Valerian Root Can Help You Sleep. The benefits and side effects.

Valerian is often described as a gentler alternative to conventional sleeping pills. However, natural does not automatically mean safe. It can cause side effects, interact with certain medicines and other substances, and may not be suitable for everyone.

In this guide, we will look at what the research says about valerian root, its potential benefits, dosage considerations, side effects, and precautions to know before considering it for sleep.

What Is Valerian Root?

Valerian (Valeriana officinalis) is a flowering plant native to parts of Europe and Asia. It also grows in North America and is cultivated in other regions.

Its root has a long history of use in traditional herbal medicine, particularly for restlessness, nervousness, and sleep difficulties. Today, valerian is available as an herbal supplement in many countries.

Depending on the product, valerian root may be dried, brewed into tea, or processed into a concentrated extract.

Common forms include:

• Capsules and tablets: Contain powdered valerian root or an extract.
• Herbal tea: Made by steeping dried valerian root in hot water.
• Liquid extracts: Concentrated preparations taken in measured amounts.
• Combination supplements: Contain valerian alongside other herbs or sleep-related ingredients.

These products are not necessarily interchangeable. Their chemical composition and concentration can vary, making it difficult to compare one supplement with another.

Valerian is also different from melatonin. Melatonin is a hormone that helps regulate the body’s sleep-wake timing, whereas valerian is an herbal preparation whose effects on the nervous system are still being investigated.

The important distinction is that traditional use does not prove effectiveness. Although valerian has been used for generations, modern research has not established that it reliably improves sleep.

Does Valerian Root Actually Help You Sleep?

The short answer is that valerian may help some people feel that their sleep has improved, but the scientific evidence is inconsistent.

Researchers have studied valerian for several sleep-related outcomes, including the time it takes to fall asleep, nighttime awakenings, and overall sleep quality. However, studies have produced mixed results.

Some trials have reported improvements in subjective sleep quality, meaning that participants felt they slept better. Other studies have found no meaningful difference between valerian and a placebo.

A 2024 umbrella review, which examined existing systematic reviews of valerian for insomnia, found that the available evidence did not convincingly establish valerian as an effective treatment for insomnia.

This distinction matters. Feeling that sleep has improved is a useful outcome, but it does not necessarily mean that a supplement consistently increases sleep duration, reduces the time needed to fall asleep, or improves objectively measured sleep.

What Does the Research Say?

Sleep-related outcome	Current evidence
Falling asleep faster	A reliable benefit has not been established.
Improving perceived sleep quality	Some studies suggest a possible benefit, but results are inconsistent.
Staying asleep throughout the night	Evidence is insufficient to establish a dependable effect.
Treating chronic insomnia	Valerian has not been established as an effective treatment.
Improving sleep for everyone	There is no convincing evidence of a consistent benefit across individuals.

The American Academy of Sleep Medicine’s clinical practice guideline recommends against using valerian to treat sleep-onset or sleep-maintenance insomnia in adults.

This does not mean that nobody will report a benefit. It means the available evidence is not strong enough to recommend valerian as an established treatment for chronic insomnia.

Why Are the Findings Inconsistent?

Several factors may explain why studies reach different conclusions.

Different preparations: Powdered root, herbal tea, and concentrated extracts may contain different amounts and combinations of plant compounds.

Small studies: Some trials have included relatively few participants, limiting the strength of their conclusions.

Different measurements: Researchers may assess how people feel about their sleep or use objective measurements. These outcomes do not always agree.

Short treatment periods: Many studies have been relatively short, leaving questions about long-term effectiveness unanswered.

For now, valerian is best described as an herbal supplement with uncertain sleep benefits, rather than a proven solution for insomnia.

What Are the Potential Benefits of Valerian Root?

Valerian continues to attract interest because of its traditional use for relaxation and sleep difficulties. However, its potential benefits should be understood in the context of the limited evidence.

1. It May Improve Perceived Sleep Quality

Some studies suggest that people taking valerian report improvements in their perceived sleep quality.

However, not all studies have found this result, and the evidence is insufficient to establish a dependable benefit. Researchers also need to determine whether particular preparations work better than others and whether certain groups of people are more likely to benefit.

It would therefore be premature to describe valerian as a reliable sleep enhancer.

