Pfizer - A convenient dosage form of sulfadimethoxine to be used in the treatment of foot rot, bacterial pneumonia, shipping fever and calf diphtheria in cattle. Initial dose (5gm): 1 bolus per 200 lbs. body weight. Each subsequent daily dose: 1/2 bolus per 200 lbs. body weight. Initial dose (15gm): 1 bolus per 600 lbs. body weight each subsequent daily dose. 1/2 bolus per 600 pounds body weight. Treatment should not be continued beyond five days. 7 day slaughter withdrawal. 60 hour milk withdrawal.