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St. John's wort (Hypericum perforatum) is a plant with yellow flowers that people in European countries have used for centuries to treat mild to moderate depression. In the United States, it is sold as a dietary supplement and can be found at health food stores and pharmacies.
St. John's wort is used in the short-term treatment of mild to moderate depression.
It may take up to 2 to 3 weeks for St. John's wort to improve depressive symptoms. Not all preparations of St. John's wort are the same. A standardized form means the amount of St. John's wort is the same in every capsule.
St. John's wort causes fewer side effects (such as digestive discomfort or headaches) than antidepressant medicines, although it may cause a rash with sun exposure.
St. John's wort may interact with medicines used to treat some other illnesses, such as AIDS. It is important to let your doctor or pharmacist know if you want to try St. John's wort so that he or she can determine whether it might interfere with other medicines you are taking.
The U.S. Food and Drug Administration (FDA) does not regulate dietary supplements in the same way it regulates medicines. A dietary supplement can be sold with limited or no research on how well it works.
Always tell your doctor if you are using a dietary supplement or if you are thinking about combining a dietary supplement with your conventional medical treatment. It may not be safe to forgo your conventional medical treatment and rely only on a dietary supplement. This is especially important for women who are pregnant or breastfeeding.
When using dietary supplements, keep in mind the following:
Current as of:
March 17, 2021
Author: Healthwise StaffMedical Review: Adam Husney MD - Family Medicine
Current as of: March 17, 2021
Adam Husney MD - Family Medicine
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