Chinese Foxglove, Chinese Rehmanniae Radix, Chinese RR, Di Huang, Dihuang, Gun-Ji-Whang, Japanese Rehmanniae Radix, Japanese RR, Jio, Juku-Jio, Kan-Jio, R. Glutinosa, Racine de Rehmannia, Radix Rehmanniae, Rehmanniae, Rehmannia Glutinosa Oligosaccharide, Rehmannia glutinosa, Rehmannia Radac, Rehmanniae Radix, Rehmanniae Root, RR, Rhemannia Root, Rehmannia Steamed Root, RGAE, RGX, ROS, Saeng-Ji-Whang, Sheng Dihuang, Sho-Jio, Shu Di Huang, Shu Dihuang, Sook-Ji-Whang, To-Byun, Xian Dihuang.


Overview Information

Rehmannia is a plant. The roots of the plant are used to make medicine. Rehmannia is commonly found in herbal combinations used in Traditional Chinese Medicine.

Rehmannia is used for diabetes, metabolic syndrome, obesity, kidney disease, chronic obstructive pulmonary disease (COPD), "tired blood" (anemia), fever, weakened bones (osteoporosis), rheumatoid arthritis (RA), and allergies.

How does it work?

There is not enough information to know how rehmannia might work for any medical condition. However, some chemicals in rehmannia seem to affect the immune system and nervous system. Rehmannia might also reduce pain and swelling. Some chemicals in rehmannia seem to lower blood sugar levels.


Uses & Effectiveness?

Insufficient Evidence for

  • Anemia caused by bone marrow failure (aplastic anemia). Early research shows that taking rehmannia along with the drug stanozolol helps to improve symptoms of aplastic anemia better than stanozolol alone.
  • Kidney disease. Early research shows that taking rehmannia along with the drug irbesartan decreases the amount of protein in the urine better than irbesartan alone in people with long-standing inflammation of the kidneys (chronic glomerulonephritis)
  • Obesity. Early research shows that taking steamed rehmannia root extract decreases waist size in women who are obese. However, rehmannia does not seem to decrease body weight or body fat.
  • Diabetes.
  • Metabolic syndrome.
  • Fever.
  • "Weakened bones" (osteoporosis).
  • Allergies.
  • Chronic obstructive pulmonary disease (COPD).
  • As a general tonic.
  • Other conditions.
More evidence is needed to rate the effectiveness of rehmannia for these uses.

Side Effects

Side Effects & Safety

Rehmannia is POSSIBLY SAFE when taken by mouth for 8 weeks or less. There is not enough information available to know if rehmannia is safe to take for longer than 8 weeks.

Special Precautions & Warnings:

Pregnancy and breast-feeding: There is not enough reliable information about the safety of taking rehmannia if you are pregnant or breast-feeding. Stay on the safe side and avoid use.

Diabetes: Since rehmannia might affect blood sugar levels, people with diabetes should avoid or be very cautious about taking rehmannia. If you have diabetes and take rehmannia, monitor your blood sugar carefully.

Surgery: Because rehmannia might affect blood glucose levels, it might interfere with blood sugar control during and after surgery. Stop using rehmannia at least 2 weeks before a scheduled surgery.



Moderate Interaction

Be cautious with this combination

  • Medications for diabetes (Antidiabetes drugs) interacts with REHMANNIA

    Rehmannia might decrease blood sugar. There is concern that taking rehmannia with other medications for diabetes might cause blood sugar to decrease too much. Monitor your blood sugar closely. The dose of your diabetes medication might need to be changed.
    Some medications used for diabetes include glimepiride (Amaryl), glyburide (DiaBeta, Glynase PresTabs, Micronase), insulin, pioglitazone (Actos), rosiglitazone (Avandia), chlorpropamide (Diabinese), glipizide (Glucotrol), tolbutamide (Orinase), and others.



The appropriate dose of rehmannia depends on several factors such as the user's age, health, and several other conditions. At this time there is not enough scientific information to determine an appropriate range of doses for rehmannia. Keep in mind that natural products are not always necessarily safe and dosages can be important. Be sure to follow relevant directions on product labels and consult your pharmacist or physician or other healthcare professional before using.

View References


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  • Liu, J. Q. and Wu, D. W. [32 cases of postoperative osteogenic sarcoma treated by chemotherapy combined with Chinese medicinal herbs]. Zhongguo Zhong.Xi.Yi.Jie.He.Za Zhi. 1993;13(3):150-2, 132. View abstract.
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