I bought from an ebay seller. It came with a dose for a large dog, a little vial with screw-on lid, a little syringe, plus a dosage sheet for about $25. I only use it when necessary--during flea season. Because there is such a difference between a 7 lb yorkie and a 22lb dog, I used the dosage for a
cat, (.5) That gave me 8 doses. In the future I am going to buy from Costco and let my ...