Health - Can test tell difference?

[Midwestpp]

swim is prescribed different types of morphine, say 30er 1x day, and 4 30 ir for breakthru. if they get another type from a friend, most likely a malli 100 or something, would this show up the same as all the other types of morphine or can they test for specifically what brand/type is prescribed. on the sheet of drugs to check if taking, there's morphine, morphine sulfate, ms contin and MSIR..also OxyIR,oxycodone, oxycontin and percocet-just for an example of showing that they have like all the different versions of the drug.. not sure if these are just there so the patient/employee can check off what they are prescribed(therefore if they show up they are all the same) or because they want to know exactly what you've checked because they can tell the differences between them all. if anyone has any experience with this please help. thanks!