In Ayurvedic medicine, the compilation of traditional ancient Indian medicine practice is called rasaśāstra (रसशासत्र ), which details processes by which various metals, minerals and other substances, including mercury, are purified and combined with herbs in an attempt to treat illnesses. Rasashastra is a pharmaceutical branch of Indian system of medicine which mainly deals with the metals, minerals, animal origin product, toxic herbs and their use in therapeutics.
History of development
The credit of developing rasashastra as a stream of classical Ayurveda, especially in fulfilling its healthcare-related goals, goes to Nāgārjuna (5th century CE).
Classical textbooks
Rasendra Mangala
It was composed by Nāgārjuna Siddha in the Sanskrit language. P. C. Rây considered this work (which he erroneously called Rasaratnākara) to be amongst the earliest surviving alchemical works, perhaps from as early as the 7th or 8th century. The text actually dates to the 12th century. Rasendramangala originally comprised eight chapters, only four of which are found in the manuscripts available today. Manuscripts of the work are found at Gujarat Ayurveda University, Jamnagar, at Rajasthan Prachya Vidya Pratishthan, Govt. office Bikaner and elsewhere. An edition and translation was published in 2003.
Rasa Hridaya Tantra
It was created by Shrimad Govind Bhagvatapad, guru of Shankaracharya, around in the 10th century. It contains elaborate description of dhatuvada ( metallurgical processes to transform mercury into higher metals as gold or silver). A Sanskrit commentary on this text was contributed by Shri Chaturbhuj Mishra under the name of Mugdhavabodhini.
Rasarnava
Edited and published in 1908–1910. Written by Bhairava.
Rasa Prakasha Sudhakara
It is a 13th-century text by Acharya Yashodhar Bhatt. It was first published by Acharya Yadavji Trikam in 1910. Its second edition was published in 1912 under guidance of Shri Jivaram Kalidas Vyas. It contains 13 chapters describing both Lauhavad (use of metallurgical processes to convert lower metals to higher metals), and Chikitsavad ( use of metals and minerals for therapeutic use). It also describes the origin of mercury, its properties, 18 samskaras (processing techniques) of mercury as well as the tools and techniques involved in them.
Rasendra Chudamani
It was created by Aacharya Somadeva approximately in 12th–13th century. It contains 13 chapters which give elaborate description of mercury and its processing for medicinal use; definition and description of equipments and Puta (temperature requirements and regulation during processing). It can be inferred that at the time of its creation the Gurukula system of education was prevalent as it contains description about Shishyopnayana samskara ( ritual performed at the time of admission ). Specific contribution of this text include high degree of organization followed during compilation and description of 64 divya-aushadis (drugs with miraculous effect) for the very first time.
Rasa Ratna Samuccaya
It was created by Vāgbhaṭa, son of Vaidyapati Siṃhagupta, around the end of the 13th century or beginning of the 14th century. It contains around 30 chapters. It is considered one of the best treatises written in the field of rasashastra. It contains vivid description of Yantras (tools, equipments), Puta (temperature related processing details), classification of metals and minerals into Rasa, Uprasa, Lauha, Dhatu, Updhatu etc. as well as their processing details. It also describes clinical aspects of Rasa aushadhis. However, it is not considered as an original text. Rather it is considered as a compilation of works of other Acharyas. Though it may contain some original work of Vagbhatta, but it is difficult to differentiate. It derives much of its contributions from Rasendrachudamani of Somadeva. Rasaprabha and Vijnanbodhini are two of the Hindi commentaries available. Saralarthprakashini is one of the Sanskrit commentary available by Sriyut Shastri Khare.
Methods
The methods of rasashastra are contained in a number of Ayurvedic texts, including the Charaka Samhita and Susruta Samhita. An important feature is the use of metals, including several that are considered to be toxic in evidence-based medicine. In addition to mercury, gold, silver, iron, copper, tin, lead, zinc and bell metal are used. In addition to these metals, salts and other substances such as coral, seashells, and feathers are also used.