Is skullcap the same as Chinese skullcap?

No. Chinese skullcap (Scutellaria baicalensis) is a different species with a different traditional role. Calm Nerve contains American skullcap.

Is skullcap safe for the liver?

The reports I know of are linked to germander contamination. Because that risk is real, sourcing matters. If you have liver disease or take medicines that affect the liver, speak to your GP or practitioner first.

Is skullcap addictive?

I am not aware of any evidence of dependence. The EarthWise safety guidance describes Calm Nerve as non-habit-forming.

Can I take skullcap with antidepressants?

Please speak to your GP or practitioner first. The EarthWise guidance asks anyone on sedatives, anxiolytics or antidepressants to check before using Calm Nerve.

Is skullcap safe in pregnancy?

Safety is not established, so it is not recommended in pregnancy or breastfeeding.

Skullcap: What It Is, How It Works, and When to Use It

Sarah Burt

Oct 14

6 min read

Skullcap (Scutellaria lateriflora) is a North American herb that has been used in Western herbal practice for generations as a nervine, a herb traditionally used to support the nervous system. It has a firm place in the practitioner's cabinet and very little clinical research behind it. That gap is worth being clear about, and so is the quality problem that has affected the skullcap market. It is one of the four herbs in the EarthWise Calm Nerve tonic.

Close-up of Skullcap with green buds and leaves against a soft blurred garden background.

What it is

American skullcap belongs to the mint family (Lamiaceae), and is native to North America, where it grows in damp meadows and along streams. It is a slender perennial with square stems, as mint-family plants have, small blue flowers that sit along one side of the stem, and a calyx that looks like a tiny helmet, which is where the name comes from. The part used is the dried aerial part of the plant, harvested while it is in flower.

It is often called Virginian or mad-dog skullcap. The common name matters because several different plants are called skullcap. Chinese skullcap (Scutellaria baicalensis) is a different herb with a different traditional role, mostly used for its root. When I write skullcap in this guide I mean the American species, which is the one in Calm Nerve.

A buyer's note worth reading. Skullcap has a history of adulteration with germander (Teucrium species), a plant linked to liver injury. This was a concern in the supplement market some years ago, and it is one reason I regard sourcing as part of the safety information for this herb and not an afterthought. Look for a supplier who names the species as Scutellaria lateriflora, identifies the plant part and can show that the material has been checked. A cheap product with no Latin name is a poor bargain here.

The active compounds

Skullcap contains flavonoids, including baicalin, scutellarin and their related compounds, together with other plant constituents such as volatile oil and tannins.

Flavonoids. In laboratory studies these compounds interact with receptors in the brain that are involved in calming signals. That is the usual explanation offered for skullcap's reputation. The work comes from cell and animal studies, and how well it applies to a person who takes skullcap by mouth is not established.

Other constituents. The herb also contains compounds that contribute to its bitter taste and its antioxidant activity in the laboratory. I do not make any specific claims about these.

How it is traditionally used

Skullcap is a classic nervine in the Western herbal tradition. Practitioners have used it for nervous tension, restlessness and a mind that is slow to settle, often alongside other nervine herbs such as passionflower and lemon balm. For more on this class of herbs, my guide to nervine herbs explains how they are used.

I am not aware of an EU herbal monograph for American skullcap. That means there is no formal European assessment of traditional use, doses or safety for me to point to, and it is one reason I regard the information in this guide as less settled than for herbs that have one.

What the research shows

Skullcap has been studied far less than most herbs in this library, and I want to be straightforward about it.

Early evidence: mood and anxiety. A randomised crossover trial carried out as part of a doctoral thesis (Brock, 2012) gave 350 mg of skullcap three times a day for 14 days. 43 people were randomised and 31 were included in the analysis. The thesis reported no significant difference from placebo on the anxiety and mood scales used (the Beck Anxiety Inventory and the Profile of Mood States). A paper from the same programme was published in Phytotherapy Research in 2014 (volume 28, issue 5, pages 692 to 698). I have not read that paper in full, so I do not summarise its findings here, and I would encourage anyone interested to read it directly.

