Abstract

SHIROBASTI: CLASSICAL BASIS, PROCEDURAL VARIATION, PROPOSED MECHANISMS AND EVIDENCE GAPS — A NARRATIVE REVIEW

Dr. Sanket Charjan*, Dr. Pratik Chachane^, Dr. Vishwajeet Patade, Dr. Sanket Charjan

Abstract

Background: Shirobasti is a classical Ayurvedic Murdhnitaila procedure in which warm medicated oil is retained over the scalp using a specially designed cap. It is traditionally indicated in Vata-predominant disorders affecting the head. However, variations in classical descriptions and the lack of standardized procedural protocols present challenges for its contemporary clinical application. Furthermore, its proposed mechanisms of action require critical evaluation in light of current physiological and pharmacological knowledge. Objective: To critically review classical descriptions of Shirobasti, synthesize a practical procedural framework, evaluate its proposed mechanisms of action, and identify gaps in the existing clinical evidence. Methods: A narrative review was undertaken of relevant classical Ayurvedic Samhitas and their commentaries. Bibliographic sources and clinical trial registries were also explored to identify available human studies and registered research protocols related to Shirobasti. Results: The reviewed classical sources demonstrate agreement regarding the fundamental principle of Shirobasti, although variations exist in procedural details, including the type of retaining vessel, oil level, duration, and timing. The hypothesis that oil constituents reach the brain through direct transdermal absorption remains unsupported by established transdermal pharmacology. Relaxation-mediated effects are physiologically plausible but have not been adequately investigated specifically for Shirobasti. The available human evidence appears to be limited predominantly to small-scale, open-label, or uncontrolled studies, alongside registered clinical research protocols. Conclusion: Shirobasti has a well-established basis in classical Ayurvedic literature; however, its clinical effectiveness and underlying mechanisms remain insufficiently substantiated by robust scientific evidence. Standardization of procedural parameters and well-designed controlled clinical trials using validated outcome measures are necessary to establish its safety, efficacy, and potential clinical applications.

Keywords: Shirobasti; Murdhnitaila; Snehana; Vata; Shiroroga; Panchakarma; Narrative Review.