IVOMEC® (ivermectin)

Effective dewormers with broad-spectrum control
 

Details

IVOMEC® Plus (ivermectin and clorsulon): Take advantage of two active ingredients — ivermectin and clorsulon — that are combined to control more than 30 species and stages of external and internal parasites, including adult liver flukes.1

 

IVOMEC® (ivermectin) 1% Injection is the first cattle parasiticide approved by the FDA on the market. Using it with your herd can enhance your profitability by controlling the damage from over 30 species and stages of internal and external parasites.2,3

 

IVOMEC® Pour-On (ivermectin topical solution): For more than 35 years, IVOMEC® Pour-On has controlled over 30 species and stages of internal and external parasites.4 With excellent control of mange and lice, it’s the trusted choice for a topical ivermectin solution.

Features & Benefits

IVOMEC® Plus (ivermectin and clorsulon), IVOMEC® (ivermectin) 1% Injection and IVOMEC® Pour-On (ivermectin topical solution) provide time-tested, broad-spectrum control in three unique formulations.

IVOMEC Plus + IVOMEC 1%

Chart showing parasites that IVOMEC Plus + IVOMEC 1% addresses. INTERNAL PARASITE SPECIES: Brown stomach worm Ostertagia ostertagi; Brown stomach worm (inhibited); Ostertagia lyrata; Barber's pole worm Haemonchus placei; Hookworm Bunostomum phlebotomum; Twisted wireworm Nematodirus helvetianus; Nematodirus spathiger; Nodular worm Oesophagostomum radiatum; Lungworm Dictyocaulus viviparus; Small intestinal worm Cooperia oncophora; Small intestinal worm C. punctata; Cooperia pectinata; Hairworm T. axei; Trichostrongylus colubriformis; Liver fluke Fasciola hepatica (IVOMEC® Plus Only) EXTERNAL PARASITE SPECIES: SUCKING LICE — Short-nosed cattle louse, Haematopinus eurysternus; Long-nosed cattle louse, Linognathus vituli; Small blue louse, Solenopotes capillatus; Biting louse, Damalinia bovis. MANGE — Mange mite, Sarcoptes scabiei, Psoroptes ovis. GRUBS — Northern cattle grub - Ist instar Hypoderma bovis; Northern cattle gru b - 2nd instar; H. bovis; Northern cattle grub - 3rd instar; H. bovis; Common cattle grub - Ist instar; H. lineatum; Common cattle grub - 2nd instar; H. lineatum; Common cattle grub - 3rd instar; H. lineatum.

 

IVOMEC Pour-On

 

Ivomec Pour On Applicator 80-ML
Dosage & Administration

IVOMEC® Plus + IVOMEC® 1%

DOSING GUIDELINES for IVOMEC PLUS IVOMEC 1% Animal Weight: Product Volume 220lbs.: 2mL 660 lbs.: 6 mL 1,100 lbs.: 10 mL Give 1 mL of IVOMEC Plus or IVOMEC 1% for every 110 lbs. of body weight NUMBER OF ANIMALS TREATED PER BOTTLE Animal Weight: Package Size — # head 220 lbs. (2 mL dose): 50 mL* — 25 head; 660 lbs. (6 mL dose): 50 mL* — 8 head; 1,100 Ibs. (10 mL dose): 50 mL* — 5 head 220 lbs. (2 mL dose): 500 mL — 250 head; 660 lbs. (6 mL dose): 500 mL — 83 head; 1,100 Ibs. (10 mL dose): 500 mL — 50 head 220 lbs. (2 mL dose): 1 L — 500 head; 660 lbs. (6 mL dose): 1 L — 166 head; 1,100 Ibs. (10 mL dose): 1 L — 100 head *IVOMEC 1% Only

IVOMEC Pour-On

Resources

SDS

IVOMEC®  Pour-On (PDF)
IVOMEC®  Plus (PDF)
IVOMEC®  1% Injection (PDF)

Labels

IVOMEC®  Pour-On (PDF)
IVOMEC®  Plus (PDF)
IVOMEC®  1% Injection (PDF)

Other Resources

Deworming Legends Comparison Chart Detailer

Pour-On and Injectables Comparison Charts
Safety

Important Safety Information


IVOMEC® Plus: 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%: 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: 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. 

IVOMEC® (ivermectin) 1% Injection has been authorized by FDA under an Emergency Use Authorization for the prevention of infestations caused by New World screwworm larvae in cattle.  Ivomec 1% Injection is authorized only for the duration of the emergency declaration unless terminated or revoked sooner. Ivomec 1% Injection is not approved for this use. Click here for more information.

