Multi-region, US FDA-CVM vs UK VMD vs AU APVMA?

Each region has a different regulator + different approved-drug list + different distributor landscape. Magento handles this via multi-store-view + multi-source inventory (MSI).

• US, FDA Center for Veterinary Medicine (CVM). NADA/ANADA numbers, DEA Schedule II-V workflow, state vet board licensure. Distributors: Henry Schein AH, Patterson Vet, MWI (AmerisourceBergen), Covetrus.
• UK, Veterinary Medicines Directorate (VMD) (part of DEFRA). VMD Marketing Authorisation numbers, separate controlled-drug schedule under the Misuse of Drugs Act 1971, Royal College of Veterinary Surgeons (RCVS) Practice Standards. Distributors: NVS Group, Henry Schein UK, Covetrus UK. Brexit added a layer: post-2021, separate VMD authorisation needed for products previously approved EU-wide; some products vanished from the UK market.
• AU, Australian Pesticides and Veterinary Medicines Authority (APVMA). APVMA registration numbers, S4 (prescription) vs S8 (controlled) scheduling under the Therapeutic Goods Act, state-by-state vet board (e.g. Veterinary Practitioners Board of NSW). Distributors: Lyppard Australia, Provet, Covetrus Australia.
• EU, European Medicines Agency (EMA) for centrally-authorised products + national authorities for the rest. Different country-by-country distribution landscape.

Architecture: separate Magento store view per region (US in en_US + USD + FDA-CVM rules, UK in en_GB + GBP + VMD rules, AU in en_AU + AUD + APVMA rules). Separate stocks in MSI (US warehouses fulfill US orders, AU warehouses fulfill AU orders, can’t cross-border-ship controlled drugs). Separate catalog rules per region (a SKU approved in US-FDA-CVM may not be approved in UK-VMD; hide it at the source level in UK stock).

This isn’t a config tweak, multi-region vet-supply is an 8-12 week scope on top of a single-region build. Plan accordingly.