I was given oxycodone 5 mg at the pharmacy. In the bottle it has a white round oval pill that nadolol 20mg (SZ/465) is printed on one side. I have a round yellow pill that is also nadolol 20mg (M/28) printed on the back of it. These are not a controlled substance I researched them. I had to issue my driver license to pick up these. How are these related to oxycodone 5mg that is a controlled substance?