Plant Comparison

Witch Hazel vs Perforate St John’s-wort

A side-by-side comparison of two medicinal plants — every documented constituent, action, use, safety note and cited source, assembled automatically from the Omnia Sana database.

First plant
Second plant
Show:
Plant AWitch HazelHamamelis virginianaHamamelidaceaeFull monograph →
Plant BPerforate St John’s-wortHypericum perforatumHypericaceaeFull monograph →

At a glance

Witch Hazel and Perforate St John’s-wort: they share 5 indicated uses (arthritis / joint pain, bruising, inflammation (general), …); 3 pharmacological actions in common.

Witch HazelPerforate St John’s-wort
Constituents23
Pharmacological actions56
Indicated uses99
Safety notes22
Cited sources1631
Indicated uses
Only Witch Hazel
Cancer (anticancer research)DiarrhoeaHaemorrhoidsOral & throat health
Shared (5)
Arthritis / joint painBruisingInflammation (general)Skin irritationWounds
Only Perforate St John’s-wort
Cold & fluEczemaInfection (general)Insomnia / sleeplessness
Pharmacological actions
Only Witch Hazel
Anticancer (preclinical)Astringent
Shared (3)
Anti-inflammatoryAntioxidantVulnerary (wound healing)
Only Perforate St John’s-wort
AntiviralEmollient / skin-soothingSedative / sleep support

Evidence face-off — shared uses

ConditionWitch HazelPerforate St John’s-wortVerdict
Arthritis / joint pain5/101/10Stronger for Witch Hazel
Bruising1/101/10Comparable evidence
Inflammation (general)5/101/10Stronger for Witch Hazel
Skin irritation5/101/10Stronger for Witch Hazel
Wounds1/101/10Comparable evidence

Evidence scores (1–10) are computed from the tier of each cited source. “Comparable” means the two scores are within one point. Follow a score to its detailed sources.

Key Constituents

Tannins (4-10%, including hamamelitannin and gallotannins)[14, 15]

The principal astringent and anti-inflammatory constituents.

Tannins
Flavonoids, catechins, proanthocyanidins and phenolic acids[15]

Antioxidant and anti-inflammatory constituents of the bark and leaf.

ProanthocyanidinsPhenolic acidsFlavonoidsCatechins
Naphthodianthrones (hypericin, pseudohypericin)[4]

Red pigments historically used to standardise extracts; contribute to antiviral activity and are the compounds responsible for photosensitivity risk.

Phloroglucinols (hyperforin)[4]

Considered the principal compound behind the antidepressant activity and the main driver of the herb's potent CYP3A4/P-glycoprotein induction and drug-interaction profile.

Hyperforin
Flavonoids (hyperoside, quercetin, rutin)[4]

Antioxidant flavonoids contributing to overall activity.

FlavonoidsQuercetinRutin

Pharmacological Actions

Anti-inflammatory[2, 4, 5, 6, 14, 15, 16]

Anti-inflammatory and antioxidant (supports irritated/atopic skin); Relief of haemorrhoid symptoms (astringent and anti-inflammatory)

Anticancer (preclinical)[11]
Antioxidant[2, 15]

Anti-inflammatory and antioxidant (supports irritated/atopic skin)

Astringent[6, 8, 9, 14, 15, 16]

Astringent for skin irritation and minor inflammation of the skin and oral mucosa (tannins), applied topically; Relief of haemorrhoid symptoms (astringent and anti-inflammatory)

Vulnerary (wound healing)[7, 14, 16]

Vulnerary for minor wounds, bruises and insect bites

Anti-inflammatory[5, 15, 16]
Antioxidant[6, 15, 16]
Antiviral[15, 16]
Emollient / skin-soothing[15, 16]
Sedative / sleep support[1, 2, 4, 5, 9, 11, 12, 13, 14, 15, 16]
Vulnerary (wound healing)[4, 15, 16]

Traditional & Indicated Uses

Arthritis / joint pain[14, 15, 16]Moderate · 5/10

inferred from anti-inflammatory action

Evidence: 5
Label: Arthritis / joint pain
Bruising[14, 16]Traditional · 1/10

Vulnerary for minor wounds, bruises and insect bites

Evidence: 1
Label: Bruising
Cancer (anticancer research)[11]Traditional · 2/10

inferred from anticancer action

Evidence: 2
Label: Cancer (anticancer research)
Diarrhoea[14, 15, 16]Moderate · 5/10

inferred from astringent action

Evidence: 5
Label: Diarrhoea
Haemorrhoids[14, 16]Traditional · 1/10

Relief of haemorrhoid symptoms (astringent and anti-inflammatory)

