Oil – Oils like olive, almond and jojoba (which is not technically an oil, but a liquid wax) extract fat soluble constituents of medicinal herbs.
Alcohol – Various kinds of alcohol such as vodka and brandy are used to create high quality medicinal tinctures.
Vinegar – Vinegar also creates medicinal tinctures, especially suitable to herbs with high mineral content.
Honey – Raw honey makes marvelous herbal medicine, especially when using aromatic herbs.
Water – Teas are a very common way to create and take herbal medicine. Water is a wonderful way to extract many of the medicinal constituents of herbs.