Jeffers® Ivermectin Horse Wormer, Single Dose

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Jeffers® Ivermectin Horse Wormer, Single Dose

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Jeffers® Ivermectin Paste (1.87%) effectively controls gastrointestinal nematodes and bots in horses. Ivermectin offers broad spectrum control and kills internal parasites with a single dose. Read More

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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 Horse Wormer

Jeffers® Ivermectin Paste (1.87%) effectively controls gastrointestinal nematodes and bots of 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 Paste 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 vet for a control program to meet specific needs.

Jeffers® Ivermectin Key Benefits:

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

Jeffers® Ivermectin Horse Wormer is used to aid 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 manufacturer and/or label information


  • Brand: Jeffers
  • Form: Paste
  • Active Ingredient: Ivermectin

Reviews (37)

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  1. 5.0 out of 5 stars

    "Miniature Horses"

    Great Wormer use it all the time for my Miniature Horses!

  2. 5.0 out of 5 stars

    "new apple gel ivomectin"

    Works great on my horse and goats. Horse has no problem with this worm.

  3. 5.0 out of 5 stars

    "Ivermectin horse wormer"

    Prompt delivery, great price especially owning four horses that counts!

  4. 5.0 out of 5 stars

    "Boer Goats Ranch"

    We use this to worm our goats and give it to our mature goats every thirty days. It keeps them worm free.

  5. 5.0 out of 5 stars

    "Great price for wormer"

    My horses always tried to spit out any kind of wormer, so this new gel is no different than any other brands - I have learned to overcome my horses' objections. Great price for an effective treatment.

  6. 5.0 out of 5 stars

    "Great price! "

    This is my go to ivermectin. Easy to use, great price.

  7. 5.0 out of 5 stars

    "Great product for price"

    Ivermectin 1.87% is Ivermectin 1.87% no matter what the pretty box looks like or who makes it. Jeffers ivermectin 1.87% is the same as other brands, just much more affordable when you have several animals that need deworming.

  8. 5.0 out of 5 stars

    "Works for me (them!)"

    They say our horses are becoming resistant ( well, the worms are) to this product but it seems to work for me at my place. Horses seem as healthy as they could possibly be. I do rotate wormers.

  9. 5.0 out of 5 stars

    "jeffers wormer"

    Easy to use, put along side of cheek and teeth. This way the tongue can't easily spit out, and it will spread more around the mouth. If you immediately push the head up in the air they cannot mouth as easily.

  10. 5.0 out of 5 stars

    "Works for Mine"

    I have three horses that have used this product in original form and now the gel. I just mixed a little less than 1/2 cup of plain applesauce with it stir it good and mix it with small amount of their grain and they eat all of it ; will continue using it

  11. 5.0 out of 5 stars


    The new gel is horrible they spit it out. What a mess. such a shame they have to mess with a proven good thing.

  12. 5.0 out of 5 stars

    "Gel wormer is not good"

    I have bought Jeffers ivermectin for years. The new gel is not good. I have multiple horses who can spit it out. Horses who have never offered to spit out wormer spit this out. So having to buy 2 wormers to get one horse wormed is not a good plan. Now I can't tell if they are getting the wormer swallowed or not. This is not a step forward.

  13. 4.0 out of 5 stars

    "Syringe too long for someone with small hands+"

    My horses and I like the new gel. The syringe seems longer than the old one. I have small hands and it is difficult to use for 2 of my 9 horses who hate to be wormed.

  14. 1.0 out of 5 stars

    "new gel formula is a step backwards"

    The only complaint I have is new gel doesn't stick. I did two horses and both spit it out. It was a waste of time and money. I will not purchase this product, in the gel form again.

  15. 5.0 out of 5 stars


    I have many horses, big, and the miniatures, plus have foals now and then, have used this wormer for years with good results. What I do is have the grain in the can add the wormer and mix it good-then pour into the feed bucket and they eat it all gone.As I had some horses that did not like it in the mouth,so I do it this way and no problem--had horses over 45 years. good luck

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