2026. Beyond Black-Letter Antitrust: Pharmaceutical Patent Expiry, GenericCompetition, and the Rule of Reason in the Pfizer-Dexa Amlodipine Case a Comparative Legal-Systemic Study of Indonesia, the United States, the European Union, and Japan. Asian Journal of Social and Humanities. 4, 9 (Jun. 2026), 4507–4513. DOI:https://doi.org/10.59888/ajosh.v4i9.747.