Ilsung Is Co., Ltd. manufactures and sells pharmaceutical products in South Korea. The company offers a broad portfolio of generic and branded medications, including penicillin antibiotics; contrast mediums such as iohexol and iopamidol formulations (Rayhexol Inj., Raypam Inj.); digestive drugs; cardiovascular agents; antihistamines; anti-diabetics; bone disease drugs; analgesics; muscle relaxants; anesthetics including sevoflurane (Sevoprane Inhalation Solution); skin disease drugs; psychiatry drugs such as nortriptyline hydrochloride (Sensival); antivirals; antipyretics; circulatory system drugs; anti-coagulants; probiotics; vaccines; medical equipment; diabetes treatments; osteopathic medicines; anti-emetics; respiratory treatments; adrenal cortical steroids; and neuromuscular blockers/central muscle relaxants. Ilsung Is distributes its products through wholesalers, hospitals, pharmacies, and other channels while also providing consignment manufacturing services (CMO) particularly for antibiotics. Founded in 1954 and headquartered at 9 Wonhyo-ro 84-gil, Yongsan-gu, Seoul, South Korea, the company primarily serves domestic markets with select exports to regions including Georgia, Japan, Mongolia, and Pakistan, and maintains partnerships with global firms such as GSK, Abbott, Ono, and Teijin for in-licensing. In April 2024, Ilsung Pharmaceuticals Co., Ltd. changed its name to Ilsung Is Co., Ltd., reflecting a strategic rebranding amid ongoing focus on core therapeutic areas like antibiotics, cardiovascular, anesthetics, and contrast media, with expansions into gastrointestinal, central nervous system, and other segments; the firm reported earnings for Q1 2025 ended March 31, underscoring stable operations under CEO Suk-Keun Yoon.