Valerian Drug Profile

What is Valerian?

Valerian is an herbal supplement derived from the root of the Valeriana officinalis plant, a perennial flowering herb native to Europe and Asia. It belongs to the class of natural sedatives and sleep aids, commonly used as an alternative remedy for insomnia and anxiety. Valerian has been used medicinally for over 2,000 years and is one of the most widely studied herbal sleep remedies.

Uses

• Insomnia and sleep disorders: Most common use for improving sleep quality and reducing time to fall asleep
• Anxiety and stress: Used to promote relaxation and reduce feelings of nervousness
• Restlessness: May help calm agitation and promote a sense of tranquility
• Muscle tension: Traditional use for relieving physical tension and promoting muscle relaxation
• Menopausal symptoms: Sometimes used to address sleep disturbances and mood changes during menopause

How it works

Valerian appears to work by increasing levels of gamma-aminobutyric acid (GABA) in the brain, a neurotransmitter that promotes relaxation and reduces nervous system activity. The herb contains several active compounds, including valerenic acid and isovaleric acid, which may interact with GABA receptors and other brain chemicals involved in sleep regulation. This mechanism is similar to how some prescription sleep medications work, though valerian’s effects are generally milder.

Side effects

Common side effects:

• Drowsiness or grogginess, especially the next morning
• Headache
• Dizziness
• Stomach upset or nausea
• Vivid dreams or unusual dreams
• Dry mouth
• Mental fogginess or difficulty concentrating

Serious side effects to watch for:

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• Severe allergic reactions (rash, swelling, difficulty breathing)
• Liver problems (yellowing of skin or eyes, dark urine, severe fatigue)
• Severe depression or mood changes
• Difficulty breathing or slowed breathing
• Severe confusion or memory problems

Warnings and precautions

• Pregnancy and breastfeeding: Safety has not been established; avoid use during pregnancy and while nursing
• Children: Not recommended for children under 12 years old without medical supervision
• Liver disease: Use caution in patients with liver problems, as rare cases of liver toxicity have been reported
• Surgery: Discontinue at least two weeks before scheduled surgery due to potential interactions with anesthesia
• Driving and machinery: May cause significant drowsiness; avoid driving or operating heavy machinery after use

Interactions

• Sedatives and sleep medications: May increase drowsiness when combined with prescription sleep aids like zolpidem or benzodiazepines
• Alcohol: Can enhance sedative effects and increase risk of excessive drowsiness or respiratory depression
• Antidepressants: Particularly SSRIs and tricyclic antidepressants may have additive sedative effects
• Antihistamines: May increase drowsiness when combined with diphenhydramine or other sedating antihistamines
• Anti-anxiety medications: Can potentiate effects of benzodiazepines and increase risk of over-sedation
• Muscle relaxants: May enhance muscle relaxation effects and increase fall risk
• Other herbal sedatives: Kava, passionflower, and melatonin may have additive effects
• Blood thinners: Limited evidence suggests potential interaction with warfarin requiring monitoring

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Evidence summary

The scientific evidence for valerian’s effectiveness is mixed. There is moderate evidence supporting its use for improving sleep quality and reducing sleep latency, with several randomized controlled trials showing modest benefits. However, results are inconsistent across studies, and effect sizes are generally small. For anxiety, there is limited evidence of effectiveness, with few well-designed studies available. The quality of valerian preparations varies significantly between manufacturers, which may contribute to inconsistent results. For a comprehensive safety profile and detailed evidence review, visit supplement.ge.

Dosage

Typical adult dosages range from 300-900 mg of valerian root extract taken 30 minutes to 2 hours before bedtime for sleep support. For anxiety, doses of 120-200 mg may be taken 2-3 times daily. Standardized extracts containing 0.3-0.8% valerenic acid are commonly used. Some people may need to take valerian for several weeks before experiencing full benefits. Dosage should always be determined by a healthcare provider, as individual needs vary and interactions with other medications must be considered.

Sources: FDA DailyMed drug labels (public domain), BNF, WHO Essential Medicines List. This article is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before starting or stopping any medication.

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