Dravyaguna is an integral part of Ayurveda. . The word dravyaguna consist of 2 words:

1) Dravya = material of thing which can be living or not living.

2) Guna = properties It deals comprehensively about rasa, guna virya, vipaka and prabhava (pharmacokinetics and pharmcodynamics) of herbs.

Branch also deals with identification, collection, storage, and preservation of raw materials of plant origin. According to Charaka there is nothing on the earth which is not medicinal. That’s why Ayurveda considers all substances as medicine, if used for specific purposes in an appropriate way. In Ayurveda more than 600 medicinal plants are included as drugs and they are used either alone or in combination with each other to alleviate the disorders.