Bai Shao (White Peony Root)

Chinese Herb Actions

Chinese Herb Dosage

• What is the typical dosage of Bai Shao (White Peony Root)?

  Roughly 5–10 g in decoction, up to about 30 g in severe cases — the higher end is traditionally reserved for pronounced spasm, cramping, or pain where a stronger softening/relaxing effect is needed. This is consistent with standard materia medica ranges for the herb.

  Materia medica sources also describe processed forms — raw Bai Shao versus dry-fried (chao bai shao) or wine-fried preparations — used to moderate its sour, cooling nature depending on whether the emphasis is on calming Liver yang/nourishing yin or on relaxing spasm; specific processing choice is a practitioner-level decision.

  Source: Sacred Lotus reference content; standard materia medica dosage ranges. Reference only — not a prescription.

Chinese Herb Combinations:

Chinese Herb Contraindications & Cautions

• Are there cautions for Bai Shao (White Peony Root)?

  Bai Shao is cooling and sour/astringent by nature — it is traditionally contraindicated in Yang deficiency with cold in the Middle Jiao presenting as diarrhea, since its cooling, astringing quality can aggravate a cold, weak digestion. It is also traditionally avoided where an External Wind-type rash or eczema has not yet fully erupted (astringing could trap the pathogen), and in postpartum cases with active bleeding or blood stagnation.

  • Sedation (reference note) — the herb may cause sedation or drowsiness in some individuals; caution is advised for patients operating machinery.
  • Classical incompatibility — Shao Yao (Bai Shao/Chi Shao) is listed among the traditional “Eighteen Incompatible Medicaments” as incompatible with Li Lu (Veratrum root and rhizome); the two are not traditionally combined.

  Source: Sacred Lotus reference content; classical incompatibility per Sacred Lotus herb-caution cross-reference (Li Lu ↔ Bai Shao) and the traditional Eighteen Incompatible Medicaments (shi ba fan). Reference only, not a safety guarantee.

Chinese Herb Toxicity & Overdose

• Low. Bai Shao (Radix Paeoniae Alba) is not classified as a toxic or endangered herb in Chinese materia medica and has a long history of dietary and medicinal use. Clinical research on Total Glucosides of Paeony (TGP), a standardized extract of paeoniflorin and related compounds from the same root, reports a generally favorable tolerability profile in rheumatoid-arthritis trials, with mild gastrointestinal upset the most commonly noted adverse effect; this reflects the isolated extract used in those studies rather than the whole decocted herb.

  Source: materia medica consensus (herb not flagged toxic/endangered); TGP tolerability per PMID 28917375 (systematic review of RCTs). Reference note, not a safety guarantee.

Herb-Drug Interactions

• No well-established interactions are documented for the raw decocted herb. Separately, clinical trials of Total Glucosides of Paeony (TGP) — a standardized paeoniflorin-rich extract from the same Paeonia lactiflora root — combined with the conventional DMARDs methotrexate and/or leflunomide for active rheumatoid arthritis found that adding TGP was associated with reduced treatment-related hepatotoxicity while maintaining or improving clinical response, rather than an adverse interaction. This is standardized-extract research, not evidence about the whole raw herb in a decoction, and is noted here for practitioner awareness rather than as guidance to combine.

  Source: PMID 23415907; PMID 26292180 (reduced hepatotoxicity, TGP + methotrexate/leflunomide, active RA); PMID 31354242 (meta-analysis, efficacy and safety of the same combination).

Western / Biomedical Research

Chinese Herb Clinical Studies & Research

Provided as research context — a summary of published biomedical study, not a therapeutic or medical claim.

• Is there modern research on Bai Shao (Radix Paeoniae Alba)?

  Yes — an active research literature exists, concentrated on paeoniflorin and Total Glucosides of Paeony (TGP), a standardized extract of the same root, mostly for rheumatoid arthritis. Bai Shao’s principal studied constituent is paeoniflorin, a monoterpene glycoside, alongside related paeony glycosides.

