An Effective Antibiotic That Lasts A Full Three Days With Just One Treatment For Use In Calves For Treatment Of Bacterial Pneumonia, Colibacillosis, and Calf Diphtheria For Use On Calves, Designed To Be Administered Orally Highly Concentrated Provides Peak Antibiotic Blood Levels Of 250 P. P. M. Quickly Acts To Break Fever and Illness Short Withdrawal Time 12 Days Ingredients:Antibacterial sulfamethazine sustained release bolus Search_Phrases: Farm Animal,Farm,Animal,Remedies,Aids,Vaccine,Durvet Inc,Durvet Sustain Iii Calf Bolus 25 Tab