Dectomax® Injectable


  • Dectomax Injectable is indicated for the treatment and control of gastrointestinal roundworms, lungworms, sucking lice, biting lice, cattle tick and mange mites.
  • Dectomax Injectable is the high performance sports car of drenches. It’s the method of choice for Australia’s leading cattle producers to control internal and external parasites in the herd. Beef cattle can be attacked in two ways. Worms affect their stomach and small and large intestines, while their skin is affected by external parasites such as lice and ticks. Dectomax Injectable gets right to where most of the worm damage is caused. By getting right to the source of the problem, you get less product wastage, a consistent dose and a guarantee that worms will have nowhere to hide. Dectomax Injectable has also been formulated to minimise pain and tissue reaction and is easy to use. Dectomax Injectable gets to where it’s needed most – for longer.

Recommendations for use

Dectomax Injectable is approved for:

  • The treatment and control of internal and external parasites of cattle
  • Beef cattle, including pregnant cows, newborn calves and bulls
  • The control of the following harmful species of gastrointestinal roundworms, lungworms, sucking lice, biting lice, cattle tick and mange mites.

Consult your veterinarian for assistance in the diagnosis, treatment, and control of parasitism.

Gastrointestinal roundworms (adults and fourth-stage larvae)

  • Ostertagia ostertagi (including inhibited larvae) – Small brown stomach worm
  • Haemonchus placei – Barbers pole worm
  • Trichostrongylus axei – Stomach hair worm
  • T. colubriformis – Black scour worm
  • T. longispicularis*
  • Cooperia oncophora – Small intestinal worm
  • Cooperia spp.
  • Bunostomum phlebotomum* – Hook worm
  • Oesophagostomum radiatum – Nodule worm
  • Toxocara vitulorum* – Round worm

*Adults only.

Lungworms (adults and immature)

  • Dictyocaulus viviparus.

Sucking lice

  • Haematopinus eurysternus
  • Linognathus vituli
  • Solenopotes capillatus.

Biting lice

  • Effective as an aid in the control of biting louse (Bovicola bovis).

Mange mites

  • Psoroptes bovis
  • Sarcoptes scabiei var bovis**

**Not present in Australia.

The Zoetis Advantage

  • Dectomax Injection is easy to inject and delivers a reliable dose of doramectin, to ensure your cattle receive the maximum benefit of the doramectin administered.
Consistent reliable results
  • As an injectable formulation, Dectomax Injectable delivers effective reliable parasite control.
  • Unlike a Pour-On formulation there are no barriers to absorption such as skin, dust, and environmental factors. The injectable formulation also reaches higher blood drug concentration.
Control of the worms that matter
  • Consistent, persistent activity against the most prevalent internal parasites of grazing cattle in Australia To discover the most important cattle worms in your area visit:
Extended cattle tick protection
  • Dectomax Injectable protects against the development of viable cattle tick for 28 days.
  • It also controls sucking lice and aids in the control of biting lice and mange mites.
Tissue friendly formulation
  • Dectomax Injectable is an oil based formulation which is tissue friendly and easy to inject.
Less pasture contamination means fewer treatments
  • Because it protects for longer, Dectomax keeps pastures cleaner for longer. Which means you can extend the time between treatments. And fewer treatments save time and money.
Wide safety margin
  • Dectomax Injectable has a wide safety margin in all ages of stock, including young calves, pregnant stock and bulls.


Administer Dectomax Injectable solution at the recommended dosage of 1 mL (10 mg doramectin) per 50 kg body weight by subcutaneous injection. Injections should be given using 16- to 18-gauge needles, regardless of administration route. Needles (12-18 mm) in length are suggested for SC injections, which should be given under the loose skin in front of or behind the shoulder.

Pack Sizes

500 mL multi-dose, rubber-capped amber glass bottles contained in a clear polycarbonate shield.

The polycarbonate shield holds the bottle during use, has a pre-drilled eye-hook for easy hanging.

Additional Information

Persistent Protection

Australian trials have demonstrated the following levels of persistent protection against re-infection from seven common and important worm species.

Species Period of protection following treatment
Cooperia spp. Up to 21 days
Cooperia oncophora Up to 14 days
Ostertagia ostertagi Up to 21 days
Haemonchus placei Up to 21 days
Dictyocaulus viviparus Up to 28 days
Oesophagostomum radiatum Up to 21 days
Trichostrongylus axei Up to 21 days
Bunostomum phlebotomum Up to 21 days

Registered Label Warnings

Withholding periods

Meat: Cattle 42 days.

Milk: Do not use during lactation or less than 60 days before calving when milk or milk products are to be used for human consumption or processing.

Export Slaughter Interval (ESI): DO NOT USE less than 42 days before slaughter for human consumption.


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