Core Insights - Biogen's Zurzuvae (zuranolone) has received approval from the European Commission for the treatment of postpartum depression (PPD) in adults, making it the first and only approved treatment for this indication in the European Union [1][7] - The approval is based on the successful phase III SKYLARK study, which demonstrated rapid and sustained relief from depressive symptoms [2][7] - Biogen's stock has underperformed this year, with a 5% decline compared to a 3% growth in the industry [3] Product Performance - Zurzuvae was launched in the United States in December 2023, and sales reached $46.4 million in Q2 2025, reflecting a 68% increase sequentially due to rising demand [6][7] - The drug's launch exceeded Biogen's internal expectations, indicating strong market acceptance [6][7] Strategic Partnerships - Zurzuvae was developed in collaboration with Sage Therapeutics, which has been acquired by Supernus Pharmaceuticals. Biogen and Supernus share profits and losses from the commercialization of Zurzuvae in the U.S. [5] Future Growth Potential - Zurzuvae is one of four new product launches by Biogen, alongside Leqembi for Alzheimer's disease, Skyclarys for Friedreich's Ataxia, and Qalsody for ALS, which are expected to drive long-term growth [8]