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Tossing and turning every night? Discover what valerian root really does for your sleep before you buy it.

Dr. Priya Sammani (MBBS)
Medically Reviewed by Dr. Priya Sammani (MBBS) ✓ Medically Reviewed
📅 Updated: Oct 20, 2026 • ⏱ 8 min read • Editorial Policy
Tossing and turning every night? Discover what valerian root really does for your sleep before you buy it.
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Do you lie awake at night while your mind races with a hundred different thoughts? If tossing and turning has become your nightly routine, you are certainly not alone. Many people search for natural ways to calm their minds and drift off to sleep without prescription sleeping pills.

That search often leads to popular herbal remedies like valerian. You might have heard that it helps you relax and get a better night's rest. However, before you take any herbal supplement, you need to understand what valerian is, how it works, and whether it is truly safe for you.

Let's take a close look at valerian root, its potential benefits, its risks, and what you must discuss with your doctor before trying it.

Key Takeaways About Valerian Root

  • Valerian is a herbal supplement commonly used to help with mild sleep problems and restlessness.
  • Unlike standard medicines, herbal supplements are not strictly regulated for purity or exact dosage strength.
  • Valerian can cause side effects like dizziness, headaches, and next-day drowsiness.
  • You must never mix valerian with alcohol, sleeping pills, or certain prescription medicines.
  • Always talk to your doctor before starting valerian, especially if you are pregnant, nursing, or have a chronic health condition.
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What Is Valerian?

Simply put, valerian is a flowering plant that grows in parts of Europe and Asia. The medicinal part of the plant is found mainly in its roots. Extracts made from these dried roots are traditionally used to calm anxiety and promote better sleep.

You can find valerian sold in pharmacies and health food stores in several different forms. Common options include tablets, capsules, and liquid extracts that you mix with water.

However, there is an important fact that everyone needs to understand about herbal products. When you buy regular medicine from a pharmacy, such as paracetamol, government health authorities regulate it strictly. These standard drugs must meet high standards for purity, safety, and exact active ingredient amounts.

Herbal supplements like valerian do not go through that same strict regulatory process. Because of this, the amount of active valerian in one bottle can vary a lot compared to another brand. Manufacturers cannot always guarantee 100 percent purity in every batch.

For this reason, assuming a product is completely safe simply because it is natural can be risky. Taking time to learn about any supplement before you use it is always a wise choice for your health.

Things Your Doctor Needs to Know Before You Use Valerian

If you are thinking about trying valerian to help you sleep, you should talk to your family doctor first. This step is especially important if you have any existing health conditions or take other medicines.

Be sure to tell your doctor openly if any of the following situations apply to you:

  • Mental health conditions: If you experience depression or anxiety, valerian might change your symptoms or interact with your current treatment plan.
  • Liver or kidney disease: Your liver and kidneys clear medicines out of your body. If they do not work well, valerian can build up in your system and cause more side effects.
  • Alcohol use: Drinking alcohol regularly while taking valerian can cause dangerous drowsiness and severe dizziness because both substances slow down your nervous system.
  • Pregnancy: If you are pregnant or trying to get pregnant, you should avoid valerian because researchers have not done enough safety studies on developing babies.
  • Breastfeeding: Valerian components can pass into breast milk, and experts do not know how those components might affect a nursing infant.
  • Allergies: If you have allergies to other herbs, foods, or medicines, you might have a higher chance of being allergic to valerian.

How to Use Valerian Safely

If your doctor gives you the green light to try valerian, you need to use it correctly. Always follow your doctor's specific advice or the instructions printed on the product label.

  • Take valerian tablets or liquid extracts with a full glass of water.
  • If valerian upsets your stomach, try taking your dose along with a meal or a healthy snack.
  • Never take more than the recommended dose listed on the package or suggested by your doctor.

What to Do If You Take Too Much

If you think you or someone else accidentally took too much valerian, you must act quickly. Call your local emergency services or poison control center right away. In the US, call 911 or Poison Control at 1-800-222-1222. In the UK, call 999 or NHS 111. You can also go straight to the nearest hospital Emergency Department. Taking too much of any calming herb is serious and requires immediate medical attention.

