A. Vogel Hypericum St Johns Wort is a fresh herb tincture of St John's Wort. It is indicated for mild depression, Seasonal Affective Disorder, shingles, cold sores & sciatica. Hypericum works as an antidepressant, an antiviral, a pain reliever & is antimicrobial. Many believe that depression is caused by chemical changes in the brain. Studies have shown that St John's Wort can help to alleviate the associated symptoms of depression, including low energy, lack of interest in other's activities, low mood, tiredness, lack of appetite, & restless sleep patterns. SAD is a depressive state caused by the lack of sunlight. Bioforce Hypericum has also been used to reduce viral infections such as herpes simplex (cold sores) & general nerve pain. If you are prescribed medicine or you buy medicine from a pharmacy, you must mention that you are taking St John's Wort as it may affect the medication. (For an alternative to St. John's Wort that does not affect medication you can try Lamberts Rhodiola Rosea.)