Guide
Who should not take skullcap?
Ask a doctor before taking skullcap if pregnant, breastfeeding, dealing with liver or kidney disease, or taking a prescription medication; this guide is for adults, and skullcap hasn't been studied in children.
Ask a doctor before taking skullcap if you are pregnant, breastfeeding, have liver disease or kidney disease, or take a prescription medication — particularly a sedative, benzodiazepine, or a drug your body clears through the liver. This guide is written for adults; skullcap hasn't been studied in children.
Pregnancy and breastfeeding
Neither species of skullcap has been tested in pregnant or breastfeeding people in a controlled trial. Ask your doctor before taking skullcap if you are pregnant or breastfeeding — the general absence of safety data in this population, not a specific finding of harm, is the reason for caution here.
Children
This guide is written for adults, not children — skullcap hasn't been studied in that age group, and there's no dosing information for anyone under 18 to point to.
Liver conditions
Ask your doctor before taking skullcap if you have liver disease. As covered in skullcap side effects, documented liver injury cases exist for both species: American skullcap historically through adulteration with a toxic look-alike plant (germander), and Chinese skullcap directly, in a combination supplement, in two published case reports. Anyone with an existing liver condition has less reserve to absorb an unexpected reaction.
Kidney conditions
Ask your doctor before taking skullcap if you have kidney disease. No study has specifically measured how skullcap's compounds are cleared by impaired kidneys, so there's no dosing adjustment to offer — only a reason to check first.
People taking sedatives or CNS-affecting medications
Skullcap is traditionally classified as a calming herb, and Chinese skullcap's baicalin has been shown, in animal studies, to change how the liver processes several other compounds (see skullcap and medications: what to check). Ask your doctor or pharmacist before combining skullcap with a benzodiazepine, a sleep medication, or alcohol.
Before surgery
As a general precaution with herbal supplements, not a specific finding about skullcap, it's common practice to stop any herbal supplement one to two weeks before a scheduled surgery and tell the surgical team what you've been taking. No study has tested skullcap around a surgical procedure specifically, so this is a general caution rather than a documented risk.
Taking it alongside other supplements
If you're already taking another supplement marketed for calm or relaxation — melatonin, ashwagandha, valerian, or a magnesium product, for example — stacking a second calming herb on top adds an unknown, untested combination rather than a studied one. Nothing establishes that combining them is harmful, but nothing establishes it's additive or safe either; a doctor or pharmacist can weigh in on a specific combination.
Questions people ask
Who should avoid skullcap?
People who are pregnant or breastfeeding, children, anyone with liver or kidney disease, and anyone taking a prescription medication should talk to a doctor before starting skullcap, for the reasons above.
Can skullcap cause liver damage?
Documented case reports link liver injury to both American skullcap (through adulteration with germander) and Chinese skullcap (in a combination supplement) — see skullcap side effects for the specifics of each.
Is skullcap hard on the kidneys?
There's no research specifically measuring skullcap's effect on the kidneys, in either direction. That absence of data, rather than a specific finding, is why anyone with kidney disease should ask a doctor first.
Related reading: skullcap side effects, skullcap and medications: what to check, and how much skullcap should you take a day.
Sources
- Hepatotoxicity associated with chinese skullcap contained in Move Free Advanced dietary supplement: two case reports and review of the literature Two case reports found liver injury in patients taking a joint-health supplement containing Chinese skullcap combined with black catechu; the injury resolved after stopping the product, and Chinese skullcap was judged the most likely cause.
- Herbal hepatoxicity from Chinese skullcap: A case report A case report describes a patient whose liver injury from a Chinese skullcap-containing joint supplement resolved after stopping it, then recurred when she restarted the same product, confirming the link in that individual.
- Skullcap and germander: preventing potential toxicity through the application of hyperspectral imaging and multivariate image analysis as a novel quality control method A plant-quality-control study noted that liver injury cases attributed to skullcap products have been linked to adulteration with germander, a toxic look-alike plant, and developed lab methods to detect it.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.