Siddha comes from the word 'Siddhi' which is means 'perfection' or 'eternal bliss'. These are referred to as the supernatural powers which gave the ancient saints the designation of Siddhars. By the virtue of these powers, Siddhars employed their knowledge for the benefit of the mankind. They found and developed the Siddha system of medicine, which is highly therapeutic in nature. With the help of this system they classified 4,448 diseases and varied medicines.
The medicines with therapeutic value utilized herbs, roots, salts and
even toxicity reduced poisons to treat rare array of diseases. The
origin of Siddha system is attributed to sage Agastiyar. It is also
believed that before the Aryan occupation of the Sind region and the
Gangetic plain, Tamirapani, a highly organized civilization, dwelled on
the banks of River Kaveri. This civilization is considered to be the
source of Siddha system.
With course of time, other systems in North helped it to grow, enriching
it further. Although it still maintains its authenticity as it uses many
such things which do not find relevance in the ancient system of
Ayurveda. The materia medica of Siddha comprises of medicines made from
metals and minerals. However, there is no mention of any use of metals
and minerals in Ayurveda. Siddha text clearly specifies use of mercury,
sulphur, copper, arsenic and gold as therapeutic agents.
Moreover, apart from being called as one of the most ancient medicine
systems of the country, it can also be ascribed as one of the most
advanced systems in all. This is attributed to the fact that Tamil
Siddhars wrote about AIDS, thousands of years back. Further more, the
Siddha System is capable of treating chronic diseases especially
arthritis, skin problems urinary tract disorders, infertility ,
degenerative disorders like osteo arthritis , Senile Dementia,disease of
the liver, medicinally treatable Spinal disorders ,general debility
,diarrhoea and intractable allergic disorders.