Synopsis Asavas and Aristas are ayurvedic medicine that are generally prepared by soaking the drugs in water or boiling it in the form of decotion with sugar, honey or jaggery and mixed with certain herbs such as dhaiphool or madhukapusp used for fermentation. They are generally kept for one to two months for fermentation generaing alcohol. These medicines can be kept for indefinite period without destroying its medicinal value. This is the basic reason that Asava and Arishtas are prepared since juice or decoction or any other liquid cannot be kept for longer periods. It is said that older the Asava and Arishta more its medicinal value.