TCM Properties

Traditional Use

Dispels wind-dampness and strengthens tendons and bones — used for rheumatic and rheumatoid arthritis, lower back and knee weakness, soreness, and bi-syndrome from wind-cold-dampness
Tonifies the Kidney and helps Kidney grasp Lung Qi — used for chronic asthma, wheezing, and respiratory weakness from Kidney failing to grasp Qi
Stops bleeding — used for abnormal uterine bleeding, vomiting blood, nosebleeds, and traumatic hemorrhage
Nourishes the Heart and stops excessive perspiration — used for palpitations, anxiety, and spontaneous or night sweating from Heart deficiency

Promotes blood circulation and regulates menstruation — used for menstrual irregularity with blood stasis
Addresses lumbar spondylosis, cervical spondylosis, bone hyperplasia, and sciatica as modern clinical extensions

Chimaphilin — primary naphthoquinone; anticancer against osteosarcoma and breast cancer cell lines; anti-inflammatory
Arbutin — phenolic glycoside; urinary antiseptic, antioxidant, and skin-protective activity
Hyperin and quercetin — flavonols with antioxidant, anti-inflammatory, and cardioprotective effects
Catechin and epicatechin — flavan-3-ols contributing to antioxidant capacity
Pyrolones A and B — novel tetralones with unique bioactive properties
2''-O-galloylhyperin — astringent flavonol glycoside with antioxidant activity

Anti-inflammatory and anti-rheumatic — widely used clinically for rheumatic and rheumatoid arthritis, bone hyperplasia, and sciatica; anti-inflammatory mechanisms confirmed in pharmacological studies (PMID 35932974)
Antioxidant — P. calliantha shows highest phytochemical content and antioxidant activity among Pyrola species; arbutin and hyperin drive free-radical scavenging (PMID 24796694)
Anticancer — chimaphilin induces apoptosis in multidrug-resistant osteosarcoma cell lines via IGF-IR signaling inhibition (PMID 35932974)
Cardiovascular protective — preclinical evidence for reducing lipids and protecting against ischemic injury

Pregnancy — contraceptive properties documented; may cause uterine and ovarian atrophy with prolonged use; avoid throughout pregnancy
Yin deficiency heat patterns — warm nature is contraindicated in heat-excess conditions without cold-damp component

Prolonged use may affect reproductive hormone function — use under practitioner supervision for extended courses
MSK page not found — drug interaction data not available from Memorial Sloan Kettering integrative medicine database