Ayurveda is a unique science because it uproots the diseases from the body and in this process Panchakarma plays a vital role. In acute diseases, if the vitiated doshas are removed timely, disease progression can be immediately arrested. Also in chronic diseases, Ama (endo toxins) are adhered strongly for vital organs and cells in the body and hence resists the medicine strongly. In this case also vitiated doshas are excreted through Panchakarma and only then diseases can be cured.
Poorva means before and Karma means procedure. Hence poorva karma are actions that are to be carried out before the main Panchakarma administration. Pachana, Snehana and Swedana are the poorva karma that are to be carried out for the proper Panchakarma to happen. Pachana means digestive therapy, during this therapy, cleansing is achieved by the ingestion of various herbs and decoction, which are Pungent, bitter in taste and hot in potency, depending upon ama condition. These herbs stimulate the metabolism, increase peristalsis, and improve circulation. Many of these herbs are antibacterial in activity, some enhance the immune system. These herbs are Triphala, Trikatu, Turmeric, Chitrak, Pippali, Black pepper, Fennel.