Synopsis Study of Ayurveda is eternal. One can try to understand Ayurveda in one’s life. It seems very difficult. Hence it is beneficial to study Ayurveda everyday, every life. In this book salient features about principles of Ayurveda are considered as described in Ayurvedic Treaties and recent research references are given for benefit of interested persons. Be Ayurveda help every body to be happy! Dravyaguna-shastra is very important and integral section of Ayurvedic System of Medicine. In fact it is a part and parcel of a subject called Dravyaguna-Rasashastra. Dravyaguna deals with substances mostly of herbal origin and some of animal origin, while Rasashastra deals with the substances which are minerals e g metals, non-metals etc. Not only that Dravyaguna-rasashastra despite dealing with the medicinal properties of the herbals as well as minerals also deals with drug-making i e Aushadhi-Nirmana. So Dravyaguna-Rasashastra can be called Pharmacology-cum-Pharmacy of Ayurvedic System of Medicine.