Pharmaceutical waste caused by unused and expired medicines is a persistent global challenge, resulting in financial loss, environmental contamination, and inefficient utilization of healthcare resources. Reports from global health agencies indicate that a substantial proportion of medicines procured worldwide never reach patients and expire unused. In contrast, non-governmental organizations (NGOs) and charitable health- care providers serving underprivileged communities frequently face shortages of essential medicines due to fragmented donation mechanisms and lack of timely coordination.

This paper presents MediShare, a web-based medicine do- nation and redistribution platform designed to bridge the gap between surplus medicine holders and verified NGOs through structured digital workflows. Unlike conventional healthcare donation systems that primarily focus on emergency response or inventory listing, MediShare introduces an expiry-aware and NGO-centric prioritization model that allocates medicines based on remaining shelf life, organizational demand, and medicine criticality. The platform employs a weighted urgency scoring mechanism to minimize wastage and maximize timely utiliza- tion. Experimental evaluation using simulated real-world data stored in a Supabase-backed database demonstrates improved redistribution efficiency and significant reduction in expiry risk.