More of a statement here. In Australia we don't have "loading doses" the words don't exist.
Instead when we are diagnosed with PA we are usually put on regular injections of B12
Most of us then recognise that we need to SI and often
Then we take control by getting our supplies legally and readily from pharmacists.
For me it's SI every 4 days so that I stay on top of my symptoms, however it did take about 6 months from diagnosis before I recognised my personal situation