What are the side effects of Banlangen (Isatis root)?
Generally, the dosage forms of Banlangen include granules, oral liquid, tablets, etc. Possible side effects of Banlangen may include dry and itchy skin, allergic reactions, gastrointestinal discomfort, kidney damage, and nervous system damage. It is recommended to use this medication under the guidance of a physician. Detailed analysis is as follows:

1. Dry and Itchy Skin
Active substances in Banlangen, such as indirubin and indigo, may irritate the skin, causing symptoms such as dryness and itching. Therefore, skin changes should be monitored during the use of Banlangen, and medical attention should be sought promptly if any discomfort occurs.
2. Allergic Reactions
Since Banlangen is a patent Chinese medicine made from plants, patients with allergic constitutions may experience allergic reactions after taking large doses. Symptoms of allergic reactions may include dizziness, blurred vision, shortness of breath, and palpitations. Severe cases may experience symptoms such as decreased blood pressure and life-threatening anaphylactic shock.
3. Gastrointestinal Discomfort
Banlangen has a relatively cold nature. If taken in large quantities over a prolonged period, it may irritate the gastrointestinal tract when the liver's detoxification capacity decreases, leading to digestive symptoms such as stomach pain, loss of appetite, nausea, vomiting, and diarrhea.
4. Kidney Damage
Certain components in Banlangen, such as platycoside, may cause damage to the kidneys. Long-term or excessive use of Banlangen may lead to abnormal kidney function, manifested as reduced urine output and dark-colored urine. Therefore, patients with kidney disease or impaired kidney function should use Banlangen cautiously.
5. Nervous System Damage
Components in Banlangen, such as amino acids and quinazolinones, may affect the nervous system. Some patients may experience nervous system-related symptoms, such as dizziness and headaches, after taking Banlangen. Although these symptoms are usually mild and temporary, they still require attention from patients.
During the use of Banlangen, adequate rest should be ensured to avoid excessive fatigue. Patients should consume more foods rich in vitamins and avoid spicy and irritating foods. If any discomfort occurs, timely medical evaluation and consultation with a physician are advised.