Background: A limited spectrum and inappropriate use of anthelmintics lead to anthelmintic resistance. Among Indonesian medicinal plants, Adiantum raddianum (Suplir) and Kibatalia arborea (Jelutong Pipit) have shown antihelmintic properties.
Objective: To reveal the anthelmintic activity as preliminary screening of A. raddianum and K. arborea leaves.
Method: This study used the antihelmintic microdilution test towards methanol extracts at 500 µg/mL. The mortality of Caenorhabditis elegans expresses the presence of anthelmintic activity. Phytochemical screening was determined using thin-layer chromatography.
Result: The methanol extracts of both extracts had anthelmintic activity with mortality values of 14.941% and 15.134%, respectively. Both extracts contain polyphenols, flavonoids, terpenoids, and alkaloids found only in K. arborea.
Conclusion: This study reveals that the methanol extract of A. raddianum and K. arborea leaves have anthelmintic activity, which could be related to the findings of phytochemical constituents.