Safety and side effects

When taken orally for up to 12 weeks in appropriate doses, St. John's wort is generally considered safe. However, it may cause:

• Agitation and anxiety
• Dizziness
• Diarrhea, constipation and stomach discomfort
• Dry mouth

Other side effects may include:

• Fatigue and insomnia
• Headache
• Increased sensitivity to sunlight (photosensitivity)

There isn't enough information about the safety of using St. John's wort topically.

Don't use St. John's wort during pregnancy or while breastfeeding.