Amphoprim® Injection

Antibiotic injection containing Trimethoprim, used to treat bacterial infections in cattle, sheep, goats, pigs, horses, dogs and cats

  • Cat
  • Horse
  • Cattle
  • Dog
  • Pigs
  • Sheep
  • Goat
  • AMR Class Orange
    AMR Class Orange
  • Antibiotic

Amphoprim® Injection is an antibiotic injection containing Trimethoprim and Sulphadimethyl pyrimidine. It’s used to treat bacterial infections in cattle, sheep, goats, pigs, horses, dogs and cats.

  • Can be administered by subcutaneous, intramuscular or intravenous injection.
  • Broad-spectrum.


  • Cattle, sheep, goats, pigs and horses: inject 1 ml/15 kg bodyweight daily, in the upper neck, by subcutaneous, intramuscular or intravenous injection, for 3 - 5 days.
  • For intramuscular or subcutaneous injections over 5 ml - administer at two or more injection sites. The recommended dose should not be exceeded in horses.


It is an offence for users of this product to cause residues exceeding the relevant MRL in the Food Notice: Maximum Residue Levels for Agricultural Compounds.

  • Milk (cattle): 48 hours / 4 milkings
  • Milk (sheep and goats): 35 days
  • Meat (cattle, sheep, goats and pigs): 5 days
  • Meat (horses): 63 days


Available in 100 ml glass vials.


This product is classified as orange under Antibiotic Judicious Use Guidelines for the New Zealand Veterinary Profession. Orange light antimicrobials are restricted to specifi­c indications or used as second line therapy under therapeutic conditions. Visit and talk to your Vet to learn more. Please use antibiotics responsibly.

To learn more about Amphoprim® Injection, download the Product Profile below and talk to your Vet.

Download SDS

Download Product Profile


Amphoprim® Injection is a Restricted Veterinary Medicine. Available only under Veterinary Authorisation. Registered pursuant to the ACVM Act 1997, No. A4730.

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