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Related to blue pimpernel: Poor man's weather glass
A perennial herb that contains flavonoids, glucosides (scutellarein), bitter principles, iridoids, tannins and volatile oil; it is antispasmodic, digestive, sedative and a nerve tonic, and has been used for anxiety, depression, headaches, insomnia, premenstrual syndrome exacerbated by stress, and withdrawal from substance abuse. It was formerly used for rabies and seizures.
Skullcap should not be used when driving or when operating heavy machinery, as it causes drowsiness; in excess, skullcap may cause convulsions.