Ivermectin as active ingredient. 1.87% ivermectin dewormer that treats a horse up to 1250 pounds. Effective on large strongyles, small strongyles, pinworms, ascarids, hairworms, largemouth stomach worms, bots, lungworms, summer sores, dermatitis and intestinal threadworms. One .21oz syringe treats up to 1250lb. Limit 6 per customer.
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