Review on Classical Preparatory Methods of Rasa Dravyaas

The Ayurveda term Rasashaastra merely involves science of mercury (Parada). This specialized modality works around mineral, metal and precious elements. The drugs or raw materials utilized under category of Rasashaastra are known as ‘Rasa dravyaas’. These drugs offer several therapeutic responses and imparts excellent pattern of drug absorption, assimilation and quick action. Rasa dravyaas are utilized for treating diseases of skin, digestive system, respiratory system, reproductive system and excretory system, etc. The metal and mineral based products are prepared using specific procedures of purification, mixing, heating, incineration and size reduction, etc. The procedures involves in the preparation of these drugs provides particular characteristics in formulation therefore it is very essential to prepare Rasa dravyaas as per the specified protocol with great precaution, the error in preparation of Rasa dravyaas can hamper quality of drugs and also responsible for adverse reaction. Thus ancient Ayurveda philospher advocated that a learned person should involve in the preparation of Rasa dravyaas with quality check in each step. Present article explores classical preparatory methods of Rasa Dravyaas. Keywords: Ayurveda, Rasashaastra, Rasa dravyaas, Parada