Muhammad Nasri bin Yusoff, Abdul Jabar SNN, Kori AN. Co-administration of High-Dose Methotrexate with a Proton Pump Inhibitor in Primary Central Nervous System Lymphoma with Recent Upper Gastrointestinal Bleed: A Case Report and Literature Review. Asian J Med Health Sci. 2026;9(2). doi:10.70672/w2763k67