This has been mentioned often, if you are dealing with a drugstore like Walgreen or Eckert, etc,,,,, according to a pharmacist, they put contract out on generic drugs, therefore you can get a different supplier every month. If you deal with a pharmacy as Athena, again according to a pharmacist. you will have the same supplier month after month because they are a distributor and deal with the same supplier every month. I hope I reported this correctly. Gerry