I find it hard to identify my favorite Ayurvedic remedy but if I must pinpoint a wonder-drug then honey is probably the first that comes to mind. The health benefits of honey are plenty, it has been used as a medicine for centuries.
Extremely high in antioxidants, honey is a great immune booster and has huge benefits for almost every dosha. Moreover, its soothing quality makes it perfect for healing wounds. Ayurvedically speaking, it has been used for situations related to internal or external bleeding.
The Honey Book is a highly recommended read about the health benefits of honey.