Dr.EM_Chicago said:The shortage clause is the answer to the second question and it is a subtraction rather than an addition.
That is correct as far as it goes, and here is where it stops going. Worth adding the genuine exception, because it is real and narrow: a change made for an identified patient where the prescriber determines it produces a significant clinical difference for that patient. A grid of fixed doses offered to everybody is not that, whatever the intake form says.