Application segmentation maps CGRP Receptor Antagonists demand across migraine prevention, acute migraine treatment, and emerging cluster headache indications. Prevention—where biologics dominate—generates the largest absolute spend because of chronic administration, long therapy duration, and higher willingness-to-pay for quality-of-life gains. Acute treatment, primarily served by gepants, captures substantial prescription numbers but lower per-patient revenue due to intermittent dosing and payer quantity limits. Cluster headache remains exploratory; limited patient pool and lack of formal approvals yield minimal current sales yet offer future upside if late-phase trials corroborate CGRP blockade efficacy. Collectively, these application subsegments clarify how clinical utility, dosing frequency, and reimbursement policies interact to define the market taxonomy and forecast revenue trajectories.