The term ‘dravya’ means matter, substance, or anything with a quality and activity. Dravya is an entity with an inseparable relationship ([[samavaya]]) with the attributes of quality and action. (SAT-A.176)<ref>National AYUSH Morbidity and Standardized Terminologies Electronic Portal by Ministry of AYUSH Available on http://namstp.ayush.gov.in/#/Ayurveda</ref> Among the six categories (shatpadartha), dravya is essential to understand the existence of the other five categories. Dravya is the basis of any clinical studies as a drug or formulation. It is a cause ([[karana]]) behind the effect (karya) as per the cause-and-effect theory (karya-karana bhava). | The term ‘dravya’ means matter, substance, or anything with a quality and activity. Dravya is an entity with an inseparable relationship ([[samavaya]]) with the attributes of quality and action. (SAT-A.176)<ref>National AYUSH Morbidity and Standardized Terminologies Electronic Portal by Ministry of AYUSH Available on http://namstp.ayush.gov.in/#/Ayurveda</ref> Among the six categories (shatpadartha), dravya is essential to understand the existence of the other five categories. Dravya is the basis of any clinical studies as a drug or formulation. It is a cause ([[karana]]) behind the effect (karya) as per the cause-and-effect theory (karya-karana bhava). |