In my opinion, you should C.) Question it, and find out if this is happening unknowingly
Firstly, I would not go dumpster diving and try to find medicine to recycle it (for obvious sanitary reasons). Secondly, medicine is expensive and should no be wasted, so doing nothing could harm the company and its clients. Lastly, using more medicine than you need could bring you harm. Instead, try to find if their is a reasonable explanation for this and alert the company if they are not aware.
Hope this helps!