Andrographis paniculata leaves are often used as an anti-hypertension medicine. However, its effects in the blood vessels are not clearly known. This research was aimed to measure the activities of Andrographis paniculata leaves extract on blood vessels contractility. Andrographis paniculata leaves were meceratde with CHCL3: Me-OH (1:1), and tested for ther effects on the contractility of the i…