The Department of Rasashastra and Bhaishajya Kalpana in Ayurveda colleges focuses on the pharmaceutical science of manufacturing, purifying, and processing herbal, mineral, and metal-based medicines. It trains students in classical methods like shodhana (purification) and marana (calcination) to create safe, effective, and standardized Ayurvedic formulations, adhering to GMP (Good Manufacturing Practices) standards.