2. It May Have Calming Properties

Valerian contains several compounds that researchers have investigated for possible effects on the nervous system.

Some laboratory and experimental research suggests that certain constituents may influence gamma-aminobutyric acid (GABA), a neurotransmitter involved in regulating neuronal activity.

This has led researchers to explore whether valerian might have calming or sedative properties.

However, a proposed biological mechanism does not prove that a supplement produces a meaningful benefit in people. The exact way valerian may affect the human nervous system remains incompletely understood.

It is more accurate to say that valerian has potential calming properties under investigation than to claim that it reliably reduces stress or induces sleep.

3. It Offers an Option for People Exploring Herbal Supplements

Some people prefer herbal products when exploring ways to manage sleep difficulties.

That preference is understandable, but it should not replace an assessment of persistent insomnia. Herbal supplements can have side effects, interact with medicines, and vary in quality.

For adults with chronic insomnia, cognitive behavioral therapy for insomnia (CBT-I) is recommended as a first-line treatment by major sleep medicine guidelines.

CBT-I addresses the thoughts, behaviors, and sleep-related patterns that can maintain insomnia. Valerian has not been shown to provide equivalent benefits.

How Might Valerian Root Affect the Brain and Sleep?

Scientists have investigated several possible mechanisms through which valerian might influence relaxation and sleep, but none has established a clear explanation for a consistent clinical benefit.

One area of interest is GABA, a major inhibitory neurotransmitter in the central nervous system. In simple terms, GABA helps regulate nerve-cell activity.

Some experimental studies suggest that compounds in valerian may affect GABA-related signaling. However, the relationship between these compounds and their effects in humans is complex.

It would be misleading to conclude that valerian works like prescription sedatives simply because both have been discussed in relation to GABA.

Valerian also should not be confused with melatonin. Melatonin helps regulate circadian timing, while valerian’s proposed effects are less clearly established. The two supplements have different evidence bases, potential uses, and safety considerations.

Valerian Root Dosage: What Should You Know?

There is no universally established valerian dose that has been proven to treat insomnia effectively.

Clinical studies have used different preparations and amounts, making it difficult to identify one dose that is both effective and appropriate for everyone.

For example, a capsule containing powdered root is not necessarily equivalent to a capsule containing a concentrated extract. A cup of valerian tea may also differ substantially from a studied extract.

The number of milligrams on a supplement label does not always allow a straightforward comparison between products.

How to Choose a Valerian Supplement

If you are considering a valerian product, pay attention to the following:

• Check the preparation: Look for whether the product contains powdered root, an extract, or another form.
• Read the ingredients: Combination products may contain additional herbs or sleep-related ingredients that affect safety.
• Look for quality testing: Where available, choose products independently tested for identity, purity, and contaminants. Such testing does not prove that the supplement improves sleep.
• Avoid exaggerated claims: Be cautious of products claiming to cure insomnia or guarantee deep sleep.
• Review possible interactions: Ask a pharmacist or healthcare professional to check the product if you take medicines or other supplements.

Supplement regulations vary between countries. A product’s availability, popularity, or marketing claims should not be taken as proof that it works.

Follow the product’s instructions and seek professional advice when appropriate. Do not increase the amount because you have not noticed an effect. Taking more does not guarantee better sleep and may increase the risk of unwanted effects.

How Long Does Valerian Root Take to Work?

There is no reliably established time after taking valerian at which a person can expect to fall asleep.

Some products are marketed for use before bedtime, but that does not establish how quickly they work or whether they will improve sleep.

Avoid repeatedly taking extra doses because you do not feel sleepy. If sleep problems continue, it is more useful to investigate the cause than to keep increasing your supplement intake.

What Are the Side Effects of Valerian Root?

Valerian is generally tolerated by many adults during short-term use, but it can still cause unwanted effects.

Reported side effects include:

• Headache
• Stomach discomfort or digestive upset
• Mental dullness or reduced alertness
• Uneasiness or excitability
• Vivid dreams

The likelihood and severity of these effects may vary with the preparation, amount taken, individual sensitivity, and other substances used.

Drowsiness and Reduced Alertness

A product intended to help with sleep may affect alertness beyond the time when you want to be asleep.

