Quest Gel (moxidectin) Horse Dewormer is recommended for early grazing season use, the active ingredient moxidectin is a treatment of choice according to leading parasite experts with the American Association of Equine Practitioners. Quest Gel features a unique gel formula that dissolves on the tongue to help make deworming your horse easier. Less likely to be spit out compared to traditional pastes, the palatable gel formulation may help reduce waste and errors in dosing. This broad-spectrum dewormer targets small strongyles, large strongyles, roundworms, pinworms, hairworms and stomach worms. This dewormer is approved for use in breeding stallions and pregnant/nursing mares. Each patented Sure-Dial syringe treats a horse up to 1,500 pounds. *Source: American Association of Equine Practitioners. Parasite Control Guidelines. 2019. QST-00190R1.