en Aims: This study aimed to identify and elucidate the dimensions of preparedness of the pharmaceutical and medical equipment supply chain in disaster settings within the military health system in Iran.<br> Methods: A qualitative study using conventional content analysis grounded in a constructivist paradigm was conducted. Purposive sampling with a maximum variation strategy was applied, and 18 senior managers involved in procurement, storage, and distribution processes participated in semi-structured interviews. Data were analyzed concurrently with collection using the five-step approach of Hsieh and Shannon, and findings were organized through framework synthesis.<br> Findings: A total of 739 initial codes were extracted and subsequently condensed into 6 main themes, 16 categories, and 45 subcategories. The identified dimensions included needs assessment, selection and stockpiling of pharmaceuticals and equipment, demand forecasting, logistics infrastructure and distribution, inter-sectoral and inter-organizational coordination, and human resource and technological support. Preparedness was found to be a multidimensional and dynamic construct influenced by structural alignment, intelligent forecasting, efficient logistics management, coordinated governance, and the integration of advanced technologies.<br> Conclusion: Strengthening supply chain preparedness in disasters requires a comprehensive approach encompassing workforce capacity building, data-driven forecasting systems, structural reform of logistics networks, and enhanced inter-organizational coordination. Weakness in any of these dimensions may result in significant disruptions in the availability of essential medical supplies during crises. Disaster Planning, Supply Chain Management, Drug Distribution Systems, Strategic Stockpile, Logistics 1001 1014 http://ijwph.ir/browse.php?a_code=A--1-89&slc_lang=en&sid=3