A Systematic Critical Review of Kaiyadev Nighantu with Conceptual Insights

framework. It is a classical Ayurvedic lexicon that systematically describes medicinal, dietary and lifestyle-related substances. It presents a concise and practical classification of dravyas, highlighting their nomenclature and therapeutic relevance. The text remains important for accurate drug identification and holistic Ayurvedic practice. Methodology- The review is based on classical Ayurvedic texts, Kaiyadeva Nighantu and relevant scholarly literature. Results- Kaiyadeva Nighantu classifies substances into eight Vargas: Aushadhi, Dhatu-Dhanya, Drava, Mamsa, Krita-Anna, Vihara, Mishraka and Nanarthaka, covering medicines, foods, liquids, lifestyle factors, and polysemous terms. Discussion- The text provides a clear and holistic classification useful for clinical practice, though some descriptions require modern scientific correlation. Conclusion- Kaiyadeva Nighantu remains a concise and relevant reference for Ayurvedic drug identification and integrated health practice.