Species

LONGRANGE® (eprinomectin)

The first and only injectable dewormer that delivers up to 150 days of extended parasite control in a single dose1

 

 

Details

Break free from the limited protection of regular deworming by providing up to 150 days1 of parasite control in a single dose with LONGRANGE® (eprinomectin). While you can’t control everything out here, LONGRANGE gives you peace of mind that you’ll see bigger gains, better reproduction and greater returns.

 

LONGRANGE IMPORTANT SAFETY INFORMATION: Do not treat within 48 days of slaughter. Not for use in female dairy cattle 20 months of age or older, including dry dairy cows, or in veal calves. Post-injection site damage (e.g., granulomas, necrosis) can occur. These reactions have disappeared without treatment. Not for use in breeding bulls, or in calves less than 3 months of age. Not for use in cattle managed in feedlots or under intensive rotational grazing. Pregnant women should wear gloves and exercise caution or avoid handling this product.

 

For more information, including full prescribing information, visit https://bit.ly/LongRangePI or call 888-637-4251.

Features & Benefits

LONGRANGE® (eprinomectin) uses THERAPHASE® technology to extend parasite control for up to 150 days1 in a single dose, outlasting the typical 2 to 42 days2 of protection offered by conventional dewormers.  


LONGRANGE parasite chart

 

LONGRANGE IMPORTANT SAFETY INFORMATION: Do not treat within 48 days of slaughter. Not for use in female dairy cattle 20 months of age or older, including dry dairy cows, or in veal calves. Post-injection site damage (e.g., granulomas, necrosis) can occur. These reactions have disappeared without treatment. Not for use in breeding bulls, or in calves less than 3 months of age. Not for use in cattle managed in feedlots or under intensive rotational grazing. Pregnant women should wear gloves and exercise caution or avoid handling this product.

 

For more information, including full prescribing information, visit https://bit.ly/LongRangePI or call 888-637-4251.

Dosage & Administration

LongRange dosing guidelines chart.

 

LongRange applicator

 

Only use polypropylene type syringe.

Resources

Extended Release Eprinomectin Study

MSDS (PDF)
Label (PDF)

 

LONGRANGE IMPORTANT SAFETY INFORMATION: Do not treat within 48 days of slaughter. Not for use in female dairy cattle 20 months of age or older, including dry dairy cows, or in veal calves. Post-injection site damage (e.g., granulomas, necrosis) can occur. These reactions have disappeared without treatment. Not for use in breeding bulls, or in calves less than 3 months of age. Not for use in cattle managed in feedlots or under intensive rotational grazing. Pregnant women should wear gloves and exercise caution or avoid handling this product.

Safety

CAUTION: Federal law restricts this drug to use by or on the order of a licensed veterinarian.
 

LONGRANGE IMPORTANT SAFETY INFORMATION: Do not treat within 48 days of slaughter. Not for use in female dairy cattle 20 months of age or older, including dry dairy cows, or in veal calves. Post-injection site damage (e.g., granulomas, necrosis) can occur. These reactions have disappeared without treatment. Not for use in breeding bulls, or in calves less than 3 months of age. Not for use in cattle managed in feedlots or under intensive rotational grazing. Reproductive and developmental toxicities have been reported in laboratory animals following high, repeated exposures to N-methyl-2- pyrrolidone (NMP). Pregnant women should wear gloves and exercise caution or avoid handling this product. The Safety Data Sheet (SDS) contains more detailed occupational safety information.

Panoramic view of lush green hills with the text 'We're Built For Out Here.
Panoramic view of lush green hills with the text 'We're Built For Out Here.

Top Reasons to Use LONGRANGE® (eprinomectin)

1. FIRST AND ONLY EXTENDED-RELEASE INJECTABLE DEWORMER.

LONGRANGE offers up to 150 days1 of control for the most economically devastating internal and external parasites. LONGRANGE outlasts the limited, two- to 42-day protection of conventional dewormers,2 thanks to THERAPHASE® extended-release technology. 

