What is the Difference Between Siddha and Ayurvedha?
Sidha medicine is essentially the medicine of Tamilnadu in India. All the original literature of Sidha medicine is in Tamil and has been written in verse by the eighteen sidhars. This system of medicine is practiced almost exclusively in Tamilnadu.
The neighbouring South Indian state of Kerala is home to many famous Ayurvedic physicians and in a sense has preserved the rich traditions of Ayurveda for the future. The Kottakkal Arya Vaidya Sala and Arya Vaidya Pharmacy are two internationally reputed institutions of Ayurveda.
While most of the herbs used are common to both systems, sometimes they are used for different illnesses. For eg. Hibiscus is an important medicine for heart ailments in Sidha while, to my knowledge, in Ayurveda it is mostly used for hair related problems.