I agree with above Rainy's comments. I think there is no way of deleting the saved info.
Workaround is:
on the right side of main screen: when you get the message, if you click on the refills, refill the medicines, but make a manual entry in the message itself and save, you can atleast look at the past encounters, see any entries re: refills. This takes extra time, but all workarounds I believe do that anyway.
I have e-mailed to Jon:
that we need more detailed audit log of medication database: like how many/refills were prescribed. Should have the ability to delete wrong entries like the ones you mentioned.
Regards.