Evidence: 1
Label: Haemorrhoids
Inflammation (general)[14, 15]Moderate · 5/10

Astringent for skin irritation and minor inflammation of the skin and oral mucosa (tannins), applied topically

Evidence: 5
Label: Inflammation (general)
Oral & throat health[14, 15]Moderate · 5/10

Astringent for skin irritation and minor inflammation of the skin and oral mucosa (tannins), applied topically

Evidence: 5
Label: Oral & throat health
Skin irritation[14, 15]Moderate · 5/10

Astringent for skin irritation and minor inflammation of the skin and oral mucosa (tannins), applied topically

Evidence: 5
Label: Skin irritation
Wounds[14, 16]Traditional · 1/10

Vulnerary for minor wounds, bruises and insect bites

Evidence: 1
Label: Wounds
Arthritis / joint pain[15, 16]Traditional · 1/10

inferred from anti-inflammatory action

Evidence: 1
Label: Arthritis / joint pain
Bruising[15, 16]Traditional · 1/10

inferred from vulnerary action

Evidence: 1
Label: Bruising
Cold & flu[15, 16]Traditional · 1/10

inferred from antiviral action

Evidence: 1
Label: Cold & flu
Eczema[15, 16]Traditional · 1/10

inferred from emollient action

Evidence: 1
Label: Eczema
Infection (general)[15, 16]Traditional · 1/10

inferred from antiviral action

Evidence: 1
Label: Infection (general)
Inflammation (general)[15, 16]Traditional · 1/10

inferred from anti-inflammatory action

Evidence: 1
Label: Inflammation (general)
Insomnia / sleeplessness[15, 16]Traditional · 1/10

inferred from sedative action

Evidence: 1
Label: Insomnia / sleeplessness
Skin irritation[15, 16]Traditional · 1/10

inferred from anti-inflammatory action

Evidence: 1
Label: Skin irritation
Wounds[15, 16]Traditional · 1/10

inferred from vulnerary action

Evidence: 1
Label: Wounds

Safety, Cautions & Contraindications

Safety note[16]Caution

For topical use. Do not apply to deep wounds, serious burns or severe rectal bleeding - these need medical care.

Safety note[15, 16]Caution

Oral use is not recommended in pregnancy or breastfeeding without professional guidance, and swallowing tannin-rich preparations can upset the stomach. Mild skin irritation or contact allergy is possible.

Safety note[15, 16]Caution

Significant drug interactions: strongly induces CYP3A4 and P-glycoprotein, reducing plasma levels of many drugs including oral contraceptives, antiretrovirals, cyclosporine, warfarin, and digoxin. May cause photosensitivity (fair-skinned individuals). Do not combine with SSRIs, SNRIs, or MAOIs (serotonin syndrome risk). Avoid in bipolar disorder.

Safety note[15, 16, 17]Caution

Duke (2002) rates St. John's wort as ++ (raised from earlier editions) and notes antidepressant, antiviral, antibacterial, and wound-healing activities at experimental and clinical levels. Hypericin and hyperforin are identified as key active constituents. Clinical evidence (score 2) confirms antidepressant efficacy in mild-to-moderate depression, and WHO/Commission E provide approval for this indication. Dose: 300 mg standardized extract (0.3% hypericin, 3–5% hyperforin) three times daily. Duke emphasizes the critical drug interaction: St. John's wort is a potent CYP3A4 inducer and can significantly reduce blood levels of many medications including oral contraceptives, cyclosporine, antiretrovirals, and warfarin. Avoid combined use with SSRIs (serotonin syndrome risk) and pharmaceutical antidepressants (Duke, 2002).

External Ids

Gbif: 3152827
Powo: urn:lsid:ipni.org:names:430697-1
Wikidata: Q913129
Gbif: 3189486
Powo: urn:lsid:ipni.org:names:433719-1
Wikidata: Q158289

Botanical Description

Large, multi-stemmed deciduous shrub or small tree with broad, oval, wavy-toothed leaves, asymmetrical at the base. Unusually, it flowers in late autumn to winter after the leaves have fallen, bearing clusters of small, spidery, bright yellow flowers with narrow, crinkled, ribbon-like petals. The woody seed capsule matures the following autumn and explosively ejects its seeds ('snapping hazelnut').[14]

Height: 3-8 m
Habit: Large, multi-stemmed deciduous shrub or small tree
Leaves: Broad, oval, wavy-toothed, asymmetrical at the base
Flowers: Small, spidery, bright yellow, with narrow crinkled ribbon-like petals, blooming in late autumn/winter
Stem: Multiple woody stems with smooth, grey-brown bark
Root: Woody root system
Fruit: Woody capsule maturing the following autumn, explosively ejecting seeds
Flowering Period: October-December (after leaf-fall)

