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When should I use QUEST® or QUEST® PLUS Gel?

SPRING — QUEST® (moxidectin) is an ideal dewormer for spring when encysted small strongyles (strongyles in the larval stage) typically emerge. QUEST effectively treats and controls encysted small strongyles in a single dose. In a recent study, QUEST was also nearly twice as effective in reducing egg counts as a five dose treatment of fenbendazole.1

FALL — QUEST® PLUS is the ideal deworming choice for late fall administration as it not only kills bots but contains an additional active ingredient – praziquantel – that specifically targets tapeworms. Tapeworm treatment is recommended by the American Association of Equine Practitioners (AAEP) once a year, in the late fall or early winter after tapeworm transmission ends due to cold weather.2 

Depending on your horse’s parasite risk factors, these two treatments may be all that are needed.

AAEP Guidelines Recommend Individualized Deworming

Because every horse is unique, the AAEP developed guidelines recommending to work with your veterinarian to develop an Individualized Deworming plan tailored to your horse’s needs.
Prior to purchasing a dewormer, ask your veterinarian to conduct a fecal egg count test. Then evaluate your horse’s Individualized Deworming needs by answering a few questions, on IDMyHorse.com.

Do not use QUEST Gel or QUEST PLUS Gel in foals less than 6 months of age or in sick, debilitated and underweight horses. Do not use in other animal species, as severe adverse reactions, including fatalities in dogs, may result.


1 Mason ME, Voris ND, Ortis HA, et al. Comparison of a single dose of moxidectin and a five-day course of fenbendazole to reduce and suppress cyathostomin fecal egg counts in a herd of embryo transfer-recipient mares. J Am Vet Med Assoc. 2014;245(8):944-951.*

2 American Association of Equine Practitioners. AAEP Parasite Control Guidelines. Available at:http://www.aaep.org/info/parasite-control-guidelines. Accessed January 29, 2016.

* This study compared QUEST (moxidectin) Gel with Panacur Powerpac (fenbendazole).

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