American Scullcap
Scientific Name: Scullcap
Other Names: Blue Pimpernel, Common Scullcap, Helmet Flower, Hoodwort, Mad-Dog Weed, Quaker Bonnet, Scutellaria lateriflora, Skullcap
Should I take it?
American scullcap is different from a related species called Baikal scullcap or Chinese scullcap (Scutellaria baicalensis). While the roots of Baikal scullcap have been used in Asian countries to fight infections, it is the "aerial parts"--flowers, leaves, and stems--of American scullcap that are collected and dried for medical use. A perennial that can be up to three feet tall, American scullcap is a member of the mint family of plants. Growing wild in woods and damp meadows throughout North America, it bears clusters of distinctive cap or helmet-shaped blue or purple flowers in late summer.
In colonial times, American scullcap was believed to be effective for treating rabies, but that use has been disproved. At various times, it has also been advocated as a tonic for alleviating premenstrual syndrome, a remedy for epilepsy, treatment for mental illnesses, and a fever reducer. None of these uses has been proved in clinical studies. However, because it has slightly calming effects, American scullcap has been used to relieve nervous tension and help bring on sleep. Today, more effective and less potentially harmful remedies are available.
Dosage and Administration
Note: American scullcap products may be contaminated with other substances, such as germander, a similar-looking plant that is sometimes called pink scullcap. Taking germander has caused liver damage and death. Individuals who decide to use American scullcap should be sure to purchase a reputable commercial product.
Although dosing for American scullcap varies, a common recommendation for its use is 1,000 mg to 2,000 mg (one gram to 2 grams) of the dried herb made into a tea by soaking it in about 5 ounces of boiling water for 5 minutes to 10 minutes. Solid particles are removed before the tea is ingested. American scullcap tea may be taken up to three times a day. Although American scullcap may be available by itself, more often it is combined with valerian or other herbals to increase their sedating effects.
Summary
In current western herbal medicine, the main use of American scullcap is for mild sedation--usually in combination with other sedating herbals.
Risks
Taking American scullcap has been associated with several cases of liver damage. Although the damage likely was caused by a similar plant called germander, individuals with any type of liver condition should not take American scullcap. Pregnant women, women who are breast-feeding, and children under the age of 18 should also avoid taking American scullcap.
Side Effects
American scullcap may be contaminated with germander, a similar-looking plant, which has been found to damage the liver. Very large doses of American scullcap have been reported to cause confusion, irregular pulse, or movements that mimic seizures.
Interactions
Interactions with American scullcap are not well defined. Because it promotes sleepiness, American scullcap can increase the sedation associated with certain prescription drugs, non-prescription drugs, other herbals, and alcohol. It should not be taken at the same time as drugs for anxiety, colds and coughs, epilepsy, or insomnia. Many other medications may cause drowsiness, so a doctor or pharmacist should be consulted before American scullcap is taken with any prescription, non-prescription, or herbal product.
Last Revised July 18, 2007
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Should I take it? 
