DRAVYAGUNA IN AYURVEDA: A REVIEW OF THE PHARMACODYNAMIC ROLE OF GUNA AND RASA

Abstract The science of Dravyaguna Vigyana in Ayurveda forms the foundational framework for understanding the pharmacological and therapeutic attributes of substances. It encompasses a comprehensive study of Nama Jnana (nomenclature), Guna Jnana (qualities), Rupa Jnana (form), and Yukti Jnana (rational application), focusing on both medicinal and dietary substances. Dravya refers not only to a physical substance but also to its inherent properties that influence its pharmacodynamic and therapeutic behavior. Central to this doctrine are five key principles: Rasa (taste), Guna (qualities), Virya (potency), Vipaka (post-digestive effect), and Prabhava (specific action), which together determine the drug's action on the body. Among these, Guna and Rasa play a vital role in influencing biological responses and guiding the selection of appropriate therapeutic agents. Rasa, derived from the Panchamahabhutas (five great elements), provides immediate sensory insight into a substance's action, while Guna, the qualitative attributes, govern its functional role in maintaining or restoring homeostasis. This review attempts to consolidate classical and contemporary Ayurvedic perspectives on Guna and Rasa, emphasizing their clinical significance in diagnosis, drug selection, and treatment planning. By revisiting ancient wisdom with modern interpretive insight, the article highlights how the understanding of these attributes can enhance the precision of Ayurvedic therapeutics. The integration of Dravyaguna principles with clinical application underscores the unique and holistic approach of Ayurveda in ensuring health and treating disease.