St. Johns Wort May Not Stop Major Depression

Mixed Results

Overall, in adults with mild to moderate depression, St. John's wort improved depression symptoms more than placebo and had similar benefits to standard antidepressants, write the researchers.

However, when they looked at six large, recent, more precise trials that only included people with major depression, the researchers say they found "only minimal benefits" compared with placebo.

They also say the studies showed fewer adverse effects with St. John's wort than with older antidepressants such as the tricyclic drugs. St. John's wort may also have had slightly fewer adverse effects than newer antidepressant drugs called selective serotonin reuptake inhibitors (SSRIs).

Side effects were gauged by the number of people who quit the studies because of side effects.

Second Opinion

Here's what the National Center on Complementary and Alternative Medicine (NCCAM) says about St. John's wort:

"There is some scientific evidence that St. John's wort is useful for treating mild to moderate depression. However, recent studies suggest that St. John's wort is of no benefit in treating major depression of moderate severity," says the NCCAM's web site.

The NCCAM is a branch of the National Institutes of Health.

Quality May Vary

The quality of St. John's wort products may vary, say Linde and colleagues.

"We recommend avoiding products that do not provide important information on the content, such as the amount of total extract (e.g. 900 mg), the extraction fluid (e.g. methanol 80% or ethanol 60%), and the ratio of raw material to extract (e.g. 3-6:1)," they write.

Possible Drug Interactions

The review also reminds people that St. John's wort can interact with other drugs. Doctors should "regularly ask" their patients if they're taking St. John's wort, says the review.

It's best to tell your doctor about any herbal products, vitamins, or other treatments you're taking. That way, he or she can watch out for any interactions between treatments.

Every year, nearly 19 million U.S. adults have a depressive illness; that's 9.5% of the population, says the National Institute of Mental Health. Depression can damage physical health while plaguing the mind and emotions.

However, it's a treatable condition. Methods include counseling, medication, and lifestyle change. Asking for help is the first step, so reach out if you suspect depression.

SOURCES: Linde, K. The Cochrane Library, 2005: Issue 3. National Institute of Mental Health: "Depression." Health Behavior News Service.