Siddha Medicine (Tamil Citta-or Tamiḻ-maruttuvam) is a system of traditional medicine originating in Tamil Nadu in South India.Traditionally, it is taught that the siddhars laid the foundation for this system of medication.ccording to the Siddha medicine system, diet and lifestyle play a major role in health and in curing diseases. This concept of the Siddha medicine is termed as pathiyam and apathiyam, which is essentially a list of do's and don'ts.