OBJECTIVES: The in vivo assay is a key step in the development of a new compound as a drug. In the present work, bis-4-aminocoumarin derivative 3,3'-(p-tolylmethylene)bis(4-amino-2H-chromen-2-one) ( METHODS: The in vivo anti-hyperglycemic effect of RESULTS: The obtained results revealed that both selected compounds, CONCLUSIONS: In summary, in vivo anti-hyperglycemic effects of two synthetic compounds