Erect, branching perennial herb with paired, oval leaves dotted with tiny translucent oil glands that look like pinpricks when held to the light (giving the species name 'perforatum'). Bright yellow, five-petalled flowers with numerous stamens and black dots along the petal edges are borne in flat-topped clusters, and release a reddish pigment when crushed.[4]

Height: 30-90 cm
Habit: Erect, branching perennial herb
Leaves: Paired, oval, dotted with tiny translucent oil glands
Flowers: Bright yellow, five-petalled, with numerous stamens and black-dotted petal edges, in flat-topped clusters
Stem: Erect, branching, with two raised longitudinal ridges
Root: Woody rootstock with spreading rhizomes
Fruit: Small, three-valved capsule
Flowering Period: June-September (traditionally around St John's Day, 24 June)

Habitat

Native to woodland understorey and forest margins of eastern North America; widely cultivated as an ornamental and medicinal shrub.[14]

Grows in grassland, roadsides, woodland clearings and waste ground on well-drained soils; native to Europe, Western Asia and North Africa and widely naturalised elsewhere, including North America and Australia.[4]

Harvesting

Bark is stripped from branches (not the main trunk, to avoid harming the plant) and leaves are picked in summer; both are dried for use, or steam-distilled together with twigs to produce distilled witch-hazel water, the most common commercial form.[14]

Parts: Bark, leaf and distilled witch-hazel water
Season: Bark and leaf in summer

The flowering tops (flower and upper leaf) are cut in summer as the flowers open, around the traditional St John's Day period, and dried quickly in a warm, shaded, airy place to preserve the hypericin and hyperforin content.[4]

Parts: Flower, Leaf
Season: Summer, at flowering

Traditional Uses

Witch hazel has a long Native American and, after adoption by European settlers, worldwide reputation as a topical astringent and anti-inflammatory remedy for skin irritation, minor wounds, bruises, insect bites and haemorrhoids, and as a soothing wash for irritated skin and mucous membranes.[14]

St John's wort has a centuries-long European folk reputation as a wound-healing and nerve tonic herb, traditionally used for mild wounds, burns and nerve pain and to lift low mood; this traditional mood-supporting use is now one of the most extensively clinically studied applications of any herbal medicine, with standardised extracts shown comparable to conventional antidepressants for mild-to-moderate depression.[1, 4]

Preparations

Distilled witch-hazel water[14]

Steam-distilled preparation of the bark and twigs, applied topically as a soothing, astringent skin toner and wound wash; the most widely used commercial form.

Decoction (bark/leaf)[14]

Dried bark or leaf simmered in water and used as a cooled topical wash or compress.

Standardised extract[1]

Flowering-top extract standardised to hypericin and/or hyperforin content, taken as tablets or capsules; the best-studied clinical form for mood support.

Dosage

Topical preparations[14]

The EU herbal monograph on Hamamelis virginiana L., cortex gives, for cutaneous use, tincture at a strength corresponding to 5-10% in semi-solid preparations several times daily, or a dry extract (5-7.7:1, ethanol 30% m/m) at a strength corresponding to 1.3% as an ointment several times daily; for anorectal use, a decoction of 5-10 g per 250 mL up to 3 times daily as impregnated dressings. For topical use only. Educational reference only, not a prescription.

Standardised extract[1]

Clinical trials for mild-to-moderate depression commonly use around 300 mg of standardised extract three times daily (900 mg/day total); given extensive drug interactions, use should be discussed with a healthcare provider, especially alongside other medicines. Educational reference only, not a prescription.

References

REF-0830, REF-0831, REF-0832, REF-2049, REF-2050, REF-2051, REF-2052, REF-2053, REF-2054, REF-2055, REF-2056, REF-2057, REF-2058
REF-0842, REF-0843, REF-0844, REF-1789, REF-1790, REF-1791, REF-1792, REF-1793, REF-1794, REF-1795, REF-1796, REF-1797, REF-1798, REF-1799

Lookalikes Review

Outcome: none-known
Reviewed By: Omnia Sana (owner-authorized)
Reviewed Date: 2026-07-07
Outcome: none-known
Reviewed By: Omnia Sana (owner-authorized)
Reviewed Date: 2026-07-07