Safety evidence. There is no large body of safety data. The main concern I know of is adulteration with germander and the liver risk that goes with it, and not skullcap itself. Reported liver problems linked to skullcap products have often been attributed to contamination or misidentification, though that is difficult to prove after the fact.

Sarah's clinical perspective

I use skullcap in Calm Nerve as a tincture at a 1:4 ratio in 25% ethanol, alongside Passionflower, Lemon Balm and Ashwagandha. I include it for its long traditional use as a nervine.

I am careful with anyone taking prescribed sedatives, anxiolytics or antidepressants, and I ask them to speak to their GP or practitioner first. I also pay close attention to where the herb comes from, given the history of adulteration.

Practical guidance

Dose. There is no established tincture dose and no EU monograph to cite. The one trial I have described used 350 mg of dried herb three times a day for 14 days. That is the amount used in a study, and it is not a dosing instruction for any particular product.

Format. A tincture or a dried herb tea are the traditional forms. Whichever form you choose, the source and the age of the material matter.

Time to effect. There is no clinical timeline. Herbalists generally allow a couple of weeks to judge a response.

Timing. There is no established timing. In practice, the evening is common for use as part of a wind-down routine.

What it does not replace. Skullcap does not replace medical or psychological support for anxiety, low mood or sleep problems. Persistent worry, panic, low mood that lasts weeks or any thoughts of harming yourself need a GP, and an emergency service if you are in crisis.

For how to take the EarthWise tonic specifically, the dose and full safety information are on the product page.

Common questions

Is skullcap the same as Chinese skullcap? No. Chinese skullcap (Scutellaria baicalensis) is a different species with a different traditional role. Calm Nerve contains American skullcap.
Is skullcap safe for the liver? The reports I know of are linked to germander contamination. Because that risk is real, sourcing matters. If you have liver disease or take medicines that affect the liver, speak to your GP or practitioner first.
Is skullcap addictive? I am not aware of any evidence of dependence. The EarthWise safety guidance describes Calm Nerve as non-habit-forming.
Can I take skullcap with antidepressants? Please speak to your GP or practitioner first. The EarthWise guidance asks anyone on sedatives, anxiolytics or antidepressants to check before using Calm Nerve.
Is skullcap safe in pregnancy? Safety is not established, so it is not recommended in pregnancy or breastfeeding.

Where skullcap appears in the EarthWise range

Skullcap is one of the four herbs in Calm Nerve, Sarah's formula for nervous system support, where it sits with Passionflower, Lemon Balm and Ashwagandha.

If you are not sure which formula fits, the EarthWise health quiz is the best place to start. Full safety information is on each product page.

When to seek professional support

Check with a practitioner first in these situations:

Prescribed sedatives, anxiolytics or antidepressants. Skullcap is traditionally used to support calm, and combining it with these medicines is a question for your GP or pharmacist.
Liver disease, or medicines that affect the liver. The adulteration history makes this a sensible precaution.
Pregnancy and breastfeeding. Not recommended, as safety has not been established.
Thyroid conditions requiring medication. This applies to Ashwagandha in Calm Nerve, which is contraindicated in that situation.
Persistent anxiety, panic or low mood. These deserve proper assessment, and a herb is not a replacement for it.
Yellowing of the skin or eyes, dark urine or pale stools. Stop and see a doctor promptly.
Under 18. There is no guidance on use in children and adolescents, so I would not use it without a practitioner.

Sarah Burt is a registered naturopath, medical herbalist and iridologist with 25+ years of clinical experience. All EarthWise tonics are formulated by Sarah based on her clinical protocols.

Looking to explore more ways to support your body naturally? Browse our video library or discover our full range of educational content

This article is for informational purposes only and is not intended to diagnose, treat or cure any health condition. Always consult a qualified health practitioner before making changes to your health regimen.