Valerian Root & Possible Side Effects

Dried valerian root, also known as garden heliotrope and vandal root, is an herbal preparation commonly used for its mild sedative properties. The "PDR for Herbal Medicines" reports that valerian root may alter brain chemistry by increasing the level of the neurotransmitter gamma-aminobutyric acid, or GABA. Similar to medications, herbal supplements such as valerian root may cause side effects. To reduce the risk of adverse side effects or interactions with medications, talk with your doctor before taking valerian root or any other herbal supplement.

Morning Drowsiness

Many people use valerian root primarily as a sleep aid to relieve insomnia. Morning drowsiness is a possible side effect of valerian root, reports the National Library of Medicine encyclopedia MedlinePlus. If you experience morning drowsiness with valerian root, you may need to reduce your dose. Be cautious about performing potentially dangerous tasks if you are drowsy.

Dizziness

Dizziness may occur as a side effect of valerian root, according to the Office of Dietary Supplements of the National Institutes of Health. Take appropriate precautions to reduce the possibility of falls or other injuries if you become dizzy. Talk with your doctor if you experience persistent or severe dizziness.

Headache

Headaches are a possible side effect of valerian root treatment, report Drs. Susan Hadley and Judith Petry in an April 2003 article published in "American Family Physician." Talk with your doctor about an alternative form of therapy if you experience regular headaches associated with use of valerian root.

Withdrawal

Although rare, some patients taking valerian root have experienced withdrawal symptoms after discontinuation of use, reports the National Toxicology Program of the U.S. Department of Health and Human Services. Possible signs and symptoms of withdrawal include tremors, agitation, increased heart rate and blood pressure, confusion and hallucinations.

Stomach Upset

You may experience mild stomach upset associated with use of valerian root, according to the National Center for Complementary and Alternative Medicine. If you experience this side effect, consider reducing your dose or taking the supplement with food. Talk with your doctor if you experience persistent or severe stomach upset, which may indicate an underlying medical problem.

Liver Inflammation

Liver inflammation has been reported as a rare adverse side effect of valerian root, notes the "PDR for Herbal Medicines." Most patients who experienced this side effect took combination herbal remedies that included valerian root. It remains unclear whether valerian root, other herbs or possible contaminants may have caused the toxic effects on the liver. Talk with your doctor about possible liver-related side effects associated with valerian root, especially if you have liver disease or take medications that may adversely affect your liver.