Definitely check with the manufacturers, it'll also confirm whether what the pharmacist said was right.
In December my pharmacist handed me my insulin cartridges and said "these are being withdrawn". When I checked, it was some types of pre-filled pens that were being withdrawn/replaced, cartridges not affected. It seems the pharmacist got confused and was just telling all diabetics their "pens" were being discontinued! She meant well but was causing lots of unnecessary anxiety.