It is the medicated purgation; one of the pancha karma cleansing processes.

Purgation therapy of panchakarma. Administration of therapeutic purgation or a therapeutic laxative. Virechan is facilitated with senna leaves, flax seeds, psyllium husks or triphala in a combination that is appropriate for the individual person. Indications for Virechan: Allergic rash, skin inflammation, acne, dermatitis, eczema, chronic, fever, ascites biliary, vomiting, jaundice, urinary disorder, enlargement of the spleen, internal worms, burning sensation in the eyes, inflammation of the eyes, conjunctivitis gout etc.