The March 2011 Drug Update for Medical Director 3 and Medical Director 2 is available now from HCN.
It can be downloaded from the HCN Subscribers Download Area
From HCN
HCN strongly recommends that you update your MDref database every month. Monthly PBS changes, including new items, Streamlined Authority changes and PBS pricing details, are included in the monthly MDref update. Without this data you are at risk of creating invalid PBS scripts.