Step 1: Understanding the Concept:
Asavas and Arishtas are traditional Ayurvedic liquid dosage forms. They contain self-generated alcohol which acts as a preservative and aids in the extraction and absorption of active principles.
Step 2: Detailed Explanation:
1. Arishta Preparation: A decoction (kwath) is first made by boiling crude drugs in water. This decoction is then filtered, and sugar or honey is added along with a fermenting agent (like \textit{Dhataki} flowers).
2. Fermentation: The mixture is sealed in a container and allowed to undergo natural fermentation for a specified period. The result is a clarified, fermented liquid.
3. Difference from Asava: In Asavas, the fermentation is done directly on the cold extraction of raw drugs (without boiling/decoction).
Step 3: Final Answer:
Arishtas are classified as hydro-alcoholic liquid formulations produced through the process of natural fermentation.