VIRECHANA KARMA (THERAPEUTIC PURGATION): PHARMACOLOGICAL RATIONALE, SAFETY AND CLINICAL EVIDENCE – A NARRATIVE REVIEW
Background: Virechana Karma, or therapeutic purgation, is the Panchakarma procedure classically directed at the elimination of aggravated Pitta. It is used alone or as part of multimodal protocols across many conditions. Objective: To review the classical basis of Virechana and to summarise published evidence on its safety, mechanisms and clinical effects. Methods: Narrative review based on a PubMed search and classical texts. Findings: In a study of 15 patients, serum electrolyte values before and after Virechana remained within normal ranges. In 19 patients with obesity, Virechana was associated with reduced colonisation of facultative aerobic bacteria in stool. In a randomized study of major depression, a Virechana module followed by an Ayurvedic formulation and Shirodhara was associated with lower depression scores, greater vagal tone and lower cortisol, although there was no placebo control. In a randomized controlled study of diabetic retinopathy, a protocol including mild Virechana and Nasya gave better outcomes on selected retinal and metabolic parameters than conservative care. Conclusion: Virechana shows acceptable short-term safety in small studies and plausible mechanistic signals. Most clinical reports involve multimodal protocols, so the independent effect of Virechana remains undetermined.