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St. John’s Wort: A Therapeutic Herb to Be Cautioned for Its Potential Neurotoxic Effects and Major Drug Interactions

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Medicinal Herbs and Fungi

Abstract

Hypericum perforatum, generally recognized as St. John’s Wort (SJW), has been used as an alternative form of medicine for centuries in various traditions and cultures all over the world. Traditional uses for this herb include broad wound healing, gastrointestinal issues and pathologies, pain, and bronchitis, among other ailments. However, it has garnered the most attention today as a treatment for mental disorders, namely depression and bipolar disorder. Supplements of SJW are easily and widely accessible due to their commercial popularity. Though a multitude of therapeutic benefits has been reported, the efficacy of SJW remains to be documented clinically. Many studies have found it to have substantial adverse and toxic effects, and at times, potentially fatal drug interactions. The current chapter provides a brief history of H. perforatum, a summary of its active constituents, current and potential therapeutic uses, adverse drug effects, and drug interactions that should be taken into consideration when prophylactically and/or therapeutically using SJW with prescribed medications.

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Abbreviations

AAPH:

2,2′-Azobis(2-amidinopropane) dihydrochloride

AD:

Alzheimer’s disease

AIDS:

Acquired immunodeficiency syndrome

AUC:

Area under the curve

Aβ:

Amyloid-β

CDC:

Centers for Disease Control and Prevention

CYP2C9:

Cytochrome P450 Family 2 Subfamily C Member 9

CYP2E1:

Cytochrome P450 Family 2 Subfamily E Member 1

CYP3A4:

Cytochrome P450 3A4

DPPH:

1,1-Diphenyl-2-picrylhydrazyl

GABA:

Gamma-aminobutyric acid

HIV:

Human immunodeficiency virus

LC–MS:

Liquid chromatography–mass spectrometry

LDL:

Low-density lipoprotein

l-DOPA:

l-3,4-Dihydroxyphenylalanine

MAO:

Monoamine oxidase

MDR1:

Multidrug-resistant gene

MPA:

Medical products agency

NSAIDs:

Nonsteroidal anti-inflammatory drugs

PD:

Parkinson’s disease

PMA:

Phorbol 12-myristate 13-acetate

SJW:

St. John’s Wort

SN:

Substantia nigra

SSRI:

Selective serotonin reuptake inhibitor

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Correspondence to Dinesh Chandra Agrawal or Muralikrishnan Dhanasekaran .

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© 2021 The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

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Fujihashi, A. et al. (2021). St. John’s Wort: A Therapeutic Herb to Be Cautioned for Its Potential Neurotoxic Effects and Major Drug Interactions. In: Agrawal, D.C., Dhanasekaran, M. (eds) Medicinal Herbs and Fungi. Springer, Singapore. https://doi.org/10.1007/978-981-33-4141-8_15

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