Three Ivomec boxes: 1000 mL, 500 mL and 50 mL

Emergency Use Authorization for IVOMEC® 1% dewormer for New World screwworm (NWS)

The U.S. Food and Drug Administration (FDA) has issued an Emergency Use Authorization (EUA) for the emergency use of the approved product IVOMEC® (ivermectin) 1% Injection for the prevention of infestations caused by New World screwworm (Cochliomyia hominivorax) larvae (myiasis) when administered within 24 hours of birth, or at the time of castration or the appearance of a wound in cattle, except for female dairy cattle producing milk for human consumption and calves that will be processed for veal.5 IVOMEC 1% Injection is not approved or conditionally approved for this use.

 

IVOMEC 1% Injection is approved for other uses. For additional information on the EUA, please refer to the IVOMEC 1% Injection NWS Fact Sheet and Prescribing Information.

Emergency Use Authorization for IVOMEC® 1% dewormer for New World screwworm (NWS)

The U.S. Food and Drug Administration (FDA) has issued an Emergency Use Authorization (EUA) for the emergency use of the approved product IVOMEC® (ivermectin) 1% Injection for the prevention of infestations caused by New World screwworm (Cochliomyia hominivorax) larvae (myiasis) when administered within 24 hours of birth, or at the time of castration or the appearance of a wound in cattle, except for female dairy cattle producing milk for human consumption and calves that will be processed for veal.5 IVOMEC 1% Injection is not approved or conditionally approved for this use.

 

IVOMEC 1% Injection is approved for other uses. For additional information on the EUA, please refer to the IVOMEC 1% Injection NWS Fact Sheet and Prescribing Information.

Three Ivomec boxes: 1000 mL, 500 mL and 50 mL

Additional information on New World screwworm:

Ivomec products lineup for cattle, featuring ivermectin solutions in different formats, with the slogan 'A Lineup for the Ages.
Ivomec products lineup for cattle, featuring ivermectin solutions in different formats, with the slogan 'A Lineup for the Ages.

Top Reasons to Use IVOMEC Plus (ivermectin and clorsulon):

  1. Proven protection with trusted ingredients 
    IVOMEC® Plus combines ivermectin and clorsulon to deliver broad-spectrum control against adult liver flukes and more than 30 species and stages of internal and external parasites.1 
     
  2. Backed by performance 
    In beef steers, IVOMEC Plus has been shown to improve feed conversion, delivering a higher average daily gain of 0.23 lb/head/day and a total weight gain advantage of 28.5 pounds compared with treatment for roundworms and external parasites alone.6 
     
  3. Kills more stages and species of parasites than Valbazen® (albendazole oral suspension) 
    IVOMEC Plus controls more than 30 stages and species of parasites, and is also safe for use during all stages of pregnancy.1 Valbazen® is not safe for use in pregnant cows within the first 45 days of pregnancy.7

Life Cycle of Liver Flukes

Life cycle of live flukes chart

Top Reasons to Use IVOMEC 1% Injection (ivermectin):

  1. Broad-spectrum control = better performance

    IVOMEC 1% Injection dewormer effectively controls more than 30 species and stages of internal and external parasites, including the brown stomach worm, lungworm, barber’s pole worm and sucking lice.7 Using it in your herd can enhance your profitability by controlling these damaging parasites.2,3

     

  2. Time-tested

    The IVOMEC family of deworming products has been used by beef cattle producers for 40 years. IVOMEC 1% Injection is the first cattle parasiticide approved by the FDA on the market.

Top Reasons to Use IVOMEC Pour-On (ivermectin topical solution):

  1. Excellent mange and lice control
    IVOMEC Pour-On protects against over 30 species and stages of internal and external parasites. It also offers up to 56 days of control of biting lice.4
     
  2. Improves cattle performance
    When left untreated, parasites suppress appetite, reduce feed intake and negatively impact the animal’s immune system. Using IVOMEC brand products can enhance your profitability by controlling these damaging parasites.2

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

1 Based on IVOMEC Plus label claims and FOI summary.

2 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.

3 Based on IVOMEC Pour-On label claims.

4 Marley SE, Corwin RM, Hutcheson DP. Effect of Fasciola hepatica on productivity of beef steers from pasture through feedlot. Agri-Pract 1996;17:18–23.

5 US Food and Drug Administration. Fact Sheet: Emergency Use Authorization of Ivomec (ivermectin) Injection for New World Screwworm (NWS). Accessed February 5, 2026.

6 Valbazen 11.36% Drench product label.

7 Based on IVOMEC 1% Injection label claims.

Trademarks

IVOMEC® 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. ©2026 Boehringer Ingelheim Animal Health USA Inc., Duluth, GA. All rights reserved.

US-RUM-0084-2025-V2