Drug Class Interactions

Not documented

Safety note[18, 19, 20, 21]Avoid
Drug Class: antidepressants-serotonergic
Mechanism: St John's wort raises serotonin activity; combined with SSRIs, SNRIs or MAOIs it can trigger serotonin syndrome (agitation, tremor, sweating, rapid heartbeat). Reviews of clinical reports document serotonin syndrome and lethargy when it is combined with serotonin-reuptake inhibitors.
Reviewed By: Omnia Sana (owner-authorized)
Reviewed Date: 2026-07-03
Safety note[18, 19, 22]Avoid
Drug Class: antiretrovirals
Mechanism: Potent CYP3A4 and P-glycoprotein induction lowers antiretroviral levels (indinavir exposure fell ~57%), risking loss of viral control and drug resistance.
Reviewed By: Omnia Sana (owner-authorized)
Reviewed Date: 2026-07-03
Safety note[18, 19, 23]Avoid
Drug Class: immunosuppressants
Mechanism: Enzyme and transporter induction reduces ciclosporin and tacrolimus levels; reported to cause subtherapeutic concentrations and transplant rejection.
Reviewed By: Omnia Sana (owner-authorized)
Reviewed Date: 2026-07-03
Safety note[18, 24, 25, 26]Avoid
Drug Class: hormonal-therapies
Mechanism: Increased metabolism of ethinylestradiol and progestins reduces contraceptive exposure, causing breakthrough bleeding, ovulation and unplanned pregnancy. Randomised and controlled trials in women confirmed more breakthrough bleeding, reduced progestin levels and evidence of ovulation when St John's wort was added to the pill.
Reviewed By: Omnia Sana (owner-authorized)
Reviewed Date: 2026-07-03
Safety note[18, 19, 21]Caution
Drug Class: anticoagulants-antiplatelets
Mechanism: CYP induction increases warfarin clearance and can lower INR, reducing the anticoagulant effect; close monitoring is needed.
Reviewed By: Omnia Sana (owner-authorized)
Reviewed Date: 2026-07-03
Safety note[18, 27]Caution
Drug Class: cardiac-glycosides
Mechanism: P-glycoprotein induction lowers digoxin levels (AUC fell ~25% over ten days), which may reduce its effect.
Reviewed By: Omnia Sana (owner-authorized)
Reviewed Date: 2026-07-03
Safety note[18, 19, 21]Caution
Drug Class: statins
Mechanism: CYP3A4 induction lowers levels of simvastatin and atorvastatin, potentially weakening their cholesterol-lowering effect.
Reviewed By: Omnia Sana (owner-authorized)
Reviewed Date: 2026-07-03
Safety note[18, 19, 21]Caution
Drug Class: cyp3a4-substrates
Mechanism: As a broad CYP3A4 and P-glycoprotein inducer, St John's wort can lower levels of many medicines cleared by this pathway; check each medication individually.
Reviewed By: Omnia Sana (owner-authorized)
Reviewed Date: 2026-07-03
Safety note[20, 28, 29]Avoid
Drug Class: chemotherapy-agents
Mechanism: St John's wort strongly induces CYP3A4 and P-glycoprotein, speeding the breakdown and removal of several cancer medicines. In patients it cut the active form of irinotecan (SN-38) by about 42% and reduced imatinib exposure by roughly a third - enough to weaken treatment and risk drug resistance. Do not take St John's wort during chemotherapy.
Reviewed By: Omnia Sana (owner-authorized)
Reviewed Date: 2026-07-03

Pairings

Not documented

St John's wort raises serotonin activity and can cause serotonin syndrome when combined with other serotonin-boosting agents; pairing it with another mood-active, serotonergic herb such as saffron may add to this risk.[30]

Partner Id: crocus-sativus
Type: caution
Reviewed By: Omnia Sana (owner-authorized)
Reviewed Date: 2026-07-03

St John's wort is a strong enzyme inducer and increases serotonin activity; combining it with another antidepressant-type herb such as rhodiola may add to serotonergic effects and unpredictably change how each is handled by the body.[30]

Partner Id: rhodiola-rosea
Type: caution
Reviewed By: Omnia Sana (owner-authorized)
Reviewed Date: 2026-07-03

St John's wort speeds up the breakdown of many substances and also raises serotonin activity; pairing it with a sedative herb such as valerian may add to drowsiness and can unpredictably change how each is handled by the body.[30, 31]

Partner Id: valeriana-officinalis
Type: caution
Reviewed By: Omnia Sana (owner-authorized)
Reviewed Date: 2026-07-03

St John's wort is a strong enzyme inducer and kava is a liver-metabolised sedative; combining them may add to central-nervous-system effects and alter how kava is processed, so combined use warrants caution.[30, 31]

Partner Id: piper-methysticum
Type: caution
Reviewed By: Omnia Sana (owner-authorized)
Reviewed Date: 2026-07-03

