What is "drakshasava"

Drakshasava ( Sanskrit: द्राक्षासव) is a traditional Ayurvedic tonic made from grapes. Drakshasava is a weak wine because the grape juice is usually only partially fermented. It is also sometimes prepared by using raisin concentrate. The tonic is claimed to be beneficial for maladies such as lethargy, weakness and heat exhaustion. Drakshasava is believed to address health imbalances arising from an excess of the Vata-Vayu Dosha in the Ayurvedic system.