Ethnopharmacological Study of Anti-Gastric Ulcer in the Serangpanjang Region, Subang, West Java, Indonesia

Gastric ulcer (GU) is a disease characterized by damage to the gastric mucosal lining. GU can be caused by the use of non-steroidal anti-inflammatory drugs, Helicobacter pylori bacterial infection, smoking, and stress. The use of drugs tends to have negative effects on the body and safer alternative drugs from natural ingredients are needed. This research aims to document and preserve the use of ethnomedicinal to treat GU by communities in the Serangpanjang Region, Subang, West Java, Indonesia. Fieldwork was carried out from November to December 2025 using direct interviews, questionnaires and discussions. Plant species are identified based on standard taxonomic methods, flower morphological characteristics, and where possible, using samples for comparison, as well as consultation with experts and the literature. The plant types obtained were grouped into families according to the Cronquist classification system. Plant names were checked against the Plant List (www.plantlist.org) and the International Plant Name Index (www.ipni.org). This research reports that there are 30 plant species commonly used by people in the Serangpanjang Region for GU treatment. Among the various plant parts used, leaves (63.3%) are most frequently used in making medicines, followed by rhizomes (20%), fruit (10%), stems, and rhizomes (3.3% respectively). Meanwhile, the preparation methods most frequently used were decoction (53.3%) and infusion (46.7%). The results of this research confirm that people in the Serangpanjang Region still rely heavily on medicinal plants for their health care system, especially for the treatment of GU with the most frequently used parts of the leaves and their use in decoctions and infusions.