Blockchain-Based Traceability Systems for Enhancing Transparency in Pharmaceutical Supply Chains

Abstract

The pharmaceutical supply chain is highly fragmented, involving manufacturers, distributors, logistics providers, pharmacies, and regulators, which makes it easy to counterfeit drugs, tamper with information, and lack end-to-end visibility. According to global estimates, 10-15 million units of forged medicines are distributed each year in controlled markets, and the financial losses incurred worldwide are estimated at USD 200 billion. All these difficulties prove the necessity of safe, open, and accessible traceability systems. This paper introduces a blockchain-based traceability system that aims to enhance transparency, integrity, and accountability in pharmaceutical supply chains. Its methodology combines a permissioned blockchain architecture, smart contracts, IoT-enabled serialization, and product identification via QR codes to store and verify transactions at every supply chain node. The prototype system was tested using a simulated supply chain dataset comprising 50,000 transaction records across 5 distribution levels. An analysis of performance revealed that the minimum block transaction validation latency was 2.3 seconds and the data integrity detection rate was 99.2% under simulated tampering conditions. The system enabled record reconciliation to be completed in 48 hours, compared to the traditional 48 hours. Moreover, traceability coverage increased by 62% in traditional databases to full-scale end-to-end visibility in the blockchain setting. The findings show that blockchain technology is highly effective at increasing transparency, reducing counterfeiting risk, and improving regulatory compliance. The paper finds that the adoption of blockchain-based traceability systems has the potential to positively influence operational efficiency, stakeholder trust, and patient safety, and to create a secure, scalable foundation for next-generation pharmaceutical supply chain management.