Eprinomectin and ivermectin are both macrocyclic lactone active ingredients used in cattle parasite-control products, but they are not the same active ingredient. Understanding that difference is important when comparing cattle pour-ons, withholding requirements and treatment history.
This guide compares Vetsense Eprinomec Pour-On, which contains 5 mg/mL eprinomectin, with ivermectin-based cattle pour-ons such as Vetsense Ivermec Pour-On and Ausmectin Cattle Pour-On.
Quick answer: Eprinomectin and ivermectin belong to the same broad chemical family, but they are different actives with different product labels, withholding requirements and approved claims. Always compare the current registered label before treatment.
What Is Eprinomectin?
Eprinomectin is a macrocyclic lactone active ingredient. Vetsense Eprinomec Pour-On contains 5 mg/mL eprinomectin and is registered for the treatment and control of label-specified internal and external parasites in beef and dairy cattle, with deer claims also included on the product label.
Vetsense Eprinomec is available in 250mL, 1L, 2.5L, 5L and 20L pack sizes.
See the complete range in our Vetsense Eprinomec Pour-On Australia collection.
What Is Ivermectin?
Ivermectin is also a macrocyclic lactone active ingredient used in cattle parasite-control products. Two ivermectin-based cattle pour-on ranges already available through Pet & Rural Supply Co are Vetsense Ivermec Pour-On and Ausmectin Cattle Pour-On.
Both Vetsense Ivermec and Ausmectin contain ivermectin 5 mg/mL. Their current registered labels should be checked for approved parasite claims, dose directions, withholding periods, contraindications and export requirements.
Eprinomectin vs Ivermectin: Key Differences
| Feature | Vetsense Eprinomec | Ivermectin Pour-Ons |
|---|---|---|
| Active ingredient | Eprinomectin 5 mg/mL | Ivermectin 5 mg/mL in Vetsense Ivermec and Ausmectin |
| Chemical family | Macrocyclic lactone | Macrocyclic lactone |
| Cattle meat withholding | Zero days according to the current Eprinomec label | Varies by product; check the current registered label |
| Cattle milk withholding | Zero days according to the current Eprinomec label | Varies by product; check the current registered label |
| Export Slaughter Interval | Zero days according to the current Eprinomec label | Varies by product; check the current registered label |
| Pack-size range | 250mL, 1L, 2.5L, 5L and 20L | Depends on the product range |
Why The Active Ingredient Matters
Changing brand names does not automatically mean changing chemical class. Eprinomectin and ivermectin are different active ingredients, but both belong to the macrocyclic lactone group.
When reviewing a cattle parasite program, consider the active ingredient, treatment history, target parasites, current label claims and any known or suspected resistance issues rather than relying on brand name alone.
For broader guidance, read our Cattle Wormer Resistance in Australia: Why Rotation Matters article.
Withholding Periods Can Be A Major Difference
One of the clearest practical differences between Vetsense Eprinomec and some ivermectin-based cattle pour-ons is withholding.
The current Vetsense Eprinomec label states zero days for cattle meat, zero days for cattle milk and zero days for the Export Slaughter Interval. Ivermectin products should be checked individually because withholding and export requirements can differ by product.
This can be particularly relevant when comparing options for dairy cattle or cattle close to market, but the correct product still depends on the approved parasite claims and the full label directions.
How To Compare Eprinomec, Ivermec And Ausmectin
- Check the active ingredient.
- Confirm the target parasites are included on the current label.
- Check beef and dairy directions.
- Compare meat and milk withholding periods.
- Check the Export Slaughter Interval.
- Review treatment history and resistance considerations.
- Confirm the correct dose rate.
- Select a pack size appropriate to herd requirements.
Use our Choosing A Cattle Pour-On Product Australia guide for a broader selection checklist.
Vetsense Eprinomec Pour-On
Vetsense Eprinomec Pour-On is available in five pack sizes:
- 250mL
- 1L
- 2.5L
- 5L
- 20L
Compare all five sizes in the Vetsense Eprinomec Pour-On Australia collection.
For a product-specific overview, read Vetsense Eprinomec Pour-On for Cattle: What Makes It Different?.
Vetsense Ivermec Pour-On
Vetsense Ivermec Pour-On contains ivermectin 5 mg/mL and is available in multiple pack sizes for cattle.
Read the Vetsense Ivermec Pour-On Guide Australia.
Ausmectin Cattle Pour-On
Ausmectin Cattle Pour-On also contains ivermectin 5 mg/mL and is available in 250mL, 1L, 2.5L, 5L and 20L pack sizes.
Compare sizes in the Ausmectin Cattle Pour-On Australia collection, or read the Ausmectin Cattle Pour-On Guide Australia.
Related Cattle Pour-On Guides
- Best Cattle Pour-On Treatments Australia
- Choosing A Cattle Pour-On Product Australia
- Vetsense Eprinomec Pour-On for Cattle: What Makes It Different?
- Vetsense Ivermec Pour-On Guide Australia
- Ausmectin Cattle Pour-On Guide Australia
Frequently Asked Questions
Are eprinomectin and ivermectin the same?
No. They are different active ingredients, although both belong to the macrocyclic lactone group.
What active ingredient is in Vetsense Eprinomec?
Vetsense Eprinomec contains 5 mg/mL eprinomectin.
What active ingredient is in Vetsense Ivermec?
Vetsense Ivermec contains 5 mg/mL ivermectin.
Does Eprinomec have a cattle milk withholding period?
The current Eprinomec label states a zero-day cattle milk withholding period. Always confirm the current registered label before treatment.
Does changing from ivermectin to eprinomectin mean changing chemical class?
No. They are different active ingredients, but both belong to the macrocyclic lactone group. Treatment decisions should consider parasite susceptibility, resistance history and current approved label guidance.
Important: Always read and follow the current registered product label before use. Product claims, withholding periods and directions should be confirmed from the current label.