Charak Samhita – Nidana Sthana – Chapter 7 (Unmada Nidana) Abstract Acharya Charaka was the writer of the Charak Samhita which explains about the various diseases, its causes, pathogenesis, risk factors, and the treatment. Along with this they also explained the panchkarma and herbal formulations to manage various conditions. In Charak Samhita, there are a total of 120 chapters and 8 Sthana which are named as Sutra sthana, Nidana sthana, Chikitsa sthana, vimana sthana, indriya sthana, kalp sthana, Siddhi Sthana,