains 30 milligrams (mg) (5 mg trimethoprim and 25 mg sulfadiazine), 120 mg (20 mg trimethoprim and 100 mg sulfadiazine), 480 mg (80 mg trimethoprim and 400 mg sulfadiazine) or 960 mg (160 mg trimethoprim and 800 mg sulfadiazine).(b)Sponsors. See Nos. 000061 and 054771 in § 510.600(c) of this chapter.(c)Conditions of use in dogs - (1)Amount. Administer orally at 30 mg per kilogram of body weight (14 milligrams per pound) once daily. Alternatively, especially in severe infections, the initial dose may be followed by one-half the recommended daily dose every 12 hours. Administer for 2 to 3 days after symptoms have subsided. Do not treat for more than 14 consecutive days.(2)Indications for use. The drug is used in dogs where systemic antibacterial action against sensitive organisms is required, either alone or as an adjunct to surgery or debridement with associated infection. The drug is indicated where control of bacterial infection is required during the treatment of acute urinary tract infections, acute bacterial complications of distemper, acute respiratory tract infections, acute alimentary tract infections, wound infections, and abscesses.(3)Limitations. Federal law restricts this drug to use by or on the order of a licensed veterinarian. 79 FR 28833 , May 20, 2014