Is Black cohosh FDA-approved?

Black cohosh is regulated as a dietary supplement in the US, not as a drug. The FDA does not verify efficacy claims on supplement labels, and product potency varies by brand. Discuss any supplement with a qualified clinician before starting.

Does Black cohosh help with hot flashes?

Speak to a clinician before starting Black cohosh if you are pregnant, breastfeeding, taking prescription medication (especially Hepatotoxic medications), or living with a chronic condition. Overall, our editorial synthesis rates the evidence as "moderate evidence" — it is not a substitute for medical care.

Black cohosh is regulated as a dietary supplement in the US, not as a drug. The FDA does not verify efficacy claims on supplement labels, and product potency varies by brand. Discuss any supplement with a qualified clinician before starting.

Editorial evidence review

Black cohosh for hot flashes and vasomotor symptoms: what the evidence shows

Also known as: Actaea racemosa, Cimicifuga racemosa, Remifemin (branded extract)

Evidence grade

Moderate evidence

Randomized trials and pooled analyses suggest standardized black-cohosh extracts modestly reduce hot-flash frequency and severity versus placebo over 12 weeks, with effect sizes smaller than hormone therapy. The Menopause Society considers evidence inconsistent but non-hormonal, and generally does not recommend it as first-line vasomotor treatment.

What is Black cohosh?

Black cohosh (Actaea racemosa) is a dietary supplement commonly marketed for hot flashes, night sweats, vasomotor symptoms. In the US it is regulated as a food, not a drug, so the FDA does not verify label claims or potency. This page summarizes what peer-reviewed research suggests about Black cohosh and how clinicians typically weigh it against evidence-based prescription options.

Evidence for menopause and hormonal-health uses

Researchers have studied Black cohosh for several symptom clusters relevant to women in perimenopause and midlife. The strongest evidence, where it exists, is summarized below — framed as what studies suggest rather than as clinical guarantees.

hot flashes: studies suggest a modest, variable effect — some trials show benefit versus placebo, others do not.
night sweats: studies suggest a modest, variable effect — some trials show benefit versus placebo, others do not.
vasomotor symptoms: studies suggest a modest, variable effect — some trials show benefit versus placebo, others do not.
mood: studies suggest a modest, variable effect — some trials show benefit versus placebo, others do not.

Typical dosing

Trials most commonly use 20–40 mg/day of a standardized extract (e.g. Remifemin), taken for 8–12 weeks. Use beyond 6 months has limited safety data.

Dosing above is what studies commonly use — it is not a personal medical recommendation.

Side effects and interactions

Common side effects

Gastrointestinal upset
Headache and dizziness
Rash
Rare hepatotoxicity reports — discontinue if jaundice, dark urine, or abdominal pain develops

Known interactions

Hepatotoxic medications — additive liver-injury risk
Tamoxifen — data mixed on interaction; discuss with oncologist
Anticoagulants — theoretical bleeding risk

Who should avoid Black cohosh

Speak to a qualified clinician before starting Black cohosh if you are pregnant, planning pregnancy, breastfeeding, taking prescription medication, or living with a hormone-sensitive condition, kidney or liver disease, a bleeding disorder, or a thyroid condition. Supplement quality varies by manufacturer, so avoid products that do not disclose third-party testing.

Evidence-based alternatives and clinician-guided options

If you are considering Black cohosh for perimenopause or midlife hormonal symptoms, a clinician can help weigh it against options with a stronger evidence base — including hormone therapy, non-hormonal prescriptions, and lifestyle interventions. Our editorial reviews cover telehealth providers that can prescribe and monitor these options:

Read our alloy review — Alloy offers FDA-approved HRT and non-hormonal Rx (e.g. fezolinetant) with stronger vasomotor evidence.
Read our midi health review — Midi Health clinicians assess non-hormonal options during menopause visits.

Weighing costs matters too — our HRT cost estimator compares typical monthly out-of-pocket costs across HRT, non-hormonal Rx, and supplement-only strategies.

Frequently asked questions

Does Black cohosh help with hot flashes?: Randomized trials and pooled analyses suggest standardized black-cohosh extracts modestly reduce hot-flash frequency and severity versus placebo over 12 weeks, with effect sizes smaller than hormone therapy. The Menopause Society considers evidence inconsistent but non-hormonal, and generally does not recommend it as first-line vasomotor treatment.
What is a typical dose of Black cohosh?: Trials most commonly use 20–40 mg/day of a standardized extract (e.g. Remifemin), taken for 8–12 weeks. Use beyond 6 months has limited safety data.
Who should avoid Black cohosh?: Speak to a clinician before starting Black cohosh if you are pregnant, breastfeeding, taking prescription medication (especially Hepatotoxic medications), or living with a chronic condition. Overall, our editorial synthesis rates the evidence as "moderate evidence" — it is not a substitute for medical care.
Is Black cohosh FDA-approved?: Black cohosh is regulated as a dietary supplement in the US, not as a drug. The FDA does not verify efficacy claims on supplement labels, and product potency varies by brand. Discuss any supplement with a qualified clinician before starting.