Upjohn is a pharmaceutical company, not a type of pill or drug. It could be used as a slang term for Upjohn manufactured alprazolam pills and in that case (and its not just some random pill), then yes, its the same thing. Alprazolam is Xanax.
Make sure the pills you're getting are actually Xanax/alprazolam. Google the pill's imprints to find out what it is.