Horse Tack Review

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Horse Dewormer Products

Equine tapeworms are a serious health threat for horses across the country. Fortunately, Pfizer Animal Health’s Equimax™ (ivermectin 1.87%/praziquantel 14.03%) dewormer provides protection against all major equine parasites, including tapeworms. Equimax also safely offers a critical defense for stallions, mares and foals.

In fact, Equimax is the only combination dewormer, with tapeworm control, approved as safe in breeding, pregnant and lactating mares, as well as stallions and foals as young as four weeks of age. Designed as a key element in an effective rotational deworming program, the apple-flavored Equimax paste provides owners and managers with a highly effective product from a trusted name in equine health.

“Equimax’s safety is unparalleled, even for stallions, mares and young foals,” said Kristin Ruff, Equine Products Manager at Pfizer Animal Health. “It’s a dewormer owners can give with confidence, knowing it’s backed by Pfizer Animal Health.”

Equimax provides not only a powerful shield against a broad spectrum of infectious equine parasites, but also a vital solution to the threat of tapeworm infection in horses. Research conducted by Dr. Craig Reinemeyer of East Tennessee Clinical Research and published in the proceedings of the American Association of Veterinary Parasitologists has shown that an average of 54% of horses surveyed in the U.S. have been exposed to the parasite. The study provides an exposure range of 12.7% up to 95.8%*.

This potentially large infection rate is a serious concern for horse owners and breeders because of the severe damage tapeworms can do inside the horse. These parasites congregate at the ileocecal junction – the meeting place of the small intestine, cecum and colon – attaching themselves to the sensitive mucosa of this area with strong hooks. This creates inflammation, swelling and even ulcers at the attachment site.

As a result, tapeworms are a leading cause of colic in horses. In a study published by Proudman, French and Trees, the researchers found that 22% of spasmodic (gas) colics were associated with tapeworms, along with 81% of ileal impactions**. Ileocecal intussusception – a potentially fatal colic condition – is almost always caused by tapeworm infection***.

Equimax comes in a specially designed, ergonomic syringe that contains enough paste to dose up to 1,320 pounds of body weight. It has a sturdy, lockable dose adjuster, large print dosing scales on both sides, a curved finger grip and a shorter barrel for secure handling. The product’s palatable and smooth paste formulation is easy to administer as it slides quickly to the back of the tongue and down the throat.

Pfizer, Inc. (NYSE: PFE), the world’s largest research-based biomedical and pharmaceutical company, also is a world leader in discovering and developing innovative animal vaccines and prescription medicines. Pfizer Animal Health is dedicated to improving the safety, quality and productivity of the world’s food supply by enhancing the health of livestock and poultry; and in helping horses and pets to live longer and healthier lives. For additional information on Pfizer’s portfolio of equine products, visit

* Reinemeyer CR, Farley AW, Kania SA, Rohrbach BW, Dressler RH et. al. A prevalence survey of antibodies to Anoplocephala perfoliata in horses from the United States. Proceedings, American Association of Veterinary Parasitologists, Denver, CO, July 18 – 22, 2003.

** Proudman CJ, French NP, Trees AJ. Tapeworm infection is a significant risk factor for spasmodic colic and ileal impaction colic in the horse. Equine Vet J. (1998) 30 (3) 194-199.

*** The Horse, Diseases and Clinical Management. Kobluk, Ames & Geor, WB Saunders. (1995) p. 347.