Passion Flower is the herb of choice for treating intransigent insomnia. It aids the transition into a restful sleep without any narcotic hangover. It may be used wherever an anti-spasmodic is required, e.g. in Parkinsons disease, seizures and hysteria. It can be very effective in nerve pain such as neuralgia and the viral infection of nerves called shingles. The New Holistic Herbal by David Hoffmann Pg. 221