If valerian leaves you drowsy, dizzy, or mentally dull, do not drive, operate machinery, or perform tasks that require quick reactions. Do not assume that feeling more awake means its effects on alertness have completely worn off.

Rare Reports of Liver Injury

Liver injury has been reported in people using valerian-containing products. In some cases, the products contained additional ingredients, making it difficult to establish whether valerian itself was responsible.

The risk appears uncommon, but it deserves attention.

Stop using the supplement and seek prompt medical assessment if you develop possible symptoms of liver injury, such as yellowing of the skin or eyes, dark urine, unusually pale stools, or significant unexplained abdominal discomfort.

If liver injury is suspected, do not restart the product without medical advice.

Is It Safe to Take Valerian Root Every Night?

Long-term safety has not been established.

The US National Center for Complementary and Integrative Health (NCCIH) reports that valerian appears to be safe for many adults when used in the short term, generally for up to six weeks. This does not mean that everyone can safely use it for that period or that longer use is safe.

Evidence about prolonged use, sustained benefits, and the effects of stopping after extended use remains limited.

There have also been reports of withdrawal symptoms following chronic valerian use, although the available evidence does not establish how frequently this occurs or how large the risk may be.

If you have been taking valerian regularly for a long time, speak with a healthcare professional before stopping or changing your use, particularly if you take other sedating medicines.

Do not assume that an over-the-counter supplement is suitable for indefinite nightly use.

If you continue to struggle with sleep, consider an assessment to identify possible causes rather than relying on a supplement indefinitely.

Valerian Root Interactions With Medicines and Alcohol

Valerian may have additive effects when combined with substances that cause drowsiness or reduce alertness. Its interaction profile is not fully understood, so caution is appropriate.

Alcohol

Avoid combining valerian with alcohol. Both may affect the central nervous system, and their combined effects on alertness and coordination may be unpredictable.

Sleeping Pills and Sedatives

Do not combine valerian with sleeping medicines or sedatives without medical guidance. This includes benzodiazepines and other medicines that cause drowsiness.

Combining substances with sedative effects may increase impairment and other adverse effects.

Other Medicines and Herbal Supplements

Some antihistamines, anxiety medicines, pain medicines, and other products can cause drowsiness. Ask a pharmacist or clinician to review your medicines before adding valerian.

Be particularly careful with combination sleep supplements containing melatonin, passionflower, lemon balm, or other herbs. Using several products together can make it harder to identify the cause of an adverse effect, and their combined safety and effectiveness may not be well established.

Do not discontinue prescribed medicines or replace them with valerian without discussing the change with your prescribing clinician.

Who Should Avoid Valerian Root or Seek Medical Advice First?

Valerian is not suitable for everyone.

People who are pregnant or breastfeeding: There is insufficient reliable safety information to establish that valerian is safe during pregnancy or breastfeeding. Avoid self-treating sleep problems with valerian during these periods and seek professional advice.

Children and teenagers: Safety and effectiveness have not been adequately established for all pediatric uses. Do not give valerian to a child for sleep difficulties unless a qualified clinician recommends and supervises its use.

People taking regular medicines: Ask a clinician or pharmacist about possible interactions if you take prescription medicines, over-the-counter drugs, or other supplements. This is particularly important when your medicines already cause drowsiness.

People with liver disease: Seek medical advice before considering valerian because rare reports of liver injury have occurred.

People with persistent sleep problems: Valerian should not delay an assessment of ongoing insomnia. Sleep difficulties may be related to medication effects, sleep apnea, restless legs syndrome, pain, mood disorders, or other medical conditions.

Finding and addressing the underlying cause is often more useful than trying another supplement.

Valerian Root vs. Melatonin: Which Is Better for Sleep?

Valerian and melatonin are often grouped together as natural sleep aids, but they have different biological roles.

Feature	Valerian root	Melatonin
What it is	An herbal preparation	A hormone also available as a supplement
Proposed role	Possible calming or sedative effects	Helps regulate circadian timing
Evidence for sleep	Inconsistent; not established as an effective insomnia treatment	More relevant to certain circadian rhythm problems; benefits depend on the situation
Role in chronic insomnia	Not recommended as an established treatment	Not a universal treatment for chronic insomnia
Main precautions	Possible side effects, interactions, and uncertain long-term safety	Possible side effects, interactions, and product-quality concerns

Neither supplement is a universal solution for sleep problems.

