Er Long Zuo Ci Wan

What It Is

Er Long Zuo Ci Wan (二龙左慈丸), sometimes translated as “Pill for Deafness from Left [Side] by Master Ci”, is a traditional Chinese herbal formula. It originates from classical Chinese medicine texts and has been used for centuries to treat ear-related conditions such as tinnitus (ringing in the ears), hearing loss, and dizziness associated with internal imbalances.

The formula is composed primarily of Rehmannia root (Shu Di Huang) as its chief ingredient, supported by a combination of herbs such as Cornus officinalis (Shan Zhu Yu), Dioscorea opposita (Shan Yao), Alisma orientalis (Ze Xie), Poria cocos (Fu Ling), Moutan cortex (Mu Dan Pi), Magnetitum (Ci Shi), and sometimes others depending on the manufacturer.

It is traditionally classified under the category of Kidney- and Liver-tonifying formulas, particularly those that nourish yin and subdue yang. It’s often used when ear disorders are believed to stem from deficiencies or imbalances in the Kidney and Liver systems, according to Traditional Chinese Medicine (TCM) theory.

How It Works

From a TCM perspective, Er Long Zuo Ci Wan works by replenishing Kidney and Liver Yin, while simultaneously anchoring hyperactive Yang energy.

In TCM, the Kidneys are thought to “open to the ears” and govern hearing, while the Liver maintains the smooth flow of Qi and stores blood that nourishes the sensory organs. When the Yin energy (cooling, nourishing essence) of these organs is deficient, it allows Yang (active, hot energy) to rise excessively — leading to symptoms like tinnitus, dizziness, or gradual hearing loss.

Er Long Zuo Ci Wan nourishes the Yin to restore balance and uses ingredients like Magnetitum (Ci Shi) to anchor and calm the spirit, helping reduce symptoms of ear ringing and restlessness. The herbs work synergistically to:

• Tonify Kidney Yin (Rehmannia, Cornus, Dioscorea)
• Drain excess Fire and calm hyperactive Yang (Moutan Cortex, Alisma)
• Stabilize essence and fluids to prevent further deficiency
• Anchor Yang and improve ear function (Magnetitum)

From a biomedical viewpoint, although more modern research is limited, some studies suggest that Er Long Zuo Ci Wan may improve microcirculation in the inner ear, reduce oxidative stress, and support auditory nerve function, thereby helping to alleviate symptoms of tinnitus and sensorineural hearing loss.

Why It’s Important

Er Long Zuo Ci Wan remains an important formula because it addresses a common yet difficult-to-treat condition — chronic tinnitus and age-related hearing loss — using a holistic, body-strengthening approach rather than merely masking symptoms.

Its importance lies in its dual action: it not only targets ear symptoms but also treats the underlying systemic imbalance that contributes to them. In older adults or individuals experiencing fatigue, dizziness, or forgetfulness along with ear problems, it provides a means of supporting overall vitality and inner balance.

The formula is also valued because it represents one of the classic TCM strategies for managing degenerative conditions tied to aging or stress — by nourishing the body’s fundamental essence (jing) and preventing the escalation of internal heat and restlessness.

Considerations

While Er Long Zuo Ci Wan is widely used and generally considered safe when prescribed correctly, several important considerations apply:

Proper Diagnosis:

• It is intended for ear problems due to Kidney and Liver Yin deficiency, not for all kinds of tinnitus or hearing loss. If symptoms are caused by infection, earwax blockage, or vascular issues, this formula may not be appropriate.

Possible Side Effects:

• Mild digestive discomfort or fatigue may occur in some individuals, especially if taken in large doses or for extended periods. Those with Spleen Qi deficiency (signs include poor appetite or loose stools) may find it too rich or cloying.

Interactions and Precautions:

• It should be used with caution if you are taking other herbal tonics or prescription medications, as the combined effects may alter absorption or metabolism.
• Pregnant or breastfeeding women should use it only under professional guidance.
• Those with acute infections or inflammatory ear conditions should avoid it until the condition stabilizes.

Quality and Source:

• As with all traditional remedies, herbal quality and authenticity matter greatly. Users should choose products from reputable manufacturers that follow GMP standards and avoid unverified online sources.

Duration and Monitoring:

• The effects are typically gradual; consistent use over weeks or months under a practitioner’s supervision yields the best results. It’s also advisable to monitor blood pressure and hearing function during long-term use, particularly for elderly patients.