b. Indicated for the relief of anxiety, especially acute instances.
c. This tisane is described by some as having an earthy, bright flavour; although some are off-put by the valerian, which can be strong, overall it is taken well. I recommend this served hot if drinking as a tisane; as a tincture, it can be concentrated and preserved in portable vials for needed occasions, to be consumed in conjunction with other calming techniques such as mindful breathing.
Mix three parts yarrow to two parts spearmint. To one part each of passionflower, valerian, and lavender, add half as much cassia. Mix together.
Every bodily system will differ, but generally this tisane is suitable for long-term use. For a less intense but equally effective anxiety tisane, read the sleep tisane, here.
For those who cannot ingest lavender, you might substitute an equal amount of skullcap or wild lettuce; both are also nervines.
*The properties listed are more specifically for peppermint, for which spearmint can be substituted in this case.