November 25, 2019

Three Tips to Get the Most Out of Your Pour-on Dewormer

Develop an effective deworming program that keeps cattle comfortable and reduces resistance

“Let’s face it….We aren’t going to have an unending supply of new molecules and new active ingredients for parasite control,” warned Dr. John Davidson, senior associate director, beef cattle professional services, Boehringer Ingelheim. “That’s why we need to ensure judicious and proper use of the products we have available now — to ensure they maintain their efficacy in the years to come.”

Dr. Davidson said there are several best practices for getting good parasite control from pour-on dewormers:

■  Compare product labels and choose a dewormer that:
○  Controls a broad spectrum of species and stages.
○  Is weather proof, in case it rains following application.
○  Is nonflammable, if you will be branding cattle.

■  Properly administer pour-on dewormer:
○  Ensure facilities are equipped to adequately restrain animals so that there is minimum movement.
○  Determine each animal’s weight, using scales whenever possible.
○  Calculate the volume of pour-on product to be administered based on each animal's weight.
○  Apply the product with an applicator gun along the midline (over the top of the back of each animal). Begin at the withers, and pour all the way down to the tailhead. Make sure the entire dose gets on the animal, not on the sides of the chute or on the handlers.

■  Dosing Done Right
Follow the label. In doing so, you have the greatest likelihood of achieving the appropriate drug levels to kill the parasites. This means that the dosage — or the amount of product applied — is adequate for the size and weight class of the animal being treated.

If you are not applying the right dose, you may be over- or under-dosing:
○  Under-dosing: If an animal is under-dosed, the amount of the product’s active ingredient is not present in the animal’s tissues at the necessary level and the product will not deliver its desired effect. Under-treatment will likely leave some of the parasites behind. That becomes problematic because the surviving parasites are potentially more likely to be resistant to subsequent and future treatments with products in a similar class.
○  Over-dosing: When you over-dose animals, you waste hard-earned dollars on product. Generally, the safety index on this class of products is fairly broad, so toxicities as a result of over-dosing are rare.

Proper dosing ensures that the drug will be available — in the necessary concentration — in the animal’s tissue so it is effective against the species of organisms that it is indicated for. Simply put: You need to deliver enough of the drug to kill the parasites that you’re intending to kill.

©2018 Boehringer Ingelheim Vetmedica, Inc. BOV-1762-ANTH1018


Boehringer Ingelheim
Improving the health and quality of life of patients is the goal of the research-driven pharmaceutical company Boehringer Ingelheim. The focus in doing so is on diseases for which no satisfactory treatment option exists to date. The company therefore concentrates on developing innovative therapies that can extend patients’ lives. In animal health, Boehringer Ingelheim stands for advanced prevention. 

Family-owned since it was established in 1885, Boehringer Ingelheim is one of the pharmaceutical industry’s top 20 companies. Some 50,000 employees create value through innovation daily for the three business areas human pharmaceuticals, animal health and biopharmaceuticals. In 2017, Boehringer Ingelheim achieved net sales of nearly 18.1 billion euros. R&D expenditure, exceeding three billion euros, corresponded to 17.0 per cent of net sales. 

As a family-owned company, Boehringer Ingelheim plans in generations and focuses on long-term success, rather than short-term profit. The company therefore aims at organic growth from its own resources with simultaneous openness to partnerships and strategic alliances in research. In everything it does, Boehringer Ingelheim naturally adopts responsibility towards mankind and the environment. 

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Boehringer Ingelheim Animal Health Business Unit

Boehringer Ingelheim is the second largest animal health business in the world. We are committed to creating animal well being through our large portfolio of advanced, preventive healthcare products and services. With net sales of €3.9 billion and around 10,000 employees worldwide, we are present in more than 150 markets. For more information click here.