Concept of Aushadha Sevana Kala (Time of Drug Administration)

Abstract

The therapeutic success of any medicine not only depends on the quality of the drug and its dosage but also on the time of its administration—termed as Aushadha Sevana Kala in Ayurveda. This concept plays a crucial role in determining the pharmacodynamics and pharmacokinetics of medicines, aligning their effect with the biological rhythm and digestive strength (Agni) of the individual. The classical Ayurvedic texts describe various Kal?s or time schedules such as Pr?gbhakta, Madhyabhakta, Adhobhakta, Antarabhakta, Samudga, and Nish?, each chosen according to disease, Do?ha predominance, and drug potency. Modern pharmacology also emphasizes the significance of dosing schedules in maintaining drug plasma concentration and optimizing efficacy, correlating with the principles of chronopharmacology. This paper explores the classical foundation, scientific rationale, and practical importance of Aushadha Sevana Kala in promoting therapeutic outcomes, integrating Ayurvedic wisdom with modern scientific interpretation.

KEYWORDS: Aushadha Sevana Kala, Ayurveda, Time of Drug Administration, Chronopharmacology, Agni, Dosha, Therapeutic Timing.