Index of Herbs

Concern guide

Herbs for Period Pain and PMS

Herbs that may ease period cramps and PMS, from chasteberry to chamomile, with what the research shows.

7 herbs reviewed

Updated October 7, 2026

Period pain is one of the most common health complaints there is. Cramping in the lower belly, sometimes spreading to the back or thighs, usually starts just before or at the start of a period and eases over a day or two. It is driven largely by prostaglandins, natural chemicals that make the muscle of the uterus contract. Premenstrual syndrome (PMS) arrives earlier, in the week or two before a period, with some mix of irritability, low mood, tiredness, bloating, headaches, and tender breasts that lifts once bleeding begins. A small number of people have a severe form called premenstrual dysphoric disorder (PMDD), which deserves its own care.

Herbs can be a gentle part of a plan for both. For cramps, the usual first step is an anti-inflammatory painkiller (NSAID) such as ibuprofen or naproxen, taken at the first sign of pain, along with heat, movement, and rest; hormonal birth control is another option for ongoing pain. For PMS, regular exercise, steady meals, less caffeine and alcohol, and calcium-rich foods can all help, and ACOG notes that SSRI antidepressants help many people with PMDD. A herb can sit comfortably alongside these, and keeping a simple symptom diary for two or three cycles makes it easier to tell what is working.

The herbs below are ordered by strength of evidence for period pain or PMS, then by how commonly they are used. Ratings run from good clinical evidence to long traditional use, and here the best-supported herbs currently sit at promising: chasteberry is the only one with an EU well-established use for PMS, and ginger has the most trials for cramps. Research on herbs for periods is still emerging, with mostly small trials in young women, and a 2016 Cochrane review judged that several supplements show encouraging early results that justify more research. The full monographs cover doses, side effects, and interactions.

02 The shortlist

The herbs, from best studied to time-honored

How to read the ratings

  • Good clinical evidence
  • Promising clinical evidence
  • Early or mixed evidence
  • Long traditional use

Ratings show how much research backs each herb for this particular concern. Every herb links to its full monograph, with preparations, safety notes, and sources.

  1. 01 Chasteberry

    Promising clinical evidence

    Vitex agnus-castus

    Chasteberry is the best-known herb for PMS, and one specific fruit extract, taken at 20 mg a day, has EU well-established use for it. In the key trial of 170 women, half or more of their PMS symptoms, such as irritability, mood changes, and breast fullness, eased in 52% of those on chasteberry versus 24% on placebo over three cycles. Trials vary in quality, so a named fruit extract taken daily for three months is the fair test. It is not for pregnancy or breastfeeding.

    Read the chasteberry monograph →

  2. 02 Ginger

    Promising clinical evidence

    Zingiber officinale

    Ginger is a kitchen favorite that many people reach for when cramps start. NCCIH says ginger supplements might help reduce the severity of menstrual cramps, and a 2024 meta-analysis found ginger eased period pain more than placebo and about as well as NSAID painkillers in the trials that compared them. Studies are small and vary in quality, so larger trials would help. Heartburn is the most common side effect, and anyone taking anticoagulants should check with a prescriber before using capsules.

    Read the ginger monograph →

  3. 03 St. John’s Wort

    Early or mixed evidence

    Hypericum perforatum

    St. John’s wort is accepted in Europe as a medicine for mild to moderate depression, so some people try it for the low mood and irritability of PMS. Studies in PMS have not yet clearly shown a benefit, so research here is still emerging. The key caution is serious: it speeds the breakdown of many medicines and can make the pill and other hormonal contraception less reliable, so backup contraception is advised. It should never be combined with SSRIs, which are often prescribed for severe PMS.

    Read the st. john’s wort monograph →

  4. 04 Valerian

    Early or mixed evidence

    Valeriana officinalis

    Valerian is a calming root best known for sleep, and EMA accepts specific extracts for mild nervous tension. For period pain, one trial of 100 women found valerian eased cramps more than placebo, and the 2016 Cochrane review counted it among supplements with limited but encouraging evidence, while NCCIH says there is not yet enough research for PMS or cramps. It can cause drowsiness, adds to the effects of alcohol and sedatives, and is not recommended in pregnancy or breastfeeding.

    Read the valerian monograph →

  5. 05 Yarrow

    Early or mixed evidence

    Achillea millefolium

    Yarrow is a traditional European herb that EMA accepts as a traditional remedy for minor menstrual cramps, usually taken as a tea. In a trial of 96 students with period pain, yarrow flower tea taken for the first three days of two cycles eased pain more than a placebo tea, with no side effects reported. It is one small study at a higher dose than EMA’s, so larger trials would help. Avoid yarrow with daisy-family allergy, in pregnancy, and under age 12.

    Read the yarrow monograph →

  6. 06 Fenugreek

    Early or mixed evidence

    Trigonella foenum-graecum

    Fenugreek is a familiar seed spice that some women use for period cramps. In one trial of 101 women it eased cramp pain more than placebo, and the 2016 Cochrane review listed it among supplements worth further study, though NCCIH calls the evidence low quality and uncertain. The key caution matters for anyone who could become pregnant: fenugreek supplements have been linked to birth defects, and EMA does not recommend medicinal doses for women not using contraception. Avoid it with peanut or legume allergy.

