An herbal tea, tisane, or ptisan is any herbal infusion other than from the leaves of the tea bush (Camellia sinensis). The English word "tisane" originated from the Greek word πτισ?νη (ptisan?), a drink made from pearl barley.

Herbal teas can be made with fresh or dried flowers, leaves, seeds or roots, generally by pouring boiling water over the plant parts and letting them steep for a few minutes. Seeds and roots can also be boiled on a stove. The tisane is then strained, sweetened if so desired, and served.