Prior authorisation is an adjudication against written criteria, and the criteria are usually obtainable. Requesting them before submitting is the single highest-yield step in the process.
The salt-form point: the statutory pathway for compounding a copy of an approved drug during a shortage applies to the same active moiety as the approved product. A preparation described as a salt form — "semaglutide sodium", "semaglutide acetate" — is describing a different chemical entity from the approved base, and the description is usually there to construct an argument that it is not a copy. Whatever the legal merits, it means what is in the vial is not what was studied.
Specifically, twelve-month cost modelling, laid out: take the monthly product cost, add consultation or subscription fees, add laboratory monitoring at your chosen interval, add shipping, and then adjust the product cost for actual delivered content and dead-space loss. The route that looks cheapest per vial frequently is not cheapest per twelve months, because the fee structure and the monitoring dominate at lower product costs.
I would flag that a compounded preparation and an approved product are different objects even when they nominally contain the same molecule, and the difference is release testing rather than intent.
Verify accreditation on the accreditor’s register rather than on the pharmacy’s website. It takes a minute.