Valerian Drug Interactions

When doctors talk about drug interactions, they mean what happens when two different substances mix inside your body. Combining valerian with certain medicines or substances can change how well they work or cause unwanted side effects.

You should avoid taking valerian if you currently use any of the following:

  • Alcohol: Combining valerian and alcohol causes extreme drowsiness, poor coordination, and slowed reflexes.
  • Sleeping pills: Taking prescription sleep aids with valerian can make your sleepiness dangerously deep and difficult to wake from.
  • Anxiety or depression medicines: Valerian can interact with these drugs and alter their normal effects on your brain.
  • Muscle relaxants: Mixing muscle relaxants with valerian increases dizziness and makes you feel very sluggish.
  • Narcotic pain medicines: Strong pain medicines combined with valerian can dangerously depress your breathing and brain function.

To keep you safe, give your doctor a complete list of everything you take. Mention all prescription drugs, over-the-counter medicines, vitamins, herbal supplements, and whether you smoke or drink alcohol.

Emergency Red Flags: When to Seek Urgent Help

Stop taking valerian right away and seek emergency medical care if you notice any signs of a severe allergic reaction, such as:

  • Sudden trouble breathing or shortness of breath.
  • Swelling of your face, lips, tongue, or throat.
  • A widespread skin rash, hives, or severe itching.
  • Extreme confusion, unresponsiveness, or inability to stay awake.

What Side Effects Can Happen?

Like any medicine or supplement, valerian can cause side effects. Most people tolerate it well at normal doses, but some mild issues can still occur.

Side Effect Category Common Symptoms What You Should Do
Mild Side Effects Headache, dizziness, upset stomach, or feeling sluggish the next morning. Stop taking the supplement and let your doctor know if these feelings continue.
Severe Allergic Reactions Skin rash, itching, swelling of the face, tongue, or throat, and breathing trouble. Get emergency medical help right away (Call 911 or 999).

A very important safety warning: Because valerian causes drowsiness and dizziness, you must never drive a car, operate heavy machinery, or do tasks that require sharp focus after taking it. Imagine taking valerian and then trying to drive on a busy road. That puts you and everyone else on the road in serious danger.

Older adults need to be especially careful. Dizziness from valerian can lead to sudden falls, which can cause serious bone fractures or head injuries.

💡 Take-Home Message

  • Valerian is a herbal supplement used to help with sleep and relaxation, but it is not a strictly regulated drug.
  • Its strength and purity can vary from one product brand to another.
  • Always talk to your doctor before taking valerian, especially if you have other health issues or take prescription medicines.
  • Natural does not mean completely safe for everyone.
  • Never drive or operate machinery after taking valerian because it causes drowsiness.
  • Seek emergency medical care if you experience signs of a serious allergic reaction.
❓ FAQ

Frequently Asked Medical Questions (FAQ)

Evidence-based clinical answers to common patient questions

What is valerian root commonly used for?

Valerian root is most commonly used as a natural remedy to help people fall asleep faster and ease mild restlessness or anxiety. Many people turn to it when they struggle with occasional sleeplessness due to everyday stress.

Is it safe to drink alcohol while taking valerian?

No, you should avoid drinking alcohol while taking valerian. Both alcohol and valerian slow down your central nervous system, so combining them can cause severe drowsiness, dizziness, and impaired judgment.

Can valerian make you feel sleepy the next day?

Yes, some people experience a hangover-like grogginess or morning drowsiness after taking valerian. This effect is more likely if you take a high dose or take it too late at night.

How long does it take for valerian to start working?

Valerian usually needs to be taken about 30 minutes to two hours before bedtime. While some people notice a calming effect right away, others need to take it consistently for a couple of weeks to see noticeable improvements in their sleep.

Can children or pregnant women take valerian?

Pregnant and breastfeeding women should avoid valerian because there is not enough scientific safety data. Similarly, giving valerian to children is not recommended unless explicitly advised by a pediatrician.

📚

Verified Scientific & Medical References (PubMed / WHO)

✓ Peer-Reviewed Sources
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