Segmentation by type differentiates the market into four formulation families, each influencing the total addressable market through unique distribution and usage patterns. Auto‑injector devices hold the greatest share, driven by convenience, dosing accuracy, and regulatory endorsement for self‑administration, thereby expanding both retail and hospital channels. Pre‑filled syringes occupy a secondary niche, primarily supplied to emergency departments and critical‑care units where controlled dosing and rapid preparation are essential. Vial and ampoule formats, while less prevalent, remain indispensable for compounding pharmacies and regions lacking auto‑injector approvals, contributing a modest but stable revenue component. Emerging nasal spray formulations, though currently limited to pilot programs, signal a potential growth vector as they aim to simplify administration for patients with needle aversion. The relative weight of each type reflects clinical preference, regulatory landscape, and reimbursement policies, collectively defining the market’s structural composition.