Legendary dewormers demand a legendary approach. At Boehringer Ingelheim, these Four Pillars guide a smarter, more sustainable parasite-control strategy for cattle.
Cattle dewormers for proven parasite control
There are a lot of cattle dewormers out there. These six have proven themselves in the pasture and herds for decades. Here, there's no room for anything less than legendary.
The Four Pillars of sustainable deworming
Diagnostics
Monitor deworming efficacy with ongoing surveillance and routine diagnostic testing.
Combination Treatment
Use two or more dewormers from different drug classes with different modes of action to reduce the amount of parasite survivors.
Refugia
A portion of the parasite population not exposed to selection pressure. Parasites are left in “refuge” from the dewormer. Consult with your veterinarian.
Management
Forage height, pasture management, stocking density, overgrazing and rotation impact deworming programs.
Supporting sustainable parasite control in cattle
Hardworking dewormers are only part of the equation. Long-term parasite control depends on how they’re put to work. And don’t just take our word for it. Hear from experienced producers and veterinarians as they discuss what sustainable parasite control really takes in Out Here with the Legends.
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.
EPRINEX IMPORTANT SAFETY INFORMATION: 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 reactions, including fatalities in dogs, may result.
SYNANTHIC RESIDUE WARNINGS: Cattle must not be slaughtered until seven days after treatment. Because a withdrawal time in milk has not been established, do not use in female dairy cattle of breeding age.
IVOMEC PLUS IMPORTANT SAFETY INFORMATION: Do not treat cattle within 21 days of slaughter. Do not use in female 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 1% IMPORTANT SAFETY INFORMATION: Do not treat cattle within 35 days of slaughter. Do not use in female 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 IMPORTANT SAFETY INFORMATION: Do not treat cattle within 48 days of slaughter. Do not use in female 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.
References
1 Dependent upon parasite species, as referenced in FOI summary and LONGRANGE product label.
2 Based on EPRINEX label claims and FOI summary.
3 Beckett JL. Efficacy of pour-on dewormers differing in active ingredient and carrier on weight gain and fecal egg count in stocker beef cattle. Agricultural Research Institute, Cal Poly State University. 2001.
4 Prichard RK, Hennessy DR, Steel JW, Lacey E. Metabolite concentrations in plasma following treatment of cattle with five anthelmintics. Res Vet Sci. 1985;39(2) 173–178.
5 Based on IVOMEC Plus label claims and FOI summary.
6 Gadberry S, Pennington J, Powell J. Internal parasites in beef and dairy cattle. University of Arkansas Division of Agriculture, Cooperative Extension Service. 2019. https://dairy-cattle.extension.org/internal-parasites-in-beef-and-dairy-cattle/. Accessed Oct. 31, 2023.
7 Based on IVOMEC 1% label claims.
8 Based on IVOMEC Pour-On label claims.
*Clinical relevance has not been determined.
EPRINEX®, IVOMEC®, LONGRANGE®, SYNANTHIC® and the Cattle Head Logo® are registered trademarks of Boehringer Ingelheim Animal Health USA Inc. ©2026 Boehringer Ingelheim Animal Health USA Inc., Duluth, GA. All rights reserved.
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