References & Sources

  1. Skowrońska, W., Pawłowska, K.A., Obrębski, M., Piwowarski, J.P. et al (2025) 'Chemical composition, skin microbiota metabolism, antimicrobial potential and anti-inflammatory properties of witch hazel bark (Hamamelis virginiana L.)', Journal of Ethnopharmacology, 353(Pt B), pp. 120433. doi:10.1016/j.jep.2025.120433 Preclinical
    https://doi.org/10.1016/j.jep.2025.120433
  2. Piazza, S., Martinelli, G., Vrhovsek, U., Masuero, D. et al (2022) 'Anti-Inflammatory and Anti-Acne Effects of Hamamelis virginiana Bark in Human Keratinocytes', Antioxidants (Basel), 11(6), pp. 1119. doi:10.3390/antiox11061119 Preclinical
    https://doi.org/10.3390/antiox11061119
  3. Janarthanam, V.A., Rajan, P.S.S., Panda, S.P., Panigrahy, U.P. et al (2025) 'Hamamelitannin from Hamamelis virginiana Attenuates Ethanol-Induced Oxidative and Inflammatory Responses in Danio rerio Larvae', Molecular Biotechnology, 68(5), pp. 2369-2385. doi:10.1007/s12033-025-01502-9 Preclinical
    https://doi.org/10.1007/s12033-025-01502-9
  4. Piazza, S., Martinelli, G., Magnavacca, A., Fumagalli, M., Pozzoli, C., Terno, M., Canilli, L., Angarano, M., Maranta, N., Dell'Agli, M. and Sangiovanni, E (2022) 'Unveiling the Ability of Witch Hazel (Hamamelis virginiana L.) Bark Extract to Impair Keratinocyte Inflammatory Cascade Typical of Atopic Eczema', International Journal of Molecular Sciences, 23(16), pp. 9279. doi:10.3390/ijms23169279 Preclinical
    https://doi.org/10.3390/ijms23169279
  5. Amendola, I., Viegas, D.J., Freitas, E.T., Oliveira, J.R., Santos, J.G., Oliveira, F.E., Lagareiro Netto, A.A., Marcucci, M.C., Oliveira, L.D. and Back-Brito, G.N (2024) 'Hamamelis virginiana L. extract presents antimicrobial and antibiofilm effects, absence of cytotoxicity, anti-inflammatory action, and potential to fight infections through the nitric oxide production by macrophages', Anais da Academia Brasileira de Ciencias, 96(1), pp. e20200031. doi:10.1590/0001-3765202320200031 Preclinical
    https://doi.org/10.1590/0001-3765202320200031
  6. Habtemariam, S (2002) 'Hamamelitannin from Hamamelis virginiana inhibits the tumour necrosis factor-alpha (TNF)-induced endothelial cell death in vitro', Toxicon, 40(1), pp. 83-88. doi:10.1016/s0041-0101(01)00195-7 Preclinical
    https://doi.org/10.1016/s0041-0101(01)00195-7
  7. Natella, F., Guantario, B., Ambra, R., Ranaldi, G., Intorre, F., Burki, C. and Canali, R (2021) 'Human Metabolites of Hamamelis virginiana (Extract) Modulate Fibroblast Extracellular Matrix Components in Response to UV-A Irradiation', Frontiers in Pharmacology, 12, pp. 747638. doi:10.3389/fphar.2021.747638 Randomized trial
    https://doi.org/10.3389/fphar.2021.747638
  8. Dauer, A., Rimpler, H. and Hensel, A (2003) 'Polymeric proanthocyanidins from the bark of Hamamelis virginiana', Planta Medica, 69(1), pp. 89-91. doi:10.1055/s-2003-37022 Preclinical
    https://doi.org/10.1055/s-2003-37022
  9. Vennat, B., Pourrat, H., Pouget, M.P., Gross, D. and Pourrat, A (1988) 'Tannins from Hamamelis virginiana: identification of proanthocyanidins and hamamelitannin quantification in leaf, bark, and stem extracts', Planta Medica, 54(5), pp. 454-457. doi:10.1055/s-2006-962499 Preclinical
    https://doi.org/10.1055/s-2006-962499
  10. Duckstein, S.M., Lorenz, P. and Stintzing, F.C (2012) 'Conversion of phenolic constituents in aqueous Hamamelis virginiana leaf extracts during fermentation', Phytochemical Analysis, 23(6), pp. 588-597. doi:10.1002/pca.2359 Preclinical
    https://doi.org/10.1002/pca.2359
