The application dimension of Antidepressants Drugs segmentation divides the market according to the primary therapeutic indication for which the agents are prescribed. Major Depressive Disorder remains the dominant driver, accounting for roughly 55 % of total sales, reflecting its prevalence and the breadth of approved agents. Anxiety disorders constitute the second‑largest segment (≈ 25 %), as many antidepressants—particularly SSRIs and SNRIs—are approved for generalized anxiety, panic, and social anxiety, expanding the addressable patient pool. Chronic pain (≈ 10 %) leverages the analgesic properties of certain serotonergic‑noradrenergic agents, while sleep disorders (≈ 5 %) capture a niche where low‑dose antidepressants are utilized off‑label for insomnia. The residual Other category (≈ 5 %) aggregates emerging indications such as menopausal symptoms and neuro‑cognitive disorders. Each application contributes proportionally to the overall market size, shaping R&D pipelines, pricing strategies, and regional adoption patterns, and together they define the market’s demand structure.