The Drug Supply Chain Security Act (DSCSA) — which mandated unit-level pharmaceutical serialisation and electronic interoperability across the US drug supply chain by November 2023 — has pushed pharmaceutical manufacturers, wholesalers, and dispensers to implement serialisation infrastructure. Blockchain-based track-and-trace systems that provide tamper-evident, multi-party product movement records are now in production at major pharmaceutical companies and their distribution partners. This guide covers the DSCSA requirements, the blockchain architecture patterns, and the implementation decisions enterprises face.
DSCSA Requirements
What DSCSA Requires in 2026
DSCSA requires all drug supply chain trading partners to: (1) serialise products at saleable unit level (each bottle/pack receives a unique National Drug Code + serial number, lot number, and expiry date encoded in a GS1 2D DataMatrix barcode); (2) create and exchange transaction information (TI), transaction history (TH), and transaction statement (TS) for every change of ownership; (3) achieve interoperability — electronic exchange of product traceability information between trading partners within 72 hours of a verification request; (4) implement enhanced drug distribution security including quarantine and investigation of suspect and illegitimate product. Unit-level traceability is the most demanding phase — now fully in effect.
Why Blockchain for Pharmaceutical Serialisation
| DSCSA Challenge | Traditional EDI Approach | Blockchain Approach |
|---|---|---|
| Multi-party data consistency | Each party maintains own database — reconciliation complex | Shared distributed ledger — single source of truth |
| Tamper-evident audit trail | Database records can be altered | Immutable transaction history — cryptographic proof |
| 72-hour verification response | Manual lookups across multiple trading partners | Instant on-chain query of serialisation data |
| Counterfeit detection | Difficult to detect re-use of legitimate serial numbers | On-chain history reveals if serial already dispensed |
600M
Prescription drug packages serialised annually in the US — the volume of unit-level traceability records that DSCSA infrastructure must handle, requiring industrial-scale blockchain or distributed ledger performance
MediLedger
The leading pharmaceutical industry blockchain network for DSCSA compliance — a Hyperledger-based permissioned network operated for the pharmaceutical industry, with participation from Pfizer, Merck, Genentech, AmerisourceBergen, McKesson, and Cardinal Health
72h
DSCSA verification response requirement — trading partners must respond to serialisation verification requests within 72 hours. Blockchain verification is essentially instant vs days for paper-trail lookups
MediLedger Network
MediLedger is the pharmaceutical industry's preferred DSCSA compliance blockchain — a purpose-built permissioned network running on a Hyperledger Besu consortium chain. Members share serialisation data and handle DSCSA verification requests on-network. To join: become a MediLedger member, integrate the MediLedger API with your serialisation system (SAP, Tracelink, Systech), and connect your ERP to the network. For pharmaceutical manufacturers and distributors with DSCSA compliance requirements, joining MediLedger is typically faster than building a custom blockchain network. Our blockchain development team handles MediLedger integration.
Suspect Product Investigation
DSCSA requires investigation of suspect products — drugs that may be counterfeit, diverted, stolen, or intentionally adulterated. On-chain serialisation history enables: immediate determination of whether a serial number is legitimate (vs counterfeit), full movement history of the specific product unit (chain of custody verification), and instant identification of all other units from the same lot currently in distribution. Blockchain provides the counterfeit-proof audit trail that DSCSA investigations require — the tamper-evidence that database records cannot offer.
Serialisation System Integration
For manufacturers implementing DSCSA with blockchain: the serialisation system (Tracelink, Systech, SAP TM Pharma) generates the GS1 barcodes and manages the serialisation database. The blockchain layer receives serialisation events (commissioned, shipped, received, dispensed) via API and writes them to the distributed ledger. Key integration points: ERP (SAP, Oracle) for shipping and receiving events, WMS for warehouse movements, serialisation system for serial number management. The blockchain is the immutable audit layer on top of existing serialisation infrastructure.
GS1 Verification Router Service
FDA's Verification Router Service (VRS) routes DSCSA saleable returns verification requests from dispensers to manufacturers. Manufacturers must respond to VRS queries within 72 hours confirming the legitimacy of returned product serialisation data. Connect your serialisation system to the VRS via the GS1 US VRS API. Blockchain serialisation records make VRS responses trivial — the on-chain history provides immediate verification of the serial number's legitimacy and movement history without manual investigation.
Pharmaceutical Serialisation and DSCSA Compliance
Our blockchain development, API integration, and software development teams implement DSCSA-compliant pharmaceutical serialisation systems. Book a free advisory session.