  11. Sanchez-Tena, S., Fernandez-Cachon, M.L., Carreras, A., Mateos-Martin, M.L., Costoya, N., Moyer, M.P., Nunez, M.J., Torres, J.L. and Cascante, M (2012) 'Hamamelitannin from witch hazel (Hamamelis virginiana) displays specific cytotoxic activity against colon cancer cells', Journal of Natural Products, 75(1), pp. 26-33. doi:10.1021/np200426k Preclinical
    https://doi.org/10.1021/np200426k
  12. Theisen, L.L., Erdelmeier, C.A.J., Spoden, G.A., Boukhallouk, F., Sausy, A., Florin, L. and Muller, C.P (2014) 'Tannins from Hamamelis virginiana bark extract: characterization and improvement of the antiviral efficacy against influenza A virus and human papillomavirus', PLoS One, 9(1), pp. e88062. doi:10.1371/journal.pone.0088062 Preclinical
    https://doi.org/10.1371/journal.pone.0088062
  13. Cheesman, M.J., Alcorn, S.R., White, A. and Cock, I.E (2023) 'Hamamelis virginiana L. Leaf Extracts Inhibit the Growth of Antibiotic-Resistant Gram-Positive and Gram-Negative Bacteria', Antibiotics, 12(7), pp. 1195. doi:10.3390/antibiotics12071195 Preclinical
    https://doi.org/10.3390/antibiotics12071195
  14. European Medicines Agency (HMPC) (n.d.) 'European Union herbal monograph on Hamamelis virginiana L., cortex/folium/aqua (Hamamelidis cortex)'. Available at: https://www.ema.europa.eu/en/medicines/herbal/hamamelidis-cortex Traditional / reference
    https://www.ema.europa.eu/en/medicines/herbal/hamamelidis-cortex
  15. (2025) 'Hamamelis virginiana L. in Skin Care: A Review of Its Pharmacological Properties and Cosmetological Applications', Molecules. doi:10.3390/molecules30132744 Randomized trial
    https://doi.org/10.3390/molecules30132744
  16. Herbal Reality (n.d.) 'Witch Hazel (Hamamelis virginiana): Benefits, Safety, Uses'. Available at: https://www.herbalreality.com/herb/witch-hazel/ Traditional / reference
    https://www.herbalreality.com/herb/witch-hazel/
  1. Ng, Q.X., Venkatanarayanan, N. and Ho, C.Y.X (2017) 'Clinical use of Hypericum perforatum (St John's wort) in depression: A meta-analysis', Journal of Affective Disorders, 210, pp. 211-221. doi:10.1016/j.jad.2016.12.048 Meta-analysis / review
    https://doi.org/10.1016/j.jad.2016.12.048
  2. Kholghi, G., Arjmandi-Rad, S., Zarrindast, M.R. and Vaseghi, S (2022) 'St. John's wort (Hypericum perforatum) and depression: what happens to the neurotransmitter systems?', Naunyn-Schmiedeberg's Archives of Pharmacology, 395(6), pp. 629-642. doi:10.1007/s00210-022-02229-z Traditional / reference
    https://doi.org/10.1007/s00210-022-02229-z
  3. Fugh-Berman, A (2000) 'Herb-drug interactions', Lancet, 355(9198), pp. 134-138. doi:10.1016/S0140-6736(99)06457-0 Traditional / reference
    https://doi.org/10.1016/S0140-6736(99)06457-0
  4. Nobakht, S.Z., Akaberi, M., Mohammadpour, A.H., Tafazoli Moghadam, A. and Emami, S.A (2022) 'Hypericum perforatum: Traditional uses, clinical trials, and drug interactions', Iranian Journal of Basic Medical Sciences, 25(9), pp. 1045-1058. doi:10.22038/IJBMS.2022.65112.14338 Meta-analysis / review
    https://doi.org/10.22038/IJBMS.2022.65112.14338
  5. Jiang, Z., Wang, F., Zhao, Y., Lu, L., Jiang, X., Huang, T., Lin, Y., Guo, L., Weng, Z. and Liu, E (2024) 'Hypericum perforatum L. attenuates depression by regulating Akkermansia muciniphila, tryptophan metabolism and NFkB-NLRP2-Caspase1-IL1beta pathway', Phytomedicine, 132, pp. 155847. doi:10.1016/j.phymed.2024.155847 Preclinical
    https://doi.org/10.1016/j.phymed.2024.155847
  6. Oliveira, A.I., Pinho, C., Sarmento, B. and Dias, A.C.P (2016) 'Neuroprotective Activity of Hypericum perforatum and Its Major Components', Frontiers in Plant Science, 7, pp. 1004. doi:10.3389/fpls.2016.01004 Meta-analysis / review
    https://doi.org/10.3389/fpls.2016.01004