  • Rheumatoid arthritis (systematic review of RCTs) — a 2017 systematic review of randomized controlled trials evaluated TGP for rheumatoid arthritis, summarizing effectiveness and safety across the available trial evidence.
  • Combination therapy with conventional DMARDs (meta-analysis) — a 2019 meta-analysis assessed TGP added to methotrexate and leflunomide for active RA, and earlier trials (2013, 2015) specifically reported that adding TGP reduced the hepatotoxicity associated with that drug combination while supporting clinical response.
  • Anti-inflammatory / immunoregulatory mechanisms (review) — a 2020 pharmacology review (Pharmacology & Therapeutics) describes how paeoniflorin and TGP modulate immune-cell function, reduce inflammatory mediator production, and act on signaling pathways relevant to autoimmune conditions including rheumatoid arthritis and lupus.
  • Broader pharmacology (comprehensive review) — a 2024 review in the Journal of Ethnopharmacology surveys the ethnopharmacology, phytochemistry, pharmacology, pharmacokinetics, and quality control of Paeonia lactiflora as a whole.

  Human clinical evidence is concentrated in rheumatoid arthritis using the standardized TGP extract, largely in Chinese-population trials; it should not be read as evidence for the traditional indications (blood/yin nourishment, menstrual regulation, spasm relief) of the whole decocted herb, which remain traditional-use knowledge.

  Sources: PMID 28917375 (systematic review, TGP for RA); PMID 31354242 (meta-analysis, TGP + methotrexate/leflunomide); PMID 26292180; PMID 23415907 (reduced hepatotoxicity, same combination); PMID 31836457 (anti-inflammatory/immunoregulatory review, Pharmacol Ther 2020); PMID 39053710 (comprehensive review, J Ethnopharmacol 2024). Research context, not a therapeutic claim.

Chinese Herb Notes

• How is Bai Shao (White Peony) different from Chi Shao (Red Peony), and what are its key combinations?

  Bai Shao (white peony root) nourishes and astringes — Chi Shao (red peony root) clears heat and moves blood. Though both come from the peony plant, Bai Shao is processed (boiled, peeled) to emphasize a sour, nourishing, yin-preserving action on Liver blood, while Chi Shao is left unpeeled and is used instead to cool the blood and invigorate blood stasis. In practice they represent near-opposite strategies for the Liver-blood system: Bai Shao tonifies and holds, Chi Shao clears and moves.

  Key two-herb combinations:

  • Bai Shao + Chai Hu — pairs Bai Shao’s blood-nourishing, yin-preserving action with Chai Hu’s Liver-qi-spreading action; the core relationship behind Xiao Yao San (Rambling Powder) and Si Ni San for Liver-qi constraint complicated by blood/yin deficiency.
  • Bai Shao + Chi Shao — combines the nourishing/astringing white peony with the heat-clearing/blood-moving red peony where a formula needs to both nourish and move blood, as in Wen Jing Tang.
  • Bai Shao + Gan Cao — the classic sour–sweet pairing of Shao Yao Gan Cao Tang (Peony and Licorice Decoction), used to relax spasm and stop pain of the abdomen and calves.

  Bai Shao also appears widely through the classical formulary, including Si Wu Tang and Ba Zhen Tang (blood-tonic base formulas), Gui Zhi Tang (harmonizes Ying and Wei), Dang Gui Shao Yao San, Tong Xie Yao Fang (painful diarrhea), Zhen Gan Xi Feng Tang and Ling Jiao Gou Teng Tang (subdue Liver wind), and Da Ding Feng Zhu / San Jia Fu Mai Tang (nourish yin, extinguish internal wind). (Traditional formula context, not treatment advice.)

  Source: Sacred Lotus herb-combination and formula cross-references; differentiation per Bensky & Barolet / Chen & Chen Materia Medica consensus.

This herb is incompatible with:

• Li Lu (Radix Et Rhizoma Veratri)