Rasa oushadies are the potent Ayurvedic preparations mainly containing metals and minerals. These oushadies possess a wide range of therapeutic efficacy and are considered superior because of their qualities like small dose, quick action, palatability and longer shelf life. Tamra Yoga is an important Rasa oushadi described in Rasa Tantra Sara Va Siddha Prayoga Sangraha indicated for the management of the disease Vataja Shula, Gulma and Ajirna. The ingredients present in the "Tamra Yoga" are Tamra Bhasma, Yashtimadhu, Trikatu, Souvarchala Lavana, Chincha Kshara and Bharjitha Hingu. The main pharmaceutical procedures involved in the preparation of Tamra Yoga are Shodhana, Bhavana, Marana, Amrutikarana, Chincha Kshara nirmana, Hingubharjana, Churna nirmana and preparation of capsules of Tamra Yoga. The specific pharmaceutical blend of these contents can result in a more effective formulation. Till date, no research work has been carried out to standardize this formulation. Therefore the present study has been planned to standardize the method of preparation of Tamra Yoga according to the method explained in the classical literature.

The main objective of the present study is to investigate the antioxidant activity of Tamra Bhasma and Tamra Yoga. 2,2 -Diphenyl-1-Picrylhydrazyl (DPPH) scavenging assay has been used in the determination of In Vitro antioxidant activity. Increasing order of Percentage of Inhibition was seen in 100 µl, 200 µl, 300 µl, 400 µl and 500 µl sample concentrations in both Tamra Bhasma and Tamra Yoga. Tamra Bhasma showed 58.67% of inhibition and Tamra Yoga showed 55.47% of inhibition in 500 µl sample concentrations respectively. The present study revealed that both the Tamra Bhasma and Tamra yoga showed good antioxidant activity. Tamra Bhasma showed relatively higher antioxidant activity when compared to Tamra Yoga.

Kshara is an important preparation mentioned in Ayurvedic classics. Different methods have been described in Ayurvedic texts for the preparation of Kshara. The main aim of this study is to fix a Standard Procedure and to find out best method in the preparation of Chincha Kshara. Chincha Kshara has been prepared by the reference mentioned in Sarangadhara Samhitha 11/102-104. Three methods have been adopted in this study to know the difference in the amount of yield.The yield of Kshara depends on the number of washings. Highest yield was obtained from the sample in which repeated washings of the residue was done.