 

2. SUPPORTS GREATER AVERAGE DAILY GAINS. 

In a published study, researchers found that yearling cattle treated with LONGRANGE had 11% higher average daily gains than those treated with topical ivermectin.3  Learn more

 

3. LEADS TO MORE SUCCESSFUL REPRODUCTION. 
LONGRANGE dewormer reduces parasite pressure, increases pregnancy rates and shortens calving intervals, meaning more calves are born earlier — giving them more time to gain weight before sale day.4   Learn more

 

4. BETTER RETURNS ON SALE DAY.
With greater weight gain, LONGRANGE is a proven investment that delivers a better return per head, whether your operation is large or small. Use the Investment Calculators below to highlight your potential return, in both dollars and pounds.3,4 

Gain the freedom to roam confidently

For up to 150 day of control on pasture, veterinarian Holly Roe-Johnson and cattle ranchers Ross and Reece Wientjes in Mound City, SD, reach for LONGRANGE® (eprinomectin) extended-release dewormer. See how confidence in their herd has paid off in pounds. 

Trust in THERAPHASE® technology to deliver lasting protection.

The initial subcutaneous injection of LONGRANGE dewormer allows the eprinomectin to reach a high peak to control parasites right away. From there, THERAPHASE encapsulates the remaining eprinomectin and continues releasing it above therapeutic levels, with a second peak reached approximately 70–100 days after the initial injection. 
 
Watch the video to learn how to properly administer the injection and to see in depth how LONGRANGE delivers extended protection.

LONGRANGE IMPORTANT SAFETY INFORMATION:

Do not treat within 48 days of slaughter. Not for use in female dairy cattle 20 months of age or older, including dry dairy cows, or in veal calves. Post-injection site damage (e.g., granulomas, necrosis) can occur. These reactions have disappeared without treatment. Not for use in breeding bulls, or in calves less than 3 months of age. Not for use in cattle managed in feedlots or under intensive rotational grazing. Pregnant women should wear gloves and exercise caution or avoid handling this product.

Tablet displaying LongRange investment calculator results for cattle herd size and net return.

Confidence starts with a proven investment.

Use the calculators below to see how much you could gain by protecting your cattle 
with LONGRANGE.

 

Calculate for Cow Calf >

 

Calculate for Stocker >

Confidence starts with a proven investment.

Use the calculators below to see how much you could gain by protecting your cattle 
with LONGRANGE.

 

Calculate for Cow Calf >

 

Calculate for Stocker >

Tablet displaying LongRange investment calculator results for cattle herd size and net return.

Sustainable Deworming

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Diagnostics 
Monitor deworming efficacy with ongoing surveillance and routine diagnostic testing.

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Combination Treatment

Using two or more dewormers from different drug classes with different modes of action to reduce the amount of parasite survivors.

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Refugia

Portion of the parasite population not exposed to selection pressure. Parasites are left in "refuge" from the dewormer. Consult with your veterinarian.

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Management

Forage height, pasture management, stocking density, overgrazing and rotation impact deworming programs.

References

1Dependent upon parasite species, as referenced in FOI summary and LONGRANGE product label.

2 Safe-Guard Drench, Generic Ivermectin 1% Pour-On, Generic Ivermectin 1% Injectable and Dectomax 1% Injectable product labels.

3 Rademacher RD, Behlke EJ, Parr SL, et al. An evaluation of eprinomectin extended-release injectable (LONGRANGE®) on the performance of yearling cattle on pasture in western Canada. Bov Pract 2018;52(1):46–52.

4 Andresen CE, Loy DD, Brick TA, Gunn PJ. Case study: Effects of extended-release eprinomectin on cow-calf performance and reproductive success in a fall-calving beef herd. Prof Anim Sci 2018;34(2):223–229.

 

Trademarks

LONGRANGE®, THERAPHASE® and the Cattle Head logo® are registered trademarks of Boehringer Ingelheim Animal Health USA Inc. All other trademarks are the property of their respective owner. ©2025 Boehringer Ingelheim Animal Health USA Inc., Duluth, GA. All rights reserved. 

US-RUM-0085-2025