Rasashastra primarily deals with the preparation of medicinal formulations using minerals, metals (Gold, silver, copper, iron etc.), and certain toxic substances. It involves sophisticated processes to purify and detoxify these substances, rendering them safe for therapeutic use. Bhaishajya Kalpana, on the other hand, focuses on the preparation and formulation of herbal medicines, including both single herbs and complex herbal formulations. And also deals with fields like Pharmacognosy, Pharmaceuticals, Neutraceuticals, and Pharmacology, they have their unique focus and methodologies.