Grab bags are fun, mmkay?
DAOC community questions are answered in the latest edition of grab bag.
Q) I started using the strong draught of mending couple of weeks ago and I just noticed that whenever I use the potion a message pops up saying that "I already have that effect. Wait until it expires." I don't get it?
A) If you already have a more powerful health regen active, the spell from the potion will not overwrite it.
Go have a look at the Camelot Herald.