Condition
    Limited
    Effectiveness 1/5

    Skullcap for Anxiety

    Skullcap is a traditional nervine for anxiety with a plausible GABA-A mechanism in preclinical models, but human trial evidence is essentially absent — one small placebo-controlled study suggested mood benefit and that is nearly the entire clinical literature.

    Overview

    Skullcap is a traditional nervine for anxiety with a plausible GABA-A mechanism in preclinical models, but human trial evidence is essentially absent — one small placebo-controlled study suggested mood benefit and that is nearly the entire clinical literature.

    Verdict

    Insufficient evidence

    Traditional use plus one tiny human study is not enough to recommend skullcap for anxiety over better-evidenced options.

    How It Works

    The flavonoids baicalin and baicalein bind the benzodiazepine site of GABA-A receptors in vitro, producing anxiolytic effects in rodent models without classic benzodiazepine sedation.

    Dosing & Protocol

    Typical dose

    Recommended dose
    1-2 g dried herb as tea up to 3x daily
    Expected timeframe
    Not established

    Protocol

    form
    Not applicable
    duration
    Not applicable
    co factor
    Evidence is insufficient. Small studies of American skullcap (Scutellaria lateriflora) at 350 mg three times daily, and single doses of 100-350 mg, reported modest improvements in mood and anxiety ratings in healthy volunteers, but there is no adequately powered randomised trial in diagnosed anxiety disorder. Chinese skullcap (S. baicalensis) is a different plant with a different safety profile and is often substituted in products.
    titration
    Not applicable
    starting dose
    Not applicable as an established treatment

    Evidence

    What the studies say

    The human evidence base consists of a single small crossover study (n=43) showing improved mood scores with American skullcap versus placebo, plus traditional-use documentation. Animal anxiolytic data are consistent but cannot substitute for trials. Compounding the uncertainty, historical hepatotoxicity case reports (usually involving germander-adulterated products) mean sourcing matters more than dose.

    An investigation into the efficacy of Scutellaria lateriflora in healthy volunteers

    Score: 4/10
    2003
    rct
    n=19

    Wolfson P, Hoffmann DL

    Preliminary evidence supports an anxiolytic effect of S. lateriflora.

    View source

    American skullcap (Scutellaria lateriflora): a randomised, double-blind placebo-controlled crossover study of its effects on mood in healthy volunteers

    Score: 6/10
    2014
    crossover
    n=43

    Brock C, Whitehouse J, Tewfik I +1 more

    American skullcap improved mood in healthy volunteers and was well tolerated.

    View source

    Plant-based medicines for anxiety disorders, part 2: a review of clinical studies with supporting preclinical evidence

    Score: 7/10
    2013
    systematic_review

    Sarris J, McIntyre E, Camfield DA

    Skullcap remains an under-researched anxiolytic with only preliminary clinical support.

    View source

    Safety

    Caveats

    Anxiety disorder is treatable - CBT and SSRIs have strong evidence, and delaying them for an unproven herb has a cost. Seek urgent help for panic attacks with chest pain, or any thoughts of self-harm. Safety ceiling: above roughly 1000 mg/day of American skullcap is unstudied. The critical issue is identity and hepatotoxicity: products labelled skullcap have been adulterated with germander, which causes severe liver injury, and Chinese skullcap in combination products (notably with green tea extract) is implicated in hepatotoxicity cases. Skullcap is sedating - do not combine with alcohol, benzodiazepines or other sedatives, and avoid before driving. Avoid in pregnancy and breastfeeding, and in liver disease.

    Less likely to help if

    Everyone with diagnosed anxiety disorder: no trial supports it in that population.

    Medical Disclaimer

    The information provided on this website is for educational and informational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition or before starting any supplement regimen.

    Individual results may vary. The statements on this website have not been evaluated by the Food and Drug Administration. Products and information are not intended to diagnose, treat, cure, or prevent any disease.