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Fewer doses means less stress on you and your horse. With just a single dose, QUEST® and QUEST® PLUS Gel treat and control encysted small strongyles, bots and roundworms. QUEST PLUS is the ideal deworming choice for late fall as it contains an additional active ingredient — praziquantel — to specifically target tapeworms. The American Association of Equine Practitioners (AAEP) recommends tapeworm treatment in the late fall or winter after tapeworm transmission ends due to cold weather.1

Compare that with fenbendazole – marketed as Panacur® Powerpac or Safe-Guard® Power-Dose® – which requires a double dose every day for five days and still doesn’t treat bots. A recent study showed moxidectin, the active ingredient in QUEST and QUEST PLUS, reduced fecal egg counts by 99.9% compared with fenbendazole, which was only 42% effective.2,*

When parasites are overexposed to certain treatments, they can become resistant, leaving fewer treatment options. Small strongyles have been shown to have widespread resistance to fenbendazole,3 one of the oldest products on the market.4 Moxidectin, the active ingredient in QUEST and QUEST PLUS, is one of the newest active ingredients5 and continues to show superior efficacy.2,*

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 American Association of Equine Practitioners. AAEP Parasite Control Guidelines. Available at: http://www.aaep.org/info/parasite-control-guidelines. Accessed January 29, 2016.
2 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.*
3 Kaplan RM. Anthelmintic resistance in nematodes of horses. Vet Res. 2002;33:491-507.
4 U.S. Food and Drug Administration. NADA 120-648 Panacur and Safe-Guard - supplemental approval (May 28, 1985). Available at: http://www.fda.gov/AnimalVeterinary/Products/. Accessed February 24, 2016.
5 Kaplan, R.M., Nielsen, M.K., 2010. An evidence-based approach to equine parasite control: It ain’t the 60s anymore. Equine Veterinary Education 22, 306-316.
* This study compared QUEST (moxidectin) Gel with Panacur Powerpac (fenbendazole).

QST-00039