Merck Panacur Powerpac Paste Dewormer

Item# 2510P
$69.95 - $72.95
Qualifies for FREE standard shipping on orders over $70
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Panacur Powerpac Paste 10% by Merck. The only FDA approved treatment for all stages of encysted small strongyles in horses. Widely recognized as the best treatment option for ascarids, including ivermectin-resistant ascarids. Often recommended once a year for young horses and moderate to high egg shedders; new horses to the farm before co-mingling; before starting horses on a daily dewormer; prior to weaning foals. Extremely safe - for every horse regardless of age, size or body condition; the environment and for use around other animals.

Can be used in foals, pregnant mares, older horses, thin, underweight or miniature horses. Safe for the environment and safe around other farm animals and pets.

Product Details:

  • Contains 100 mg/gm of Fenbendazole
  • Apple-cinnamon flavored
  • One tube treats up to 1250 lb horse
  • 5 syringes in pack - each syringe is 57 gm


  • Large strongyles
  • Encysted early third stage, late third stage and forth stage cyathostome larvae
  • Small strongyles
  • Pinworms
  • Ascarids (Roundworms)
  • Arteritis caused by forth stage larvae of Strongylus vulgaris in horses.

Read manufacturers instructions for complete information regarding use and dosing.

Click here to read our deworming guide


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Customer Reviews

Average Rating:

(based on 88 reviews)

White Hall, MD
February 01, 2021
"2 horses were getting gas colic, frequently, and the Vet said it could be encysted strongyles. These 2 horses are much better now after completing the 5 pac. You need to use the 5 pac, not just one tube. 1 tube 5 days in a row. Makes a huge difference. "
North Hero, VT
January 17, 2021
"Love this wormer! Came quickly."
Suffolk, VA
November 30, 2020
"Works great on my Dromedary Camels. 1 big dose does it every time. Very few times I have to repeat. "
August 03, 2020
"Bought this for my unhandled mustang and he ate it mixed in so feed and even liked it. Best part is a have a weanling coming in a couple months and have enough to do the 5 day dosing with her as well."
July 27, 2020
"Excellent wormer. Every horse that is new to our stable we run a powerpac through."