St. John's Wort (Hypericum perforatum) (cont.)

SIDE EFFECTS: The most common side effects associated with St. John's wort treatment are upset stomach, dizziness, confusion, tiredness, sleepiness, sensitivity to light, dry mouth, urinary frequency, swelling, and sexual dysfunction.

REFERENCE: "Herbal Medicine: Biomolecular and Clinical Aspects. 2nd edition." Benzie IFF, Wachtel-Galor S, editors. Boca Raton (FL): CRC Press; 2011.


Medically Reviewed by a Doctor on 10/24/2014


Report Problems to the Food and Drug Administration

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

Pill Finder Tool

Need help identifying pills and medications?
Use the pill identifier tool on RxList.


Back to Medications Index