Quick Summary

Paeonia lactiflora, commonly known as Peony, is a traditional Chinese medicinal herb frequently included in botanical formulas. It has been studied in various clinical contexts such as autoimmune diseases, chronic pain, irritable bowel syndrome (IBS), rheumatoid arthritis, and neurological disorders. Evidence from systematic reviews and meta-analyses suggests it may have immunomodulatory, anti-inflammatory, and potential symptomatic benefits when used alongside conventional therapies. However, these findings are often limited by low to moderate quality of evidence and methodological concerns. Safety profiles appear favorable with low incidence of adverse effects, though comprehensive safety data specific to Paeonia lactiflora alone are limited. Further high-quality, rigorously designed randomized controlled trials are needed to confirm efficacy and safety.

What Is It?

Paeonia lactiflora is a perennial flowering plant native to China and widely used in traditional Chinese medicine (TCM). The root of the plant is the part most commonly utilized for medicinal purposes. It is often included in multi-herb formulas rather than used as a standalone treatment.

Traditional Uses

  • To modulate immune function and support treatment of autoimmune conditions
  • To alleviate symptoms related to chronic pain and inflammatory disorders
  • As a component in formulas for irritable bowel syndrome, particularly diarrhea-predominant IBS
  • To provide supportive care in neurological disorders and mental health conditions
  • Used in combination with other herbs for diseases such as Graves’ disease and ankylosing spondylitis

Active Compounds

The key bioactive constituents include total glucosides of paeony (TGP), which are believed to contribute to immunomodulatory and anti-inflammatory effects. Other phytochemicals in the root may also participate in its pharmacological activity, but the precise mechanisms remain under investigation.

Potential Benefits with Evidence Levels

  • Improvement of immune function and clinical symptoms in autoimmune diseases such as rheumatoid arthritis and systemic lupus erythematosus – Low to Moderate certainty based on meta-analyses of randomized controlled trials using TGP extracts.
  • Symptomatic relief in irritable bowel syndrome (IBS), particularly diarrhea-predominant IBS – Suggestive evidence from meta-analysis of Chinese herbal formulas with Peony as a core herb; overall evidence quality is low.
  • Enhancement of outcomes when used adjunctively with conventional treatments in conditions including chronic pain, cerebral palsy in children, and depression (notably in breast cancer patients) – Preliminary evidence with study design and population limitations.
  • Potential neuroprotective and anti-inflammatory effects in neurodegenerative disease models – supported primarily by preclinical and mechanistic studies; human evidence is limited and indirect.
  • Improved clinical response and reduced inflammatory markers when used as part of combination TCM formulas for Graves’ disease and ankylosing spondylitis – Low certainty evidence from meta-analyses of randomized trials.

Side Effects

Adverse effects reported in clinical studies using Peony-containing preparations are rare and generally mild, most commonly minor gastrointestinal discomfort. Serious adverse events specific to Paeonia lactiflora have not been reported in available randomized controlled trials and meta-analyses. However, detailed safety data for Peony monotherapy and long-term use remain limited.

Drug Interactions

There is currently insufficient high-quality evidence regarding drug interactions specific to Paeonia lactiflora. Some TCM formulations including Peony have been used safely in combination with Western medicines. Due to potential immunomodulatory effects, caution may be warranted, although no well-documented harmful interactions have been reported.

Who Should Avoid It

  • Individuals with known allergies to Peony or related botanicals should avoid use.
  • Use should be cautious or avoided in people with severe immunosuppression or concurrent autoimmune diseases unless supervised by a healthcare provider.
  • Pregnant or breastfeeding women are advised to avoid use or consult a healthcare professional before using Peony due to lack of sufficient safety data.

Evidence Limitations

Most clinical studies involve complex traditional Chinese medicine formulas or extracts containing Paeonia lactiflora rather than isolated Peony products, limiting clear attribution of effects. Many studies suffer from methodological limitations such as small sample sizes, lack of blinding, short treatment duration, and are predominantly conducted in Chinese populations, which may affect generalizability. Safety data are limited and often incompletely reported, with long-term effects unclear. Translational gaps exist between promising preclinical mechanisms and confirmed human clinical efficacy.

References

Last Reviewed

June 2024

Disclaimer: This information is provided for educational purposes only and is not intended to replace professional medical advice, diagnosis, or treatment. Always consult a healthcare professional before starting any new herbal supplement, especially if you have underlying health conditions or are taking prescription medications.