Valerian Side Effects: Grogginess, Vivid Dreams & What to Know

Valerian is generally safe and well-tolerated, and most people who drink it as a tea notice nothing but a gentle calm. When side effects do happen, they are usually mild: some grogginess, vivid dreams, a dry mouth, or, in a small number of people, the opposite of what they expected, feeling more alert instead of sleepy. It is not addictive and does not cause the dependence that prescription sleep drugs can. Here is the honest, complete picture.

The common mild side effects

For most people, valerian's side effects are few and gentle. The ones occasionally reported include:

• Grogginess or drowsiness the next morning, usually only with larger doses or strong extracts, rarely with a cup of tea.
• Vivid or unusual dreams, which some people quite enjoy, and others find odd (more on this below).
• Dry mouth is a mild and common one.
• Mild digestive upset or headache in a few people.

In tea form, at a gentle culinary amount, these are uncommon. The stronger, concentrated valerian supplements are more likely to cause them than a blended tea.

Does valerian make you groggy the next morning?

It can, but usually only at higher doses, and far less often with tea than with concentrated capsules. Because valerian is calming rather than heavily sedating, most people wake rested rather than foggy. If you do notice morning grogginess, it is a sign to use a smaller amount or drink it a little earlier in the evening.

Does valerian cause vivid dreams?

Some people do report more vivid or memorable dreams on valerian. It is not harmful, and reactions are split; some find it pleasant, others find it strange. If vivid dreams bother you, reducing the amount or switching to a gentler herb like chamomile usually settles them.

Can valerian make you feel more awake instead of sleepy?

Oddly, yes, in a small minority of people. A subset reacts to valerian with a mild stimulant-like effect rather than relaxation, feeling more alert or restless. If that is you, valerian simply is not your herb, and chamomile or lavender may suit you better. This is uncommon, but worth knowing, so it does not surprise you.

Can valerian give you brain fog or make sleep worse?

For most people, no. Brain fog is usually linked to next-morning grogginess from too high a dose, and eases with a smaller amount. And while valerian improves sleep for many, the small group who get the stimulant-like reaction above may feel it makes sleep harder, in which case it is best avoided. Honesty matters here: Valerian is helpful for most, but not for everyone.

Is valerian addictive? Does it cause dependency or tolerance?

No. Valerian is not considered addictive and does not cause the physical dependence associated with prescription sleeping pills, so you can stop without the rebound insomnia that those can cause. Some people find it works a little less noticeably over time, and taking occasional breaks can help keep it effective, but this is not an addiction.

Will valerian make me feel drugged?

No. Valerian is a gentle, plant-scale calming herb, not a sedative drug, so it should not leave you feeling heavily medicated or out of it. If you ever feel more than pleasantly relaxed, you are likely using too strong a dose; ease back.

Does valerian interact with medications?

It can, and this is the most important safety point. Because valerian is calming, it can add to the effect of sedatives, sleeping pills, anxiety medication, and alcohol, potentially making you drowsier than intended. If you take any of these, or any other medication, check with your doctor before using valerian regularly.

Who should avoid valerian?

A few people should be cautious or skip it: anyone pregnant or breastfeeding (evidence is limited, so check with your doctor), children (unless a doctor advises), anyone taking sedatives, sleep or anxiety medication, and anyone due for surgery, as it is usually recommended to stop valerian a couple of weeks beforehand. If you have a liver condition, mention valerian to your doctor too.

What about the taste and smell?

Not a side effect exactly, but worth setting expectations: valerian has a strong, earthy, some say sock-like, smell and taste on its own. That is why it is almost always blended with gentler herbs. In a well-made blend like Sleep Restore, chamomile, mint and a touch of stevia balance it into a smooth, pleasant cup.

The bottom line

Valerian is safe and gentle for most people, with only mild, occasional side effects, and it is not addictive. The two things worth knowing: a small minority feel more awake rather than sleepy, and it can add to the effect of sedative medication, so check with your doctor if you take any. Used as a blended tea in a sensible amount, it is one of the gentlest natural sleep aids there is. For how it actually works and how to use it, see our guide to valerian root tea for sleep.

Frequently asked questions

Does valerian have side effects?

Usually only mild ones: occasional grogginess, vivid dreams, dry mouth, or rarely feeling more awake. In tea form, they are uncommon.

Is valerian addictive?

No. It does not cause the dependence that prescription sleep drugs can, and you can stop without rebound insomnia.

Does valerian make you groggy?

It can be taken at higher doses, but far less often with tea. If it does, use less or drink it earlier.

Can valerian make sleep worse?

For a small minority who react with a stimulant-like effect, yes, in which case it is best avoided. For most people, it helps.

Who should not take valerian?

Anyone pregnant, nursing, on sedative or sleep medication, or due for surgery should avoid it or check with their doctor first.