Conceptual Understanding of Aushadha Sevana Kāla: A Classical and Contemporary Ayurvedic Review

Aushadha Sevana Kāla (Bhaishajya Kāla) refers to the specific timing of drug administration, a core principle of Ayurvedic therapeutics. Classical Ayurvedic texts emphasize that the efficacy of a medicine depends not only on its formulation and dosage but also on its appropriate time of administration. This review presents a detailed conceptual understanding of Aushadha Sevana Kāla based on classical Samhitas including Charaka Samhita, Sushruta Samhita, Ashtanga Hridaya, and Sharangadhara Samhita. Various classifications, textual references, clinical significance, and their correlation with modern chronotherapy are discussed to highlight the contemporary relevance of this principle.