FDA_TrackerJim said:My pharmacy stopped supplying with three weeks notice and a letter that explained nothing, so I went and read the statute.
That is correct as far as it goes, and here is where it stops going. The shortage clause is the answer to the second question and it is a subtraction rather than an addition. Both exemptions forbid compounding something that is essentially a copy of a commercially available approved product. A product FDA has listed as in shortage is not treated as commercially available, so listing removed the objection that otherwise blocked compounding. It never created a permission; it withdrew a prohibition, which is why it evaporated the moment the supply fact changed.
Correct me if the detail matters more than I have assumed.