Nourishes heart yin and blood, calms shen, resolves heart phlegm, and disperses heat in the upper burner. Use for insomnia, anxiety, mental restlessness, palpitation and restlessness with dryness of mouth or lips. Function: Nourish blood; strengthen heart, tonify qi; calm spirit Application: Use to relieve def. heart syndrome due to def. blood. Symptoms: Low energy, chills, cold limbs, palpitations, insomnia, headache, dizziness, poor memory, agitation, nightmares, a pale face. Use to relieve neurasthenia with the above-mentioned symptoms and climacteric or menopausal syndrome. Caution: Acorus (gramineus) rhizome is a close relative of Acorus calamus, which is prohibited as a toxic herb by the U.S. Food and Drug Administration.