Description
How Dectomax Injectable Endectocide works
Dectomax contains doramectin, a second-generation avermectin chemical with unique properties that extend its activity beyond other macrocyclic lactones. This means doramectin is able to stay active longer in the animal’s system, providing extended protection of up to 28 days against lungworm, and 21 days against major gastrointestinal worms.
Which parasites does Dectomax Injectable Endectocide control?Â
Dectomax is approved for the treatment of internal and external parasites in cattle, including beef cattle, pregnant cows, newborn calves, and bulls. Parasitic species Dectomax controls include:Â
Gastrointestinal roundworms (adults and fourth-stage larvae)
- Barber’s pole worm (Haemonchus placei)Â
- Black scour worm (Trichostrongylus colubriformis, Trichostrongylus longispicularis [adults only])Â
- Hookworm (Bunostomum phlebotomum)
- Nodule worm (Oesophagostomum radiatum)
- Roundworm (Toxocara vitulorum) [adults only]Â
- Small brown stomach worm, including inhibited larvae (Ostertagia ostertagi [O. lyrata])Â
- Small intestinal worm (Cooperia oncophora [C. surnabada / C. mcmasteri], Cooperia punctata, Cooperia pectinata)
- Stomach hair worm (Tricostrongylus axei)
Other major parasites
- Biting lice (Bovicola bovis) [aids in control only]Â
- Lungworm (Dictyocaulus viviparus) [adults and immature]
- Mange mites (Psoroptes bovis, Sarcoptes scabiei var bovis [not present in Australia])
- Sucking lice (Haematopinus eurysternus, Linognathus vituli, Solenopotes capillatus)
Always consult your veterinarian for assistance with diagnosing, treating, and controlling parasites.
Persistent protection periods when using Dectomax Injectable Endectocide
Dectomax injectable drench for cattle offers the following protection periods when utilised in accordance with label instructions:
| Parasite species | Duration of persistent protection |
| Barber’s pole worm (Haemonchus placei) | Up to 21 days |
| Hookworm (Bunostomum phlebotomum) | Up to 21 days |
| Lungworm (Dictyocaulus viviparus) | Up to 28 days |
| Nodule worm (Oesophagostomum radiatum) | Up to 21 days |
| Small brown stomach worm (Ostertagia ostertagi) | Up to 21 days |
| Small intestinal worm (Cooperia oncophora [C. surnabada / C. mcmasteri], Cooperia punctata, Cooperia pectinata) | Up to 14 days (Cooperia oncophora) and 21 days (Cooperia spp.) |
| Stomach hair worm (Trichostrongylus axei) | Up to 21 days |
What is the dosage rate for Dectomax Injectable Endectocide?Â
In cattle, the dosage rate for Dectomax is 1mL per every 50kg of body weight. It is administered via subcutaneous injection.
Why choose injectable cattle drenches over pour-ons?
Unlike pour-ons that must penetrate the skin and can be affected by dust, rain, or coat condition, Dectomax Injectable delivers doramectin directly into the bloodstream via subcutaneous injection. This ensures higher blood drug concentrations and more consistent parasite control regardless of environmental conditions.
This makes Dectomax an extremely worthwhile choice for producers, especially in tough conditions or where consistent results matter. If you’ve ever been disappointed by pour-on performance, switching to injectable treatments often pays for itself via better results.
How does Dectomax compare to ivermectin or moxidectin injectables?
The active ingredient in Dectomax, doramectin, offers longer persistent activity than ivermectin, which typically sits around 14 days, and comparable or slightly longer protection than moxidectin against most parasites. Its unique chemical structure gives doramectin extended retention in an animal’s tissue. Dectomax also provides up to 28 days of protection against lungworm, which is longer than most alternatives on the market, including ivermectin and moxidectin formulations.
Is Dectomax’s injectable formulation harder to use than a pour-on treatment?
While injecting your cattle drench does require proper restraints and a good injection technique, many producers prefer it for reliability. The tissue-friendly formulation makes injection easier, and Dectomax’s protective polycarbonate bottle shield with eye hook provides practicality for yard use. The 2.5L value pack also includes a metal applicator to make the job even simpler.Â
What is the safety margin of Dectomax doramectin injectable cattle drench?
During extensive field trials, Dectomax was proven to have a wide safety margin when administered to cattle of all ages. It has also been specifically formulated to minimise the risk of injection site pain after administration.
Can I use Dectomax on young calves?
Yes. Dectomax has a wide safety margin and has been proven safe for young calves, as well as pregnant cows and bulls. Always dose according to body weight to ensure efficacy and safety.Â
Will Dectomax help cattle gain weight?
Yes – according to field studies, Dectomax-treated cattle gained 24kg more than untreated cattle over a 140-day period. This is because effective parasite control ensures more nutrients penetrate the cow’s muscle and frame, instead of feeding worms.
Is Dectomax safe on dung beetles?Â
When used according to label instructions, Dectomax Injectable Endectocide is unlikely to have unintended environmental consequences, including on dung beetle populations. Increased mortality and impaired development of larvae may occur, but only for a limited period following treatment.


Karen Nemec (verified owner)
Use to combat paralysis ticks. Good product, well priced and speedy delivery
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Linda Grinter (verified owner)
Ordered, price+++, arrived in good timing, Thankyou
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