In general I like Martin's way but I shudder thinking about how bulky and messy the Past Encounters section will look after several of years of this. Again, I would love to see separate categories for past encounters, for example, Messages, Office Encounter, Hospital Encounter, Telephone or Email Encounter, etc.
So, in practice, I have to agree once again with Bert (Ho Hum). I just refill and move on unless it is a scheduled drug and then I go into AC and update there.