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Tribactral® S

Tribactral® S

Antibacterial Solution for Injection

Effective against most Gram-positive and Gram-negative bacteria. The two components produce a sequential double blockade of bacterial metabolism providing a broader spectrum of activity than either component acting alone.

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Technical Information

Active Constituent(s)

  • 200mg/mL Sulfadoxine
  • 40mg/mL Trimethoprim


For the treatment of infections caused by organisms sensitive to trimethoprim and sulfadoxine in cattle, sheep, pigs, horses, dogs and cats.


Cattle, Pigs, Sheep and Horses Dogs and Cats
1 mL/ 15 kg bodyweight daily.

Increase dose to 1 mL/ 10 kg bodyweight daily in cases of severe infection. Animals may be treated with injection alone or the initial injections followed by daily administration of an oral Tribrissen or Tribactral formulation.

Tribactral S may be used to initiate a course of treatment with Tribrissen 20 or 80 tablets; give a single 1 mL/15 kg bodyweight injection if following with the first tablet within 12 hours. Give a 1 mL/8 kg bodyweight injection if administration of the first tablet is to be delayed until the day following injection.

Withholding Period(s)

Meat (cattle, sheep, pigs): DO NOT USE less than 14 days before slaughter for human consumption.
Meat (horses): DO NOT USE less than 28 days before slaughter for human consumption.

Milk collected from cows and ewes within 36 hours (3 milkings) following a single treatment, or 72 hours (6 milkings) following the last of multiple treatments, MUST NOT BE USED for human consumption or processing. This milk should not be fed to bobby calves.

Trade Advice (ESI)

Export Slaughter Interval

This product does not have an ESI established. For advice on the ESI, contact Jurox Pty Ltd on 1800 023 312 before using this product.

Product Codes

Size Code
Injection: 100mL 60230