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Valerian Root Side Effects

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March 13, 2025

Valerian Root Side Effects: What You Need to Know Before Taking It

Medically reviewed by: 

Dr. Shiyan Ooi

School of Medical Sciences, University of Manchester

Valerian root is widely used as a natural sleep aid and stress reliever, but it's essential to understand its potential side effects before incorporating it into your routine.

Common Side Effects of Valerian Root

While valerian root is generally well-tolerated, some individuals may experience mild side effects, such as:

  • Drowsiness and fatigue
  • Dizziness
  • Headaches
  • Stomach upset or nausea
  • Vivid dreams

These effects are usually temporary and subside as the body adjusts to the supplement (National Institutes of Health).

Serious Risks and Interactions

Although rare, some individuals may experience more serious side effects, including:

  • Allergic reactions such as rash or difficulty breathing
  • Increased drowsiness when combined with alcohol or sedatives
  • Possible liver toxicity with long-term excessive use

Valerian root should not be combined with medications that affect the central nervous system, such as benzodiazepines, antidepressants, or sleep aids.

Who Should Avoid Valerian Root?

Valerian root may not be suitable for:

  • Pregnant or breastfeeding women
  • Individuals with liver disease
  • People who operate heavy machinery or drive frequently

Safe Usage Guidelines

To minimize risks, follow these guidelines when taking valerian root:

  • Start with a low dose (300-600 mg) and assess tolerance.
  • Avoid prolonged use beyond a few weeks unless advised by a healthcare provider.
  • Do not combine with alcohol or sedative medications.

Conclusion

Valerian root is a natural and effective sleep aid for many individuals, but it is essential to use it responsibly. Consult a healthcare provider if you have underlying health conditions or take other medications.

Dr. Shiyan Ooi

Dr. Shiyan Ooi is a medical doctor with over a decade of experience treating patients with chronic conditions. She graduated from the University of Manchester with a Bachelor of Medicine and Surgery (MBChB UK) and spent several years working at the National Health Service (NHS) in the United Kingdom, several Singapore government hospitals, and private functional medicine hospitals. Dr. Ooi specializes in root cause analysis, addressing hormonal, gut health, and lifestyle factors to treat chronic conditions. Drawing from her own experiences, she is dedicated to empowering others to optimize their health. She loves traveling, exploring nature, and spending quality time with family and friends.