I suggest using this data structure on the Firebase side:
- meds
- aspirin : true
- Lipitor : true
- metoprolol : true
so you could retrieve a list of med names by setting your bucket to meds and
requesting a taglist (meds/aspirin, meds/Lipitor, meds/metoprolol) and extracting the last item from splitting each tag at /
This organization allows you to add/remove meds individually.
Firebase.StoreValue("meds/PreparationH", true)
Firebase.ClearValue("meds/aspirin")
http://code.appinventor.mit.edu/reference/components/experimental.html#FirebaseDB