The Radiation Emergency Medications market can be partitioned by type, a taxonomy that isolates product classes with distinct development pathways and cost structures. Small‑molecule drugs dominate the segment because they are typically low‑cost, have established manufacturing scales, and are approved for immediate thyroid blockade (e.g., potassium iodide). This sub‑type accounts for roughly half of total market revenue, driven by large stockpiling programs in governmental health agencies. Biologics represent a second tier, encompassing hematopoietic growth factors such as filgrastim and pegfilgrastim, which stimulate bone‑marrow recovery after acute radiation exposure. Although biologics command higher pricing, their niche therapeutic role limits their share to approximately 30 % of market value. The third category, radiopharmaceuticals, includes agents like ^131I‑labeled compounds used for internal decontamination. Their specialized production and regulatory hurdles confine them to a modest 20 % of overall sales. This type‑based market taxonomy clarifies how each class contributes to the aggregate size and informs investment prioritization across the Radiation Emergency Medications segmentation.