Second-Generation Antidepressants Are Stronger Than St. John's Wort for Treating Depression
For treating depression, second-generation antidepressants (SGAs) and cognitive behavioral therapy (CBT) are more effective and reliable options than St. John's wort, particularly for moderate to severe depression. 1
Comparative Effectiveness of Treatment Options
St. John's Wort vs. SGAs
- Low-quality evidence shows St. John's wort may be as effective as SGAs for treating mild to moderate depression 1
- Moderate-quality evidence indicates St. John's wort is better tolerated with fewer side effects than SGAs 1
- Recent meta-analyses support comparable efficacy between St. John's wort and SSRIs for mild to moderate depression 2, 3
- However, evidence for St. John's wort in severe depression is insufficient 3
Stronger Options for Depression
Second-Generation Antidepressants (SGAs)
Cognitive Behavioral Therapy (CBT)
Limitations of St. John's Wort
Regulatory and Standardization Issues
- Not regulated by the FDA in the United States 1
- No standard in place regarding contents and potency 1
- Patients may not reliably obtain preparations with similar effectiveness as those used in clinical studies 1
- Quality control issues make dosing unpredictable
Safety Concerns
- Important drug-drug interactions due to induction of cytochrome P450 isoenzyme 3A4 1
- May reduce bioavailability/efficacy of oral contraceptives and immunosuppressants 1
- Contraindicated with monoamine oxidase inhibitors and serotonin reuptake inhibitors 1
- Risk of serotonin syndrome when combined with other serotonergic medications 4
Inconsistent Evidence
- Some studies show no benefit over placebo for minor depression 5
- Limited evidence for long-term efficacy and safety (most studies only 4-12 weeks) 3
- Efficacy data primarily for mild to moderate depression, not severe depression 3, 4
Clinical Decision Algorithm
Assess depression severity:
- For mild to moderate depression: Consider SGAs, CBT, or St. John's wort
- For moderate to severe depression: Use SGAs or CBT (not St. John's wort)
Consider patient factors:
- Medication interactions: Avoid St. John's wort if on other medications
- Need for standardized dosing: Choose SGAs for reliable dosing
- Side effect concerns: Discuss specific SGA side effect profiles
- Bupropion: Lower sexual side effects than fluoxetine/sertraline
- Paroxetine: Higher sexual dysfunction rates than other SGAs 1
Treatment approach:
- First-line: SGAs or CBT based on availability and patient preference
- Second-line: If initial treatment fails, consider switching to another SGA or augmentation strategies
- St. John's wort: Only consider for mild depression in patients without medication interactions and with access to quality-controlled preparations
Important Caveats
- St. John's wort preparations vary widely in quality and potency in the US market
- Always check for drug interactions before recommending St. John's wort
- Monitor patients closely when starting any antidepressant treatment
- For most patients with clinically significant depression, evidence-based treatments like SGAs or CBT offer more reliable and potentially stronger therapeutic effects