Hi, what I think happens is each medicine reacts to a persons body in different ways. I have taken brand Xanax, generic xanax, brand valium, generic diazepam, I could not tell which was which until I got to the register, then the difference is clear.
As I said, different meds effect people different ways. I could no longer take xanax whether generic brand, it did not mix well with my pain meds. On the other hand, I can take diazepam, no worries.
Good Luck
Kathy
PS I have a used laptop and just found HW and signed on, I am so proud of myself