St. John's Wort (Hypericum perforatum)is anherbal supplementcommonly used formild to moderate depression.
* Containshypericin and hyperforin, which may increaseserotonin, dopamine, and norepinephrine levels.
* Often used as analternative treatment for depression, but not FDA-approved for this indication.
* Hasserious drug interactions, including withantidepressants (SSRIs, SNRIs), warfarin, oral contraceptives, and cyclosporine.
* (A) Immune enhancer#Incorrect - Not primarily used to boost the immune system.
* (B) Mild antidepressant#Correct - Used for mild depression.
* (C) Antioxidant#Incorrect - While it has some antioxidant properties, this is not its primary use.
* (D) Antihypertensive#Incorrect - It does not lower blood pressure.
* National Center for Complementary and Integrative Health (NCCIH) - St. John's Wort:
https://www.nccih.nih.gov/
* MedlinePlus - St. John's Wort Drug Interactions:https://medlineplus.gov
* PTCB Exam Content Outline - Herbal Supplements & Drug Interactions
How St. John's Wort Works:Analysis of Answer Choices:References for Pharmacy Technicians: