Eprinex® (eprinomectin)

Deadly effective pour-on dewormer for internal and external parasite control


EPRINEX Pour-On is indicated for the treatment and control of gastrointestinal roundworms (including inhibited Ostertagia ostertagi), lungworms, grubs, sucking and biting lice, chorioptic and sarcoptic mange mites, and horn flies in beef and dairy cattle of all ages*, including lactating dairy cattle.

Visit US.EPRINEX.com to learn more.

*Not for use in calves intended for veal.

Features & Benefits

  • Convenient for processing cattle on arrival.

  • Nonflammable, weatherproof formula works even on long, wet hair coats.

  • No milk withholding or meat withdrawal.

  • Only product that controls both Psoroptes and Sarcoptes mange mites as well as lice and horn flies.

  • Safe for pregnant, lactating and dry cows; calves* and heifers; steers and bulls.

    *Not for use in calves intended for veal.

EPRINEX is effective in the removal and control of the following parasites in cattle:

Gastrointestinal Roundworms:
Haemonchus placei  (adults and L4), Ostertagia ostertagi  (including inhibited L4, adults and L4), Trichostrongylus axei  (adults and L4), Trichostrongylus colubriformis  (adults and L4), Trichostrongylus longispicularis  (adults only), Cooperia oncophora  (adults and L4), Cooperia punctata  (adults and L4), Cooperia surnabada  (adults and L4), Nematodirus helvetianus  (adults and L4), Oesophagostomum radiatum  (adults and L4), Bunostomum phlebotomum  (adults and L4), Strongyloides papillosus  (adults only), Trichuris  spp. (adults  only)

Lungworms:Dictyocaulus viviparus  (adults and L4)

Cattle Grubs (all parasitic stages):Hypoderma lineatum, Hypoderma bovis

Lice:Damalinia bovis, Linognathus vituli, Haematopinus eurysternus, Solenopotes capillatus

Mange Mites:Chorioptes bovis, Sarcoptes scabiei

Horn Flies:Haematobia irritans

Dosage & Administration


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.

Eprinex Deadly Effective
Eprinex Deadly Effective
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Top Reasons to Use EPRINEX

  • EPRINEX is deadly effective.

    • EPRINEX kills 39 key species and stages of internal and external parasites, with 99.9 percent efficacy.1

  • You need parasite control you can count on.

    • EPRINEX has a 100 percent product satisfaction guarantee. If you aren’t completely satisfied, we’ll make it right.

  • EPRINEX is safe for all ages and stages.

    • EPRINEX is safe for calves,* heifers, bulls, and pregnant or open cows with no meat or milk withhold.

      *Not for use in calves intended for veal.

  • Provide your herd with more comfort and while gaining milk production.

    • External parasites make cows uncomfortable, which can lead to weight loss and decreased milk production. Animals treated with EPRINEX at calving showed a consistent increase in daily milk production of 2.07 pounds per day in the first six months of lactation compared to the placebo group (P < 0.002).2

  • Because deworming should be this easy.

    • The odor-free, pour-on formulation is convenient, and even works in the rain, heat or freezing cold.

Brightcove Video
Eprinex Dairy Administration Video

How to administer EPRINEX Pour-On

Learn how to properly administer EPRINEX in a step-by-step video.

Advance Deworming

As parasites evolve, so has deworming. It’s not enough to focus on production goals — although that’s important. Now we must develop a system that will be sustainable for the generations that follow. That means using the right products at the right time for the right reasons. And it starts right here.


1. Based on FOI summaries and label claims.

2. Nødtvedt A, Conboy G, Doohoo I, et al. Increase in milk yield following eprinomectin treatment at calving in pastured dairy cattle. Vet Parasitol 2002;105(3):/191—206.


EPRINEX® and The Cattle Head Logo® are registered trademarks of Boehringer Ingelheim Animal Health USA Inc. ©2021 Boehringer Ingelheim Animal Health USA Inc., Duluth, GA. All Rights Reserved.