Can patients with IgA nephropathy take Rehmannia glutinosa (Shu Di Huang)?

　　IgA generally refers to IgA nephropathy. If the patient's physical condition permits, they can usually take prepared rehmannia (Shudihuang). However, if the condition is severe with impaired kidney function, it is generally not advisable. If any discomfort symptoms occur, it is recommended to seek medical attention at a hospital promptly and follow the doctor's instructions for management.

　　Prepared rehmannia is a traditional Chinese herb known for nourishing yin and benefiting the kidneys, as well as enriching blood and calming the mind. For patients with IgA nephropathy, if kidney function remains relatively stable, without significant symptoms such as edema or hypertension, and no other contraindications like a damp-heat constitution, moderate use of prepared rehmannia might help alleviate symptoms caused by kidney deficiency, such as soreness and weakness of the waist and knees, dizziness, and tinnitus.

　　Although prepared rehmannia offers certain regulatory benefits for IgA nephropathy patients, it may not be suitable for everyone. Particularly for patients with more severe conditions, such as significant proteinuria, hematuria, or renal insufficiency, medication should be used cautiously under the guidance of a qualified physician. In such cases, sudden or excessive intake of prepared rehmannia might increase the burden on the kidneys and negatively affect disease management and treatment.

　　It is also important to maintain healthy lifestyle and dietary habits to support treatment and promote recovery.