Kersen (Mutingia calabura L.) leaves have pharmacological effect as antioxidant, antibacterial, anti-inflammatory, antihyperuricemia, antiobesity, antidiarhheal, antihyperlipidemic, analgesic, anthelmintic. Kersen leaves contain secondary metabolites, alkaloid, flavonoid, tannin, saponin, steroids. High flavonoid compounds require toxicity testing. This study aimed to determine the acute toxici…