Sulfamethazine

Cattle, horses

225 mg/kg, PO, once, followed by 110 mg/kg, PO, q 24 h for 4 doses

ELDU of sulfonamides is prohibited in lactating dairy cattle in the US

Calves, swine

247 mg/kg, PO, once, followed by 123.75 mg/kg, PO, q 24 h for 3 days as drench or drinking water

Chickens, excluding layers

134–195 mg/kg, PO as medicated water, q 24 h for up to 6 days

Sulfadimethoxine

Cattle, excluding veal

55 mg/kg, PO or IV, once, followed by 27.5 mg/kg, PO or IV, q 24 h for up to 5 days

Dogs, cats

55 mg/kg, PO, IV, or SC, once, followed by 27.5 mg/kg, PO, IV, or SC, q 24 h

Chickens (excluding layers)

0.05% drinking water solution for 6 days

Also available as a veterinary feed directive product

Sulfaethoxypyridazine

Cattle

55 mg/kg, PO or IV, q 24 h for 4 days