Jeffers (1.87% Ivermectin) Horse Wormer, Single Dose

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Jeffers (1.87% Ivermectin) Horse Wormer, Single Dose

Jeffers Ivermectin (1.87%) effectively controls gastrointestinal nematodes & bots. Ivermectin offers broad spectrum control and kills internal parasites with a 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 (87)

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  1. 5.0 out of 5 stars

    "Jeffers I vermectin "

    Keep up these great products that work πŸ‘

  2. 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.

  3. 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 πŸ’“ πŸ’“

  4. 5.0 out of 5 stars

    "Ivermectin "

    Just love Jeffers.! They are always thinking of a better way for their customers to be able to keep their horses in a low cost maintenance with great products. Thanks Jeffers.

  5. 5.0 out of 5 stars

    "Great price"

    Best price for regular ivermectin around

  6. 5.0 out of 5 stars

    "Great Product"

    Great wormer and easy on the pocket

  7. 5.0 out of 5 stars



  8. 5.0 out of 5 stars


    Great prices at Jeffers!

  9. 5.0 out of 5 stars

    "Good proven wormer "

    Have used these for years. Swap these out with other types of wormers. Can't bet the price. Horses stay healthy. From the minis to the horses.

  10. 5.0 out of 5 stars


    We use this every year. It's affordable and my horses stay sleek and shiny. They don't even mind the taste.

  11. 5.0 out of 5 stars

    "Excellent wormer."

    Effective and with 25 plus shire horses its very affordable.

  12. 5.0 out of 5 stars

    "Good product "

    This dewormer is cheap, relatively safe and effective!

  13. 5.0 out of 5 stars

    "Great product, great price"

    Love the fact that I'm getting the same quality without paying the extra for a name brand.

  14. 5.0 out of 5 stars

    "Jeffers Ivermec paste"

    I have been using this as my main wormer for my cows, horses and dogs. Even a goat that would stop in now and again. Took some to a friend and wormed their sheep, goats, and chickens by squirting wormer on bread pieces. Use high fat horse feed when I worm the cows and horses with it. Squirt on my finger to worm the dog monthly, as it is the wormer and the heart worm medicine all in one. Nary have I had a dog with a cough and the die in their mid teens, so I must keep it here at all times. TYou

  15. 5.0 out of 5 stars


    Great product! Works fabulously and you can't beat the price! Shipping is quick and ordering is easy! Highly recommended! We've been using this wormer for years and we run anywhere between 18-30 headed horses. Thanks Jeffers!

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