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Lao Er (Deafness due to Exhaustion) refers to a condition caused by the deficiency of Kidney Qi. The Foot-Shaoyin Kidney Meridian is the gathering point of numerous vessels, and its Qi connects to the ears. If the Kidneys are injured by overexertion, the Qi of these vessels becomes weak.

For treating Lao Er caused by Kidney Qi deficiency resulting in hearing loss, it is advisable to take Shugan Dihuang San (Prepared Rehmannia Powder).
Ingredients: Shu Gan Di Huang (Prepared Rehmanniae Radix, 1.5 liang), Cishi (Magnetitum, 1 liang, crushed and washed with water to remove red juice), Guixin (Cinnamomi Cortex, 1.5 liang), Fuzi (Aconiti Lateralis Radix Praeparata, 0.5 liang, processed until cracked, skin and umbilical scar removed), Fuling (Poria, 1 liang), Xiong (Chuanxiong Rhizoma, 1 liang).
Preparation and Administration: Crush and sieve the above ingredients into a powder. For each dose, first add one large cup and a half of water along with one pair of Yang Shen (Oviductus Ovis), remove the fatty membrane, cut them, and decoct until the liquid reduces to one cup. Remove the kidney pieces.

For treating Lao Er caused by Kidney Qi damage resulting in hearing loss, it is advisable to take Changpu San (Acorus Powder).
Ingredients: Chang Pu (Rhizoma Acori Tatarinowii, 1 liang), Tusizi (Semen Cuscutae, 1 liang, soaked in wine for three days, dried, and separately pounded into powder), Fuzi (Aconiti Lateralis Radix Praeparata, 1 liang, processed until cracked, skin and umbilical scar removed), Guixin (Cinnamomi Cortex, 1 liang).
Preparation and Administration: Pound the above ingredients finely and sieve through a fine mesh into a powder. Take one qian per dose, mixed with warm wine. Administer on an empty stomach and before evening meals, twice daily.

For treating Lao Er where long-term deficiency of the Zang-Fu organs and insufficient Kidney Qi lead to emaciation and weakness in the waist and legs, it is advisable to take Shuyu Wan (Dioscorea Pill).
Ingredients: Shu Yu (Dioscoreae Rhizoma, 1 liang), Shu Gan Di Huang (Prepared Rehmanniae Radix, 1 liang), Fuzi (Aconiti Lateralis Radix Praeparata, 1 liang, processed until cracked, skin and umbilical scar removed), Guixin (Cinnamomi Cortex, 1 liang), Tian Dong (Asparagi Radix, 1.5 liang, heart removed, dried), Yuan Zhi (Polygalae Radix, 1 liang, soaked in wine and dried).
Preparation and Administration: Pound and sieve the above ingredients into powder, mixing them evenly. Combine with refined honey and pound for five to seven hundred strokes to form pills the size of Sophora seeds. Take daily on an empty stomach with warm wine.

For treating Lao Er caused by Kidney Qi deficiency, manifesting as weakness in the waist and legs, dark complexion, emaciation, and frequent or slippery urination, it is advisable to take Rousongrong Wan (Cynomorii Pill).
Ingredients: Rou Cong Rong (Cynomorii Herba, 1 liang, soaked in wine overnight, wrinkled skin scraped off, roasted dry), Chang Pu (Rhizoma Acori Tatarinowii, 1 liang), Cishi (Magnetitum, 1 liang, heated red, quenched in vinegar seven times, crushed, ground, and wet-processed), Lu Rong (Cornu Cervi Pantotrichum, 1 liang, hair removed, coated with butter, roasted slightly yellow), Shan Zhu Yu (Fructus Corni, 1 liang, wrinkled skin removed, roasted slightly dry).
Preparation and Administration: Pound and sieve the above ingredients into powder. Combine with refined honey and pound for five to seven hundred strokes to form pills the size of Sophora seeds. Take thirty pills per dose on an empty stomach with warm wine, and after evening meals.

Yang Shen Fuzi Wan (Sheep Kidney and Prepared Aconite Pill) for treating Lao Er.
Ingredients: Fuzi (Aconiti Lateralis Radix Praeparata, 1.5 liang, processed until cracked, skin and umbilical scar removed), Cishi (Magnetitum, 1 liang, heated red, quenched in vinegar seven times, crushed, ground, and wet-processed), Niuxi (Achyranthis Bidentatae Radix, 1 liang, sprouts removed), Tusizi (Semen Cuscutae, 1 liang, soaked in wine, dried, heart removed).
Preparation and Administration: Pound and sieve the above ingredients into powder. Take five pairs of Yang Shen (Oviductus Ovis), remove the fatty membrane, finely chop and pound thoroughly. Add three sheng of wine, place in a silver pot, and simmer over low heat until it forms a paste.

Bu Shen Cishi Wan (Kidney-Nourishing Magnetite Pill) for treating Lao Er with Kidney deficiency, characterized by tinnitus resembling the sound of bells, chimes, wind, or rain.
Ingredients: Cishi (Magnetitum, 2 liang, heated red, quenched in vinegar seven times, crushed, ground, and wet-processed), Lu Rong (Cornu Cervi Pantotrichum, 2 liang, hair removed, coated with butter, roasted slightly yellow), Fuzi (Aconiti Lateralis Radix Praeparata, 1.5 liang, processed until cracked), Wu Wei Zi (Schisandrae Chinensis Fructus, 1 liang, washed with water to remove red juice), Shan Zhu Yu (Fructus Corni, 1.5 liang).
Preparation and Administration: Pound and sieve the above ingredients into powder. Combine with refined honey and pound for three to five hundred strokes to form pills the size of Sophora seeds. Take thirty pills per dose on an empty stomach with warm wine, and after evening meals.

Changpu San (Acorus Powder) for treating Lao Er causing ear blockage.
Ingredients: Chang Pu (Rhizoma Acori Tatarinowii, 0.5 liang), Shan Zhu Yu (Fructus Corni, 0.5 liang), Tu Gen (Radix Trichosanthis Kirilowii? Note: Text says Tu Gua Gen, likely Trichosanthes root or similar local herb, kept as Tu Gua Gen), Mu Dan Pi (Moutan Cortex, 0.5 liang), Niuxi (Achyranthis Bidentatae Radix, 0.5 liang, sprouts removed), Fuzi (Aconiti Lateralis Radix Praeparata, 0.5 liang, processed until cracked, skin and umbilical scar removed).
Preparation and Administration: Pound the above ingredients finely and sieve through a fine mesh into a powder. Use half a qian per application, wrap in cotton, and insert into the ear. Change once daily.