Panacur Powerpac Paste Dewormer

Item# 2510P
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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 69 reviews)

Chuluota , FL
February 08, 2018
"Always works great, improves horses over all appearance and health. "
September 30, 2017
"Easy too administer and can dose more than one horse per tube depending on the size. "
June 07, 2017
"Excellent product at an affordable price. Will order again."
May 30, 2017
"Great product! Perfect for those horses who just need that extra boost for weight, shedding, or you suspect worms! I've always had great luck with this product!"
Union Grove, WI
January 16, 2017
"I rehab horses from the starved to emotional issues. When the starved come in after putting on at least 100 lbs I always use a power pack on them. It helps get their gut working better making sure any worms that are also fed are gone. Manure consistency changes for the better by the 5th day of using. Love how fast the shipping is."