Orthosiphon stamineus Benth (Lamiaceae) is a plant with many ethnobotanical uses including antifungal and antibacterial activities. This study is aimed to determine the cytotoxicity and phytochemical content of O. stamineus leaves and flower using ethanol and water as solvents. The cytotoxicity of the extracts towards Vero cell was determined by MTT assay. The CC50 values were between 3.4-7.4 mg/ml and can be considered as nontoxic. Phytochemical screening revealed terpenes, alkaloid and phenolic were present in the leaves and flower of O. stamineus that might pose as the bioactive compound.
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