Hidden Tiger Pill
Nourish & Tonify the Yin
Enriches the Yin, Causes Fire to Descend, and Strengthens the Sinews and Bones
Teachings of Zhu Dan-Xi
Weakness of the lower back and knees, deterioration of the sinews and bones with general reduction in function, wasting of the muscles of the legs and feet, difficulty in walking, a red tongue with little coating, and a thin, frail pulse.