QUEST Gel Moxidectin Adult Horse Dewormer features a unique gel formula that dissolves on the tongue to help make deworming your horse easier. This broad-spectrum dewormer treats all key equine parasites to help keep your equine partner as healthy as a horse. The active ingredient, moxidectin, targets adult small strongyles, large strongyles, roundworms, pinworms, hairworms and stomach worms, so there’s no horsing around with multiple dewormers to get the comprehensive treatment you need. This dewormer is approved for use in breeding mares and stallions. Each syringe treats a horse up to 1,500 pounds.