ANADA # 200-326, FDA approved - unlike store brands and private label wormers. Expiration date - June, 2008. For years, ivermectin has been the dewormer of choice for savvy horse owners. Here are a few reasons why: Ivermectin kills 35 stages of worms and bots combined in a single dose, providing the broadest spectrum parasite control available With a wide margin of safety, ivemectin can be used on horses of all ages without age restrictions. Even young foals. Ivermectin can safely be used on broodmares at any stage of pregnancy and breeding stallions. Only ivermectin controls all three life stages of the two most common bot species that threaten horses: Gastrophilus intestinalis and Gastrophilus nasalis, offering protection all year long. No equine parasite resistance to date, even in horses dewormed exclusively with ivermectin. Ivermectin is effective in the treatment and control of 35 of the most important equine parasite species, including the following culprits: Ascarids/Roundworms Bots Hair Worms Intestinal Threadworms Large Strongyles Lungworms Neck Threadworms Pinworms Small Strongyles Stomach Worms Treats horses up to 1,250 pounds in a single dose.