A CRITICAL REVIEW OF BHAISHAJYA SEVANA KALA IN AYURVEDIC CLASSICS AND ITS CLINICAL SIGNIFICANCE

Abstract

Background: Bhaishajya Sevana Kala denotes the appropriate time for administration of medicine in relation to food, digestive activity, Dosha predominance, disease state and patient strength. Ayurvedic classics describe several timings such as Abhakta, Pragbhakta, Madhyabhakta, Adhobhakta, Antarabhakta, Sabhakta, Samudga, Muhurmuhu, Grasa, Grasantara and Nishi. Modern chronopharmacology also recognizes that biological rhythms and food can influence drug response, making the classical concept relevant for critical clinical review. Aim and Objectives: To critically review Bhaishajya Sevana Kala in major Ayurvedic classics, compare the classifications, explain the probable therapeutic rationale of each Kala, and assess its clinical significance in present-day practice. Materials and Methods: Classical references were reviewed from Charaka Samhita, Sushruta Samhita, Ashtanga Hridaya, Ashtanga Sangraha, Sharangadhara Samhita and Kashyapa Samhita. Relevant commentaries and selected literature on chronopharmacology and food-drug interactions were also considered. Observations and Results: The classics consistently connect medicine timing with food, Agni, Dosha, Vata subtypes, patient strength and disease location. Empty-stomach administration is generally reserved for stronger patients and situations requiring stronger action, whereas food-associated administration is preferred when moderation, palatability or specific physiological direction is desired. Repeated, morsel-wise and bedtime administration have distinct indications. Discussion: Bhaishajya Sevana Kala can be interpreted as a personalized temporal prescribing principle rather than a fixed clock schedule. Its broad logic is compatible with modern observations that food and circadian biology influence drug disposition, although direct equivalence should not be assumed. Conclusion: Proper selection of Bhaishajya Sevana Kala may improve therapeutic precision, tolerance and clinical response. Well-designed pharmacological and clinical studies are required to validate individual classical timings.