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The short answer: black cohosh is generally well tolerated for short-term use, and most reported side effects are mild, such as stomach upset, headache or rash. The bigger question is the liver: there have been rare reports of liver injury in people taking it. So if you have a liver condition, a hormone-sensitive condition, take medication, or are pregnant, talk to your doctor before using it.
Black cohosh is the botanical you'll see most often in menopause supplements (we cover the others in our ingredient-by-ingredient guide to perimenopause supplements). Because it's so common, it gets a lot of questions. Here are honest answers.
What is black cohosh?
Black cohosh (Actaea racemosa, also called Cimicifuga racemosa) is a flowering plant native to eastern North America. Its root and rhizome have been used traditionally for women's health for generations, and today it's included in many supplements for menopause support.
One thing to know up front: black cohosh is not the same as blue cohosh. They share a name but are different plants, and blue cohosh carries its own safety concerns. Always check the label.
Common side effects
In studies and reports, the side effects people mention most are usually mild:
- Upset stomach or indigestion
- Headache
- Rash
- A feeling of heaviness
- Light vaginal spotting or bleeding
- Weight changes
Taking black cohosh with food may help with stomach upset. Any unexpected vaginal bleeding after menopause should always be checked by a doctor, whether or not you take a supplement.
The liver question
This is the side effect that matters most, so we want to be straightforward about it.
There have been rare case reports of liver problems, including hepatitis and liver failure, in people who took black cohosh products. Researchers haven't proven that black cohosh itself caused these cases. Some may have involved other ingredients or products that weren't really black cohosh. Still, the reports were serious enough that several health authorities recommend a caution on product labels.
Stop taking it and call your doctor if you notice signs of a liver problem:
- Unusual tiredness or weakness
- Loss of appetite, nausea or pain in the upper right side of your stomach
- Dark urine
- Yellowing of the skin or the whites of the eyes (jaundice)
If you already have a liver condition, or regularly drink alcohol or take medications that affect the liver, check with your doctor before taking black cohosh at all.
Who should avoid black cohosh, or ask a doctor first
Talk to your doctor or pharmacist before taking black cohosh if you:
- Are pregnant, could be pregnant, or are breastfeeding. Black cohosh isn't recommended during pregnancy.
- Have, or have had, a hormone-sensitive condition, such as certain breast, uterine or ovarian conditions, or endometriosis. It's still not fully clear how black cohosh interacts with hormone pathways.
- Have a liver condition (see above).
- Take prescription medication, including hormone therapy or any medication processed by the liver.
- Have surgery coming up. Tell your surgical team about every supplement you take.
How long can you take black cohosh?
Most studies of black cohosh have lasted 12 months or less, so there's limited information about longer use. If you plan to take it as part of your routine for more than a few months, it's worth checking in with your doctor along the way.
Does black cohosh work for menopause?
The research is mixed. Some studies have found encouraging results and others haven't, partly because studies have used different products, doses and lengths of time. Many women still choose it as one part of a daily routine for this stage of life. What helps most is setting realistic expectations and keeping your doctor in the loop.
How to choose a quality black cohosh supplement
Because some of the problems linked to black cohosh may come from mislabeled or contaminated products, quality matters. Look for:
- The scientific name on the label: Actaea racemosa or Cimicifuga racemosa. Some products have been found to contain related Asian species instead.
- A standardized extract. Many quality products are standardized to 2.5% triterpene glycosides, which helps keep each dose consistent.
- A full, clear ingredient list, so you can check for overlap with anything else you take.
- Modest claims. Skip any product that promises to cure or treat menopause, or guarantees results by a certain date.
- Clear safety guidance on who shouldn't take it.
Where black cohosh fits in PumPums Menopause Relief
PumPums Menopause Relief uses black cohosh standardized to 2.5% triterpene glycosides, together with red clover extract, maca root, magnesium glycinate, vitamin D3 and omega-3s, in two daily capsules. Everything in this article applies to it too: if any of the points above describe you, please talk to your doctor before you start. Read what's in PumPums Menopause Relief for the full formula, and red clover for menopause for its companion botanical.
For more on supporting your body through this season, read menopause and sleep and everyday wellness habits for menopause.
Frequently asked questions
What are the side effects of black cohosh?
The most commonly reported side effects are mild: upset stomach, headache, rash, a feeling of heaviness, light spotting and weight changes. Rare cases of liver problems have also been reported, so stop taking it and call your doctor if you notice dark urine, yellowing skin or eyes, or unusual tiredness.
Is black cohosh bad for your liver?
Most people who take black cohosh don't have liver problems, but rare cases of liver injury have been reported. It hasn't been proven that black cohosh caused them. If you have a liver condition, drink alcohol regularly, or take medication that affects the liver, check with your doctor before using it.
Who should not take black cohosh?
Black cohosh isn't recommended during pregnancy or breastfeeding. Anyone with a hormone-sensitive condition, a liver condition, upcoming surgery, or who takes prescription medication should talk to a doctor before using it.
How long does it take for black cohosh to work?
Everyone's body is different, and there's no guaranteed timeframe. Most studies have looked at use over several weeks to 12 months. Talk to your doctor about what to expect and how long to continue.
Is black cohosh the same as blue cohosh?
No. They're different plants with different safety profiles. Always check that the label says black cohosh (Actaea racemosa or Cimicifuga racemosa).
This article is for general education and is not medical advice. Always talk to your doctor before starting a new supplement, especially if you have a health condition or take medication.
*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.
