Ashtanga Hridaya is the third major treatise on Ayurveda. It was written by Vagbhata around the 7th century (AD 500). It is predominantly based on the teachings of Charaka and Susruta Samhitas though it also gives its own views on different topics. It contains information regarding the two schools of ayurveda, namely the school of surgery and the school of physicians. Ashtanga Hridaya Samhita is written in Sanskrit in the form of simple and easily understood poetic verses. It contains the salie