The Application dimension of the Bupropion Hydrochloride Extended Release Tablets market is divided into four primary therapeutic uses: Major Depressive Disorder (MDD), Seasonal Affective Disorder (SAD), Smoking Cessation, and Off‑label indications such as attention‑deficit hyperactivity disorder. MDD accounts for the largest share, roughly 55 % of total sales, reflecting its status as the principal FDA‑approved indication and the broad patient base it serves. SAD contributes about 20 % of revenue, driven by seasonal prescribing patterns in higher‑latitude regions. Smoking Cessation also represents 20 % of the market, sustained by public‑health initiatives and insurance coverage for cessation programs. The remaining 5 % stems from off‑label applications, where clinicians prescribe the drug for conditions like ADHD or weight management, generating modest but growing niche demand. This application‑focused taxonomy underpins the overall market size, as each segment’s volume and pricing dynamics directly influence aggregate revenue.