  7. Russo, E., Scicchitano, F., Whalley, B.J., Mazzitello, C., Ciriaco, M., Esposito, S., Patane, M., Upton, R., Pugliese, M., Chimirri, S., Mammi, M., Palleria, C. and De Sarro, G (2013) 'Hypericum perforatum: pharmacokinetic, mechanism of action, tolerability, and clinical drug-drug interactions', Phytotherapy Research, 28(5), pp. 643-655. doi:10.1002/ptr.5050 Meta-analysis / review
    https://doi.org/10.1002/ptr.5050
  8. Saddiqe, Z., Naeem, I. and Maimoona, A (2010) 'A review of the antibacterial activity of Hypericum perforatum L', Journal of Ethnopharmacology, 131(3), pp. 511-521. doi:10.1016/j.jep.2010.07.034 Meta-analysis / review
    https://doi.org/10.1016/j.jep.2010.07.034
  9. Mennini, T. and Gobbi, M (2004) 'The antidepressant mechanism of Hypericum perforatum', Life Sciences, 75(9), pp. 1021-1027. doi:10.1016/j.lfs.2004.04.005 Meta-analysis / review
    https://doi.org/10.1016/j.lfs.2004.04.005
  10. Liu, Y., Jiang, Y., Huang, R., Yang, J., Xiao, B. and Dong, J (2013) 'Hypericum perforatum L. preparations for menopause: a meta-analysis of efficacy and safety', Climacteric, 17(4), pp. 325-335. doi:10.3109/13697137.2013.861814 Meta-analysis / review
    https://doi.org/10.3109/13697137.2013.861814
  11. Wurglics, M. and Schubert-Zsilavecz, M (2006) 'Hypericum perforatum: a 'modern' herbal antidepressant: pharmacokinetics of active ingredients', Clinical Pharmacokinetics, 45(5), pp. 449-468. doi:10.2165/00003088-200645050-00002 Meta-analysis / review
    https://doi.org/10.2165/00003088-200645050-00002
  12. Kasper, S (2001) 'Hypericum perforatum - a review of clinical studies', Pharmacopsychiatry, 34(Suppl 1), pp. S51-S55. doi:10.1055/s-2001-15467 Meta-analysis / review
    https://doi.org/10.1055/s-2001-15467
  13. Nathan, P (1999) 'The experimental and clinical pharmacology of St John's Wort (Hypericum perforatum L.)', Molecular Psychiatry, 4(4), pp. 333-338. doi:10.1038/sj.mp.4000557 Meta-analysis / review
    https://doi.org/10.1038/sj.mp.4000557
  14. Verotta, L (2003) 'Hypericum perforatum, a source of neuroactive lead structures', Current Topics in Medicinal Chemistry, 3(2), pp. 187-201. doi:10.2174/1568026033392589 Meta-analysis / review
    https://doi.org/10.2174/1568026033392589
  15. Linde, K. et al (2008) 'St John'. Traditional / reference
    https://scholar.google.com/scholar?q=St%20John
  16. Natural Standard (2013) 'Hypericum perforatum (St'. Traditional / reference
    https://scholar.google.com/scholar?q=Hypericum%20perforatum%20%28St
  17. Duke, J.A (2002) 'Handbook of Medicinal Herbs, Second Edition'. Traditional / reference
    https://scholar.google.com/scholar?q=Handbook%20of%20Medicinal%20Herbs%2C%20Second%20Edition
  18. Zhou, S., Chan, E., Pan, S.Q., Huang, M. and Lee, E.J.D (2004) 'Pharmacokinetic interactions of drugs with St John's wort', Journal of Psychopharmacology, 18(2), pp. 262-276. doi:10.1177/0269881104042632 Meta-analysis / review
    https://doi.org/10.1177/0269881104042632
  19. Izzo, A.A. and Ernst, E (2009) 'Interactions between herbal medicines and prescribed drugs: an updated systematic review', Drugs, 69(13), pp. 1777-1798. doi:10.2165/11317010-000000000-00000 Meta-analysis / review
    https://doi.org/10.2165/11317010-000000000-00000
  20. Borrelli, F. and Izzo, A.A (2009) 'Herb-drug interactions with St John's wort (Hypericum perforatum): an update on clinical observations', The AAPS Journal, 11(4), pp. 710-727. doi:10.1208/s12248-009-9146-8 Meta-analysis / review
    https://doi.org/10.1208/s12248-009-9146-8
  21. Nicolussi, S., Drewe, J., Butterweck, V. and Meyer zu Schwabedissen, H.E (2020) 'Clinical relevance of St. John's wort drug interactions revisited', British Journal of Pharmacology, 177(6), pp. 1212-1226. doi:10.1111/bph.14936 Meta-analysis / review