Melatonin may be useful in selected circumstances, such as certain circadian rhythm sleep-wake disorders. However, it is not appropriate for every type of insomnia. Valerian has less convincing evidence for treating insomnia.

The right approach depends on the cause of the sleep problem, your medical history, and the available evidence for the treatment being considered.

What Is More Effective for Chronic Insomnia?

For adults with chronic insomnia, cognitive behavioral therapy for insomnia (CBT-I) is recommended as a first-line treatment by major sleep medicine guidelines.

CBT-I is a structured treatment that addresses behaviors, thoughts, and sleep-related patterns that can maintain insomnia. It may include stimulus control, sleep scheduling, relaxation strategies, and work on unhelpful beliefs about sleep.

It is different from simply following general sleep hygiene advice, although healthy sleep habits can support treatment.

You can also take practical steps to support better sleep:

• Keep a consistent wake-up time, including on weekends.
• Allow adequate time for sleep.
• Reduce caffeine later in the day if it affects your sleep.
• Keep your bedroom dark, quiet, and comfortably cool.
• Develop a relaxing wind-down routine before bedtime.
• Avoid using alcohol as a sleep aid.
• Seek assessment if you regularly snore loudly, gasp during sleep, experience uncomfortable urges to move your legs, or remain excessively sleepy during the day.

These measures may support better sleep, but persistent insomnia often needs more than general lifestyle advice.

If sleep difficulties occur at least three nights a week for three months or longer and affect daytime functioning, arrange an assessment with a qualified healthcare professional. Seek help sooner if symptoms are severe or accompanied by concerning signs.

Frequently Asked Questions About Valerian Root

1. Does valerian root really help you sleep?

The evidence is inconsistent. Some studies suggest improvements in perceived sleep quality, but research has not established valerian as a reliable treatment for insomnia.

2. Can I take valerian root every night?

Long-term safety and sustained effectiveness have not been established. Discuss regular use with a healthcare professional, particularly if you take medicines or have persistent sleep problems.

3. Can I take valerian root with melatonin?

Do not combine them without checking with a healthcare professional. The safety and effectiveness of combining sleep supplements are not well established, and combining products may make unwanted effects harder to identify.

4. Is valerian root addictive?

The risk of dependence is not well characterized. Withdrawal symptoms have been reported after chronic use, although the available evidence is limited. Valerian should not automatically be considered risk-free simply because it is an herbal product.

The Bottom Line: Should You Try Valerian Root for Sleep?

Valerian root has a long history of traditional use, and some people report that it helps them feel that their sleep has improved. However, clinical research has produced inconsistent findings, and valerian has not been established as a reliable treatment for insomnia.

It can cause side effects, interact with alcohol and sedating substances, and has uncertain long-term safety. Pregnancy, breastfeeding, childhood use, liver disease, and regular medication use require particular caution.

If you are struggling with sleep, start by considering what might be causing the problem. Healthy sleep habits may help, while persistent insomnia often responds best to evidence-based treatment such as cognitive behavioral therapy for insomnia.

Valerian may be of interest as an herbal supplement, but it should not replace a proper assessment or an established treatment when one is needed.

Medical disclaimer: This article is for general educational purposes and is not a substitute for individualized medical advice, diagnosis, or treatment.

References

1. National Center for Complementary and Integrative Health (NCCIH). Valerian: Usefulness and Safety.
   https://www.nccih.nih.gov/health/valerian
2. Marques F, et al. Does valerian work for insomnia? An umbrella review of the evidence. European Neuropsychopharmacology. 2024.
   https://pubmed.ncbi.nlm.nih.gov/38359657/
3. Sateia MJ, et al. Clinical Practice Guideline for the Pharmacologic Treatment of Chronic Insomnia in Adults. Journal of Clinical Sleep Medicine. 2017;13(2):307–349.
   https://pubmed.ncbi.nlm.nih.gov/27998379/
4. Edinger JD, et al. Behavioral and psychological treatments for chronic insomnia disorder in adults: an American Academy of Sleep Medicine clinical practice guideline. Journal of Clinical Sleep Medicine. 2021;17(2):255–262.
   https://pubmed.ncbi.nlm.nih.gov/33164742/