Posted 11/3/2015 10:35 PM (GMT 0)
Why not call the pharmacist that filled your prescription and ask the same "hypothetical" question?
If you are able to use the friend's Rx, I'd be inclined to alternate doses of his/hers and yours....in the event the fillers are different and you respond somewhat differently.
Or, just pay close attention to how you feel if you take your friend's Rx for a succession of days.