St. John's Wort, an anti-depressant? A systematic, criteria-based review

E Ernst1

  • 1Centre for Complementary Health Studies and Postgraduate Medical School, University of Exeter, 25 Victoria Park Road, Exeter (UK) EX 2 4 NT.

Insights

Hypericum (St. John's Wort) effectively treats depression symptoms compared to placebo. This herbal remedy is safe and as effective as standard antidepressants, with fewer side effects.

Area of Science:

  • Pharmacology
  • Psychiatry
  • Evidence-based Medicine

Background:

  • Depression is a widespread mood disorder.
  • There is a need for effective and safe antidepressant treatments.
  • Hypericum perforatum (St. John's Wort) is a commonly used herbal remedy for depression.

Purpose of the Study:

  • To systematically review controlled clinical trials on Hypericum for depression.
  • To assess the efficacy and safety of Hypericum compared to placebo and standard antidepressants.

Main Methods:

  • Systematic literature search (computer and hand) for controlled clinical trials.
  • Inclusion of studies meeting predefined methodological criteria.
  • Analysis of data using the Hamilton Depression Rating Scale.

Main Results:

  • Hypericum demonstrated superiority over placebo in reducing depression symptoms.
  • Hypericum showed comparable efficacy to standard antidepressant medications.
  • Hypericum exhibited a lower frequency of adverse drug reactions compared to synthetic antidepressants.

Conclusions:

  • Hypericum is a safe and effective option for symptomatic treatment of various depression forms.
  • The herbal remedy offers a favorable safety profile over conventional antidepressants.
  • Evidence supports the use of Hypericum in managing depressive symptoms.

Related Concept Videos

Antidepressant Drugs: Overview01:25

Antidepressant Drugs: Overview

Antidepressant drugs are a class of medications primarily used for treating various mood disorders, including major depression, anxiety disorders, and other related conditions. These medicines work by modulating the neurotransmitter balance within the brain, alleviating depressive symptoms. Antidepressants can be broadly categorized into several groups according to their mechanism of action and chemical structure: Selective Serotonin Reuptake Inhibitors (SSRIs), Serotonin-Norepinephrine...
Antidepressant Drugs: MAOIs and Other Agents01:23

Antidepressant Drugs: MAOIs and Other Agents

Atypical antidepressants, including bupropion (Wellbutrin), mirtazapine (Remeron), nefazodone (Serzone), trazodone (Desyrel), and vilazodone (Viibryd), offer unique mechanisms of action. Bupropion weakly inhibits dopamine and norepinephrine reuptake, aiding depression treatment and smoking cessation, with a low risk of sexual dysfunction. Mirtazapine enhances serotonin and norepinephrine neurotransmission, leading to sedation, increased appetite, and weight gain. As a result, it helps treat...
Antidepressant Drugs: Tricyclics, SSRIs, and SNRIs01:28

Antidepressant Drugs: Tricyclics, SSRIs, and SNRIs

Tricyclic Antidepressants (TCAs), including Desipramine (Norpramin), Imipramine (Tofranil), Clomipramine (Anafranil), and Amitriptyline (Elavil), inhibit serotonin and norepinephrine reuptake and also block other receptors. They are used for depression, pain conditions, and insomnia. Common adverse effects include anticholinergic effects, sedation, orthostatic hypotension, and weight gain. They have a narrow therapeutic window and so require plasma-level monitoring. Abrupt discontinuation can...
Depression: Overview01:18

Depression: Overview

Depression is a prevalent mental illness marked by persistent sadness and lack of interest in previously enjoyable activities. It can take several forms, including major depression, persistent depressive disorder, and bipolar I and II disorders. Symptoms range from emotional changes like chronic worry to physical changes like sleep disturbances and suicidal thoughts. From a neurobiological perspective, depression is believed to be triggered by abnormalities in the brain's prefrontal cortex,...
Long-term Depression01:05

Long-term Depression

Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
Anxiolytic Drugs: Overview01:26

Anxiolytic Drugs: Overview

Anxiolytic drugs are vital in managing anxiety disorders by effectively alleviating symptoms such as excessive fear, tachycardia, and tremors. There are several classes of anxiolytic medications, each with unique mechanisms of action and potential side effects.
Primary Types of Anxiolytic Drugs
1. Benzodiazepines:
Benzodiazepines bind to the GABA-A receptor in the brain, enhancing GABA's interaction. This action reduces neurotransmission, effectively blocking anxiety-associated limbic circuitry.