In traditional Chinese medicine, ginseng is made into a tea to treat various stomach and nervous disorders. American Ginseng (P. quinquefolium) has also been used for stomachaches and as an appetite stimulant.

References:

Grieve, M. (Maud). A Modern Herbal; the Medicinal, Culinary, Cosmetic and Economic Properties, Cultivation and Folk-Lore of Herbs, Grasses, Fungi, Shrubs, & Trees with All Their Modern Scientific Uses. New York :Harcourt, Brace & company, 1931.