Passion flower - and More - for Stress
If you are using medications to help reduce or manage your stress, consider natural methods of stress-reduction. Practices such as breath work, meditation or guided imagery are all helpful, as are spearmint and chamomile teas - both are mildly relaxing, and you can drink as much of them as you want. Another (stronger) remedy is passion flower, made from a plant (Passiflora incarnata) native to the southeastern United States. Passion flower products are available at herb and health food stores. The dose is one dropperful of the tincture in a little water or two capsules of a standardized extract up to four times a day as needed. Passion flower is non-sedating.
— Excerpt from Dr. Weil web page newsletter