Sustain III® (Sulfamethazine)

Item #16370


Sustain III® (Sulfamethazine)

Sustain III - Calf Bolus - 123.8 grains (8.02 grams) Sulfamethazine (in a sustained release base). Cattle Bolus - 32.1 grams Sulfamethazine, Sustained Release. Read More

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Sustain III

Calf Bolus:
123.8 grains (8.02 grams) Sulfamethazine (Formulated in a sustained release base) are intended for oral administration to ruminating replacement calves (calves over one (1) month old that are not on an all-milk diet). Sustain III® Calf Boluses are indicated for the treatment of the following diseases when caused by one or more of the following pathogenic organisms sensitive to sulfamethazine: Bacterial Pneumonia (Pasteurella spp.), Colibacillosis (Bacterial Scours) (E. coli), and Calf Diphtheria (Fusobacterium necrophorum).

Cattle Bolus:
32.1 gm Sulfamethazine Sustained Release bolus that provides a high sulfamethazine blood level for 3 days. Use in beef cattle and non-lactating dairy cattle to treat shipping fever, bacterial scours, foot rot, calf diphtheria, acute mastitis and metritis when the causative agent is sensitive to sulfamethazine. Do not use in female dairy cattle 20 months of age or older, calves under 1 months of age or calves receiving only milk. 12-day withdrawal.


  • Cattle: 1 bolus per 200 lb
  • Calf: 1 bolus per 50 lb  (Intended for calves over 1 month old that are not on an all-milk diet.)

Any use of a product that is not clearly defined on the label directions should only be done under supervision of a qualified veterinary professional.

View manufacturer and/or label (CALF)
View manufacturer and/or label (CATTLE)


  • Brand: Bimeda
  • Ingredient: Sulfamethazine
  • Form: Bolus
  • Size: Jar of 25,Box of 50,Box of 10

Reviews (4)

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  1. 5.0 out of 5 stars


    It worked on my horse for mastitis!

  2. 5.0 out of 5 stars

    "Essential on-hand medication"

    We buy market calves and bottle calves, and Sustain III has proven itself to us. I highly recommend it for scours and shipping stress/ill. It completely turned around a beautiful little Angus bottle baby that had been orphaned and shipped to market. He grew to be a robust bull calf thanks to the swift efficacy of Sustain III, and the dosing schedule was much more convenient for me than other brands of the same medication.

  3. 5.0 out of 5 stars

    "Great pill for calves with scours!"

    I use these pills on my winter calves who seem to get the scours and then pass it on to other calves, they are like a miracle and really do work within hours! I stock up and keep a couple of jars in my tack box at all times. I highly recommend this product and it was recommended to me by my vet after I had stool samples done a few years ago.

  4. 5.0 out of 5 stars

    "Must have for calves"

    I raise mostly calves that I have purchased from the market. A lot of them pick up various sickness, or are sold because they are sick. I have tried several vaccines for scours and pneumonia with small success, however these boluses have turned calves around in as little as hours. Scours have turned around in a day. I treated a steer with foot rot with it. I keep some on hand.

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