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Anxiety is a disorder with known etiology and clinical symptoms which is managed by combination therapy or the use of complementary and alternative medicine (CAM), such as psychopharmacotherapy, cognitive behavioral therapy, and herbal medicine. The approach of scientists is to identify natural anxiolytics, based on their active components and their mechanism of action. So far, several medicinal plants have been identified and their effective components have been isolated and characterized as having cellular and molecular targets to the central nervous system (CNS). Despite the progress made in identification, application and drug interaction issues of such products, further studies should be planned to minimize their side effects and enhance their efficiency and specificity for a given health condition. The use of natural anxiolytics, either alone or in combination with other remedies can be improved by managing the preparation protocols, the route and the form of administration. In this context, natural drinks such as coffee with high levels of caffeine may exacerbate the clinical symptoms of anxiety. On the other hands, theanine (present in tea leaves) can alleviate the symptoms of the disorder. The current information available on traditional medicine and pharmacognosy is promising for formulation of nutraceuticals more specifically, with highest efficiency for prevention and treatment of anxiety. This review article attempts to introduce major herbs/plants recognized for their anti-anxiety effects and explain the feasibility for their specific application. The methods for the extract preparation and optimum condition for using such materials as traditional medicine or for their use in new formulations as nutraceuticals is suggested. The review also includes information about anxiety disorders, etiology, symptoms, types, neurobiology and different approaches to ameliorate anxiety conditions.

Herbal Anxiolytics: Sources and Their Preparation Methods