Published Paper Details:

The rapid growth of counterfeit medicines presents a significant challenge to public health, supply chain integrity, and regulatory compliance in global healthcare systems. Conventional centralized supply chain management (SCM) systems suffer from limited transparency, susceptibility to data tampering, and single points of failure. To address these issues, this paper proposes MediLedger, a blockchain-based medicine traceability framework that ensures end-to-end visibility, authenticity, and security across pharmaceutical supply chains. The system utilizes blockchain's immutable distributed ledger, cryptographic hash functions, smart contracts, and QR-code-based verification to prevent the circulation of counterfeit drugs. Each medicine unit is assigned a unique digital identity recorded on the blockchain, enabling real-time verification by manufacturers, distributors, regulators, and consumers. A custom validation and consensus mechanism is employed to ensure data integrity, tamper resistance, and automatic recovery from malicious or faulty nodes. Experimental results demonstrate that MediLedger improves traceability, reduces verification time, and enhances trust among all stakeholders in the pharmaceutical ecosystem.