LongRange® (eprinomectin)

An injectable dewormer that delivers up to 150 days of parasite control in a single dose1


LONGRANGE® is the first injectable dewormer that delivers up to 150 days of extended-release parasite control with just one convenient dose. It lasts longer and works harder than any other dewormer on the market to control parasite resistance in your herd one season to the next.

For more information, visit theLONGRANGElook.com.

Features & Benefits

Better Control, Better Feed Conversion.

  • Conventional dewormers only offer treatment for 2 to 42 days.2

    • Safe-Guard® (fenbendazole) 10% Suspension: 2 Days

    • Dectomax® (doramectin) Injectable: Up to 21 Days

    • Cydectin® (moxidectin) Injectable: Up to 42 Days

    • LongRange® (eprinomectin) Injectable: Up to 150 Days

  • Unique Theraphase® formulation powers LONGRANGE® for up to 150 days.1

  • Controls parasites on a short- and long-term basis in a single treatment.

  • The only seasonal dewormer with effective plasma levels that remain up to 150 days.1

  • More control means less parasite impact, and more weight to market.

Works when you need it most.

  • Larvae levels peak weeks after conventional dewormers have quit completely, often requiring multiple treatments.

  • LONGRANGE® helps grazing cattle avoid infection during and throughout the period of peak larvae buildup.

Dosage & Administration

Dosage Information

  • Prescription product to be administered subcutaneously at 1 mL/110 pounds.

  • Available in 100-, 250- and 500-mL bottle sizes (plastic bottle protectors included with 250 and 500mL sizes).


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.

LongRange - Worth its weight in pounds
LongRange - Worth its weight in pounds

Longer Parasite Control. More Parasites.

LONGRANGE® is the first and only dewormer to control a broad spectrum of parasites from 100 up to 150 days, including the Brown Stomach Worm and Barber’s Pole Worm.

LongRange Duration Graph
LongRange Duration Graph

A Proven Investment That Pays Off

When you provide some basic information about your herd, the Investment Calculator delivers a detailed estimate on what you can expect to gain by using LONGRANGE®.

LongRange Investment Calculator

Gain During Grazing Season

How does season-long parasite control affect herd performance and profitability? James Seaton, DVM, of Seaton Veterinary Clinic in Denison, Iowa, discusses the economic benefits of deworming with LONGRANGE®.


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

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


LONGRANGE®, THERAPHASE® and The Cattle Head Logo® are registered trademarks of Boehringer Ingelheim Animal Health USA Inc. All other marks are property of their respective owners. ©2021 Boehringer Ingelheim Animal Health USA Inc., Duluth, GA. All Rights Reserved. US-BOV-0312-2021