Tonic wine is a fortified wine that is often infused with various herbs, spices, and sometimes additional alcohol. It is typically sweet and has a higher alcohol content than regular wine. Historically, tonic wines were believed to have medicinal properties and were used to promote health and vitality. One of the most famous examples of tonic wine is Dubonnet, which combines red wine with herbs and spices. Tonic wines are often enjoyed as aperitifs or used in cocktails, providing a unique flavor profile that can enhance various drinks.