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St. John' s
wort has been studied extensively as a treatment for depression. Most studies
show that St. John's wort may help treat mild-to-moderate depression, and has
fewer side effects than most other prescription antidepressants.
Treating Mild Depression
There is scientific
evidence that St. John's wort is useful for milder forms of depression. Before
taking St. John’s wort, you need to consult your doctor, especially if you are
taking any type of prescription medication -- St. John's wort interacts with
certain drugs, and these interactions can limit the effectiveness of some
prescription medicines. Always let your health care
How Does St. John’s Wort Work?
St. John's wort (Hypericum perforatum) contains
many chemical compounds. Some are believed to be the active ingredients that
produce the herb's effects, including the compounds hypericin and hyperforin. Preliminary
studies suggest that St. John's wort might work by preventing nerve cells in
the brain from reabsorbing the chemical messenger serotonin, or by reducing
levels of a protein involved in the body's immune system functioning (much like
SSRIs).St. John's wort has been used over the centuries for mental conditions, nerve pain, and a wide variety of other health conditions. Today, St. John's wort is used for anxiety, mild to moderate depression, and sleep disorders. (These three things are what I take St. John’s Wort for: anxiety, low mood, and sleep problems).
In the
United States, St. John's wort products are sold as:
· Capsules and tablets
· Teas—the dried herb is added to
boiling water and steeped
· Liquid extracts—specific types of
chemicals are removed from the herb, leaving the desired chemicals in a
concentrated form.
About Depression
Depression is a medical condition that affects
nearly 21 million American adults each year. Mood, thoughts, physical health,
and behavior all may be affected.
Symptoms of
depression commonly include:
· Persistent sad, anxious, or
"empty" feelings
· Feelings of hopelessness and/or
pessimism
· Feelings of guilt, worthlessness,
and/or helplessness
· Restlessness or irritability
· Loss of interest or pleasure in
activities that the person once enjoyed
· Fatigue and decreased energy
· Difficulty concentrating,
remembering details, and/or making decisions Insomnia, early–morning
wakefulness, or excessive sleeping
· Overeating, or appetite loss
· Thoughts of suicide, suicide
attempts
· Persistent aches or pains,
headaches, cramps, or digestive problems that do not ease with treatment.
Depression
comes in several forms and its symptoms and severity can vary from person to
person. For example:
Dysthymia
(also called
dysthymic disorder), a less severe, but more chronic form of depression, people
experience symptoms that are not as disabling but keep them from functioning
well or feeling good. Symptoms last at least 2 years. Many people with
dysthymia also have episodes of major depression. In bipolar disorder (also
called manic–depressive illness), people have periods of depressive symptoms
that alternate or may co-exist with periods of mania. Symptoms of mania include
abnormally high levels of excitement and energy, racing thoughts, and behavior
that is impulsive and inappropriate.
Minor Depression
In addition,
milder forms of depression exist that fall into the category of minor
depression. In minor depression, people experience the same symptoms as major
depression, but they are fewer in number and are less disabling. Symptoms last
at least 6 months but less than 2 years continuously.
What the Science Says About St.
John's Wort for Depression
St. John's
wort may have only minimal beneficial effects on major depression. However, the
analysis also found that St. John's wort may benefit people with minor depression; these
benefits may be similar to those from standard antidepressants.
Overall, St. John's wort appeared to produce fewer side effects than some
standard antidepressants.
Side Effects and Risks
The most common side effects of St. John's
wort include dry mouth, dizziness, diarrhea, nausea, increased sensitivity to
sunlight, and fatigue. Taking St. John's wort can limit the effectiveness of
some prescription medicines, including: Antidepressant medicines; Birth control
pills; Cyclosporine, a medicine that helps prevent the body from rejecting
transplanted organs; Digoxin, a medicine used to strengthen heart muscle
contractions; Indinavir and other medicines used to control HIV infection; Irinotecan
and other anticancer medicines; Warfarin and related medicines used to thin the
blood (known as anticoagulants). When combined with certain antidepressants,
St. John's wort also may increase side effects such as nausea, anxiety,
headache, and confusion.
Herbal Products: Issues To
Consider
Herbal products such as St. John's wort are
classified as dietary supplements by the U.S. Food and Drug Administration
(FDA). The strength and quality of herbal products are often unpredictable.
Products can differ in content not only from brand to brand, but from batch to
batch. Information on labels may be misleading or inaccurate.
How to Take It
You should not take St. John’s
Wort without consulting your doctor. Please consultthis website for more information.
· Dry herb (in capsules or
tablets):
The usual dose for mild depression and mood disorders is 300 mg
(standardized to 0.3% hypericin extract), 3 times per day, with meals. St.
John's wort is available in time-release capsules.
· Liquid
St. John' s Wort is also available as a liquid extract or a tea.
Ask your doctor to help you find the right dose.
It may take
3 - 4 weeks to feel any effects from St. John's wort.
Don' t stop taking St. John' s wort all at once, because that may cause unpleasant side effects. Gradually lower the dose before stopping.
Again, you
should see a doctor to make sure you have the right diagnosis before taking St.
John's wort. Your doctor can help you determine the right dose and make sure
you are not taking any other medications that might interact with St. John's
wort.
Side effects
from St. John's wort are generally mild and include stomach upset, hives or
other skin rashes, fatigue, restlessness, headache, dry mouth, and feelings of
dizziness or mental confusion. St. John's wort can also make the skin overly
sensitive to sunlight, called photodermatitis. If you have light skin and are
taking St. John's wort, wear long sleeves and a hat when in the sun, and use a sunscreen
with at least SPF 15 or higher. Avoid sunlamps, tanning booths, and tanning
beds.
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