What a clinic owner can and cannot plan up front
You can plan the structure: which SKUs drive volume, expected refill cadence, and the patient price points your market supports. What you cannot plan up front with Promise Pharmacy is the COGS number itself, because per-vial wholesale rates are not public. That gap matters most for high-volume GLP-1 programs, where a small per-vial difference multiplied across hundreds of monthly refills swings the bottom line. Before margin depends on it, ask your account manager for written per-vial cost on your top three SKUs and confirm whether the rate is fixed or moves at wholesale volume tiers.
Also clarify how ancillary costs hit the P&L. Promise Pharmacy advertises no hidden fees, but shipping, cold-chain handling, and payment processing terms are not published on the site. If any of those are billed separately from the portal drug rate, the wholesale line understates true landed cost. Build your margin model on the all-in number per vial delivered, not the headline wholesale rate alone.