Jeffers (Ivermectin) Horse Wormer, Single Dose

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Jeffers (Ivermectin) Horse Wormer, Single Dose

Jeffers Ivermectin (1.87%) is a broad spectrum horse dewormer paste used to aid in the control and treatment of gastrointestinal nematodes and bots. Single Dose Read More

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Featured Advice from Our Experts

What You Should Know About Horse Worms: Treatments, Causes & Info

Common types of worms and a description of each plus what to use to deworm when (printable rotation chart in link at bottom.)


Jeffers Ivermectin (1.87%)

Jeffers Ivermectin (1.87%) effectively controls gastrointestinal nematodes and bots in horses. Regular treatment will reduce the chances of verminous arteritis caused by Strongylus vulgaris. Ivermectin offers broad spectrum control and kills important internal parasites including bots and the arterial stages of S. vulgaris with a single dose. Jeffers Ivermectin is a potent antiparasitic agent that is neither a benzimidazole nor an organophosphate.

All horses should be included in a regular parasite control program with particular attention paid to mares, foals and yearlings. Foals should be treated at 6-8 weeks of age and routine treatment repeated as needed. Consult a veterinarian for a control program to meet specific needs.

Features & Benefits of Jeffers Ivermectin:

  • broad spectrum control - controls 46 species and stages of worms and bots
  • anthelmintic & boticide
  • kills internal parasites
  • new gel formula
  • treats up to 1250 lb body weight

Jeffers Ivermectin Aids in the Control of:

  • large and small strongyles
  • pinworms
  • hairworms
  • threadworms
  • stomach worms
  • lungworms
  • roundworms

Note: May be used in horses of all ages, including mares at any stage of pregnancy. Stallions may be treated without adversely affecting their fertility.

View Jeffers Ivermectin Horse Wormer manufacturer and label information

Any use of a product that is not clearly defined on the label directions should be done only under supervision of a qualified veterinary professional.


  • Brand: Jeffers
  • Active Ingredient: Ivermectin (1.87%)

Reviews (99)

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  1. 5.0 out of 5 stars

    "Horse didn't try to spit it out"

    It's Ivermectin. No reason to buy a name brand if it has the same main ingredient. I just bought it because it was cheap but to my surprise my horses took it no problem. They always try to spit out Equimax and Zimectrin. It doesn't smell as "mediciny" as the otherse either. My goal is not to "torture" them with dewormer so if it's cheap and palatable, I'll be buying this for the annual deworming.

  2. 5.0 out of 5 stars


    Great price for great quality stuff. Will buy again

  3. 5.0 out of 5 stars

    "Best price ever!!"

    We have a number of horses and this is the best price on a quality product.

  4. 5.0 out of 5 stars

    "Very good product and price!"

    Happy with purchase

  5. 5.0 out of 5 stars

    "Horse wormer"

    Ivermectin works great on pastures horses. Price is do reasonable

  6. 5.0 out of 5 stars

    "Jeffers Ivermectin - Great product"

    I have used many different brands of ivermectin over the years and this is by far my favourite. The horses don't mind the taste and the consistency is great - thin enough to dispense easily but thick enough that it stays put.

  7. 5.0 out of 5 stars

    "Wormer necessity"

    the price is great. my husband is a veterinarian and he said it had everything that the horse needed as part of a rotational program

  8. 5.0 out of 5 stars

    "Jeffers horse wormer"

    Excellent product for the price!!! just read the label, same ingredients, at a fraction of the price of the others !!!!

  9. 5.0 out of 5 stars

    "Jeffers Ivermectin"

    I use this every 4 months and rotate with Strongid so I worm every 2 months. The product seems to work well as long as you use it when you are supposed to.

  10. 5.0 out of 5 stars

    "Great product"

    Great price and have been buying it for about 8 years. Jeffers has been wonderful to deal with. Very fast shipping.

  11. 5.0 out of 5 stars

    "Great product for price"

    Great price on this product. I use it on all of my livestock. sheep, goats, donkeys, horses, camel... Why pay 3-4 times more for this product just to have another name on the label...

  12. 5.0 out of 5 stars


    Great product at great price

  13. 5.0 out of 5 stars

    "Jeffers I vermectin "

    Keep up these great products that work 👍

  14. 5.0 out of 5 stars

    "Circle R Farms "

    I have used this wormer for SHEEP & GOATS for several years, it is not labelled for either, i have never had a reaction, and it does a really good job, for a full grown animal i use the whole tube.

  15. 5.0 out of 5 stars


    Your horse wormer is just the best. Every bit as good as the high priced stuff we get up here in Canada. Thanks for shipping 💓 💓

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