Chuan Xiong Granules (6:1)

Chuanxiong Rhizoma enters the Liver channel to warm and unblock the blood vessels, yet its acrid flavor and its relatively light material substance enable it to promote the movement of qi at the blood level. This also allows it to disperse qi stagnation and externally-contracted wind. In so doing, it reaches upward to the head and eyes, outward to the muscles and skin, and laterally to the joints of the limbs.* (from Chinese Herbal Medicine Materica Medica, 3rd ed)