Herbal treatment for anxiety: Is it effective?

Several herbal remedies have been studied as a treatment for anxiety, including kava, passion flower, valerian and theanine.

The most popular herbal treatment for anxiety is kava. Numerous studies have demonstrated the effectiveness of kava in reducing anxiety, with effects observed after as few as one to two doses. However, there is concern that kava may be harmful to the liver.

Multiple cases of liver damage — including hepatitis, cirrhosis and liver failure — associated with kava use have been reported in Europe. As a result, several countries have banned the sale of kava due to safety concerns. The Food and Drug Administration has issued warnings about kava but hasn't banned the sale of kava in the United States.

Some evidence suggests that passion flower, valerian and theanine also may reduce anxiety and are generally considered to be safe herbs, with few reported adverse side effects. However, more research is needed to fully evaluate the effectiveness and safety of these herbal supplements for such use.

If you are considering a trial of a dietary or herbal supplement as a treatment for mild anxiety, talk to your doctor first. Also, if your anxiety is interfering with daily activities, consider working with a mental health specialist as well.