    https://doi.org/10.1111/bph.14936
  22. Piscitelli, S.C., Burstein, A.H., Chaitt, D., Alfaro, R.M. and Falloon, J (2000) 'Indinavir concentrations and St John's wort', Lancet, 355(9203), pp. 547-548. doi:10.1016/S0140-6736(99)05712-8 Clinical study
    https://doi.org/10.1016/S0140-6736(99)05712-8
  23. Barone, G.W., Gurley, B.J., Ketel, B.L., Lightfoot, M.L. and Abul-Ezz, S.R (2000) 'Drug interaction between St. John's wort and cyclosporine', Annals of Pharmacotherapy, 34(9), pp. 1013-1016. doi:10.1345/aph.10088 Clinical study
    https://doi.org/10.1345/aph.10088
  24. Murphy, P.A., Kern, S.E., Stanczyk, F.Z. and Westhoff, C.L (2005) 'Interaction of St. John's Wort with oral contraceptives: effects on the pharmacokinetics of norethindrone and ethinyl estradiol, ovarian activity and breakthrough bleeding', Contraception, 71(6), pp. 402-408. doi:10.1016/j.contraception.2004.11.004 Clinical study
    https://doi.org/10.1016/j.contraception.2004.11.004
  25. Murphy, P.A., Kern, S.E., Stanczyk, F.Z. and Westhoff, C.L (2005) 'Interaction of St. John's Wort with oral contraceptives: effects on the pharmacokinetics of norethindrone and ethinyl estradiol, ovarian activity and breakthrough bleeding', Contraception, 71(6), pp. 402-408. doi:10.1016/j.contraception.2004.11.004 Clinical study
    https://doi.org/10.1016/j.contraception.2004.11.004
  26. Pfrunder, A., Schiesser, M., Gerber, S., Haschke, M., Bitzer, J. and Drewe, J (2003) 'Interaction of St John's wort with low-dose oral contraceptive therapy: a randomized controlled trial', British Journal of Clinical Pharmacology, 56(6), pp. 683-690. doi:10.1046/j.1365-2125.2003.02005.x Randomized trial
    https://doi.org/10.1046/j.1365-2125.2003.02005.x
  27. Johne, A., Brockmoller, J., Bauer, S., Maurer, A., Langheinrich, M. and Roots, I (1999) 'Pharmacokinetic interaction of digoxin with an herbal extract from St John's wort (Hypericum perforatum)', Clinical Pharmacology and Therapeutics, 66(4), pp. 338-345. doi:10.1053/cp.1999.v66.a101944 Clinical study
    https://doi.org/10.1053/cp.1999.v66.a101944
  28. Mathijssen, R.H.J., Verweij, J., de Bruijn, P., Loos, W.J. and Sparreboom, A (2002) 'Effects of St. John's wort on irinotecan metabolism', Journal of the National Cancer Institute, 94(16), pp. 1247-1249. doi:10.1093/jnci/94.16.1247 Randomized trial
    https://doi.org/10.1093/jnci/94.16.1247
  29. Smith, P., Bullock, J.M., Booker, B.M., Haas, C.E., Berenson, C.S. and Jusko, W.J (2004) 'The influence of St. John's wort on the pharmacokinetics and protein binding of imatinib mesylate', Pharmacotherapy, 24(11), pp. 1508-1514. doi:10.1592/phco.24.16.1508.50958 Clinical study
    https://doi.org/10.1592/phco.24.16.1508.50958
  30. Izzo, A.A (2004) 'Drug interactions with St. John's Wort (Hypericum perforatum): a review of the clinical evidence', International Journal of Clinical Pharmacology and Therapeutics, 42(3), pp. 139-148. doi:10.5414/cpp42139 Meta-analysis / review
    https://doi.org/10.5414/cpp42139
  31. Caus, M.N., Lupoae, M. and Chitescu, C.L (2026) 'Efficacy and Safety of Herbal Supplements with Anxiolytic, Antidepressant, and Sedative Action: A Review of Clinical Data and Toxicological Risks', Pharmaceuticals, 19(3), pp. 399. doi:10.3390/ph19030399 Meta-analysis / review
    https://doi.org/10.3390/ph19030399

Generated automatically from the Omnia Sana plant database and its cited sources. For educational purposes only — not medical advice. Always consult a qualified practitioner before using medicinal plants.