Australia: 503B, and what it actually costs here
Something I keep coming back to: Australia: 503B, and what it actually costs here.
The intake asked me three questions and none of them were about my history. That told me everything I needed to know about the model.
Switched between two compounded preparations and the concentration on the label was different. Redid the arithmetic on paper before drawing anything.
Asked for the beyond-use date basis and got a real answer with a stability reference attached. Not universal, apparently.
Would rather be corrected in public than confident in private.
best — the order this archive was captured in
On concentration, which is where I see people actually get hurt.
A compounded vial can be filled at a different concentration from the branded product you were previously using. If you carry over your old arithmetic — same number of units, different mg/mL — you draw a different amount and may not notice for weeks.
Read the label every time you switch. Redo the arithmetic on paper. Write the concentration on the vial. It is the same habit c/reconstitution keeps preaching and this is the case where it actually bites.
Added a jurisdiction tag — the answers to this question are completely different in different countries.
Nothing in this thread is medical advice, and the choice between arrangements is one for you and a prescriber who knows your history.