March 9, 2015

Treating Parasites at Spring Turnout with Extended-Release Parasite Control Can Improve Beef Producers’ Return on Investment

New data shows heifers and calves treated with LONGRANGE® (eprinomectin) yield higher ADG than those treated with conventional dewormers.

As spring turnout approaches, the worrisome topic of parasite control starts dominating beef producers’ thoughts, because parasite larvae from last season are waiting to infect cattle as soon as they are turned out onto pasture. To break that cycle of parasite infection and reinfection, it takes about 100 days of continuous control.1,2

That’s why many producers are turning to LONGRANGE® (eprinomectin), the first extended-release injectable cattle dewormer that provides cattle producers season-long persistent parasite control.3

Additionally, LONGRANGE has been proven to positively impact Average Daily Gains (ADGs).

Throughout the 2013 grazing season, 15,205 steer and heifer stocker calves in nine states across 18 U.S. locations – representing a cross-section of grazing environments and pastures – were studied to determine the effect on average daily gains (ADGs) of pens of cattle subjected to a single dose, except where noted, of LONGRANGE compared to other common deworming practices.4

The study proved that cattle treated once with LONGRANGE had a significantly higher ADG (P<0.01) than cattle treated with conventional dewormers.4 This study included individual comparisons against conventional dewormers in the following combinations:

  • DECTOMAX or IVOMEC® (ivermectin) 1% Injection*
  • IVOMEC or generic ivermectin pour-on*
  • CYDECTIN® (moxidectin) + SAFE-GUARD® (fenbendazole) + generic ivermectin (x2)
  • DECTOMAX + SAFE-GUARD + generic ivermectin (x2)
  • VALBAZEN® (albendazole) + IVOMEC® (ivermectin) Pour-On for Cattle

*According to local practice/label

And recently, Merial announced its Spring Challenge, where producers can recoup costs of using LONGRANGE if their cattle don’t gain weight. Producers must purchase and treat their cows, calves or stockers with LONGRANGE between Jan. 1, 2015 – Dec. 31, 2015. If cattle do not gain weight, or demonstrate better performance versus a comparison group using any other parasiticide or parasiticide combination**, Merial will compensate the producer with a Merial Brand Product of their choice to cover the cost of LONGRANGE used.***

If producers are not ready to step up to LONGRANGE, they can still take the challenge with EPRINEX® (eprinomectin) or any IVOMEC Brand Product.

“The time of year when grazing season begins, age and category of the animals, type of operation and grazing history of the pasture are all considerations to discuss with a veterinarian,” says Joe Dedrickson, DVM, Ph.D., Merial, Inc.

LONGRANGE is able to provide extended protection all season long as a result of its unique THERAPHASE™ Technology, a formulation that allows the dewormer to go to work immediately and continue to work up to 150 days, dependent on parasite species.3, 5

LONGRANGE is available through a prescription from a veterinarian.

**As described in the full LONGRANGE Challenge details.

***LONGRANGE is a prescription product and must be shipped to your veterinarian for you to receive.

About Merial

Merial is a world-leading, innovation-driven animal health company, providing a comprehensive range of products to enhance the health, well-being and performance of a wide range of animals. Merial employs approximately 6,200 people and operates in more than 150 countries worldwide with close to €2 billion of sales in 2013. Merial is a Sanofi company. For more information, please see

®LONGRANGE, EPRINEX and IVOMEC are a registered trademarks and ™THERAPHASE is a trademark of Merial. All other marks are the property of their respective owners. ©2015 Merial, Inc., Duluth, GA. All rights reserved. RUMIELR1525 (02/15)


LONGRANGE: 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.

IVOMEC 1%: Do not treat cattle within 35 days of slaughter. Do not use in dairy cattle of breeding age or in veal calves. Do not treat swine within 18 days of slaughter. Do not use in other animal species not on the label as severe adverse reactions, including fatalities in dogs, may result.

IVOMEC Pour-On: Do not treat cattle within 48 days of slaughter. Do not use in dairy cattle of breeding age or in veal calves. Do not use in other animal species not on the label as severe adverse reactions, including fatalities in dogs, may result.

IVOMEC Plus: Do not treat cattle within 21 days of slaughter.

EPRINEX: EPRINEX Pour-On for Beef and Dairy Cattle: No meat or milk withdrawal is required when used according to label. Do not use in calves intended for veal or unapproved animal species as severe adverse reaction, including fatalities in dogs, may result.

1 Morley FH, Donald AD. Farm management and systems of helminth control. Vet Parasitol. 1980;6:105-134.

2 Brunsdon RV. Principles of helminth control. Vet Parasitol. 1980;6:185-215.

3 LONGRANGE product label.

4 Data on file at Merial.

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