    Read the fenugreek monograph →

  7. 07 Chamomile

    Long traditional use

    Matricaria chamomilla

    Chamomile tea is a soothing, familiar cup that many people sip during their period, and EMA accepts chamomile flower as a traditional remedy for minor digestive spasms and bloating. A few small trials have looked at period pain and PMS, but the research is still early, so its reputation here rests mainly on tradition and comfort. The main caution is allergy in people sensitive to ragweed or other daisy-family plants, and anyone taking warfarin should mention regular use to their prescriber.

    Read the chamomile monograph →

03 Caution

Using these herbs safely

Period pain and PMS are common and usually manageable, but some symptoms need prompt medical care. Very heavy bleeding, such as soaking through a pad or tampon every hour for several hours in a row, passing clots the size of a quarter or larger, or bleeding for more than seven days, deserves a doctor’s visit, and heavy bleeding with dizziness, fainting, or a racing heart needs urgent care. Pain that stops you from doing your usual daily activities, is not eased by ordinary painkillers, or gets worse over time can be a sign of endometriosis, fibroids, or adenomyosis, all of which have effective treatments. Pelvic pain with fever or unusual vaginal discharge may mean an infection, and bleeding between periods or after sex should always be checked. If there is any chance of pregnancy, severe one-sided pain or bleeding when a period is late needs same-day care, because it can signal an ectopic pregnancy or miscarriage. PMS that disrupts work, relationships, or daily life may be PMDD, which responds well to treatment, so it is worth raising with a clinician. Anyone having thoughts of suicide or self-harm should contact emergency services or a crisis line right away; in the US, call or text 988, the Suicide & Crisis Lifeline, and in a life-threatening situation call 911.

St. John’s wort has the longest interaction list of any herb here. It speeds the breakdown of many medicines, and in one study women taking it alongside a combined pill had more breakthrough bleeding, a sign of reduced contraceptive protection; EMA advises additional contraception, and the same concern applies to implants and other hormonal methods. It also lowers levels of warfarin, cyclosporine, some HIV and cancer drugs, some antiseizure medicines, and statins, and it can cause serotonin toxicity with SSRIs, SNRIs, and triptans used for menstrual migraine. Chasteberry may interact with hormonal contraception, hormone therapy, and tamoxifen, and with dopamine-related drugs such as bromocriptine, Parkinson’s medicines, and antipsychotics; anyone undergoing IVF or ovulation induction should use it only with their clinic’s agreement. For people taking anticoagulants such as warfarin, high-dose ginger, fenugreek, and chamomile may add to bleeding risk, and NSAIDs used for cramps do too, so a pharmacist can help check combinations. Fenugreek can also lower blood sugar with diabetes medicines, and valerian adds to the drowsiness from alcohol and sedatives. Never stop or swap a prescribed medicine for a herb without talking with the prescriber.

Pregnancy and breastfeeding: if there is any chance of pregnancy, take a test before starting a herb for period symptoms. EMA does not recommend chasteberry, valerian, or yarrow in pregnancy or breastfeeding, and chasteberry may reduce milk supply. St. John’s wort is not advised in pregnancy, and breastfed babies of mothers taking it have had colic and drowsiness. Fenugreek supplements are not safe in pregnancy and are not recommended while breastfeeding, and EMA prefers to avoid medicinal ginger in pregnancy, although cooking with ginger is fine. Teens often have the most painful periods, and many of these products are not meant for them: chasteberry and medicinal fenugreek are not recommended under 18, St. John’s wort is not recommended for depression under 18, and yarrow and valerian are not recommended under 12. Severe period pain in a teenager deserves a doctor’s visit rather than a supplement alone.

Product quality varies, so it pays to choose carefully. Chasteberry products differ in plant part and extract, so look for one that names the fruit and its extract, and give it three cycles. St. John’s wort extracts differ in hyperforin, the constituent behind most interactions, and most mood capsules are not the low-hyperforin type. Chamomile and yarrow are daisy-family plants that can trigger allergy, fenugreek can cross-react with peanut and other legumes, and valerian has very rare reports of liver injury, mostly with combination products. Chasteberry is best avoided without medical advice by people with a pituitary condition or a history of estrogen-sensitive cancer. Women’s blends sometimes add black cohosh, which is studied for menopause rather than periods and has been linked to rare liver injury, so check every ingredient on the label.

04 Questions

Frequently Asked Questions

For PMS, chasteberry has the strongest support: one specific fruit extract has EU well-established use, and in its key trial 52% of women had their symptoms at least halved, versus 24% on placebo. For cramps, ginger has the most trials, with a 2024 meta-analysis finding it eased pain more than placebo and about as well as NSAID painkillers. Yarrow tea is a traditional European remedy for minor cramps with one encouraging trial. NSAIDs such as ibuprofen remain the usual first step for cramps, and a herb can sit alongside them.

Give it about three months. Trials of chasteberry measured results after three menstrual cycles of daily use, and EMA recommends continued use over three months for the best effect, rather than taking it only in the days before a period. If symptoms have not improved after three months, or are getting worse, see a doctor, and EMA advises not taking it for more than three months without medical advice. A daily symptom diary helps you and your clinician judge whether it is helping.

Check with your prescriber or pharmacist first. St. John’s wort speeds the breakdown of contraceptive hormones, and in one study women on a combined pill had more breakthrough bleeding while taking it; EMA advises using additional contraception, and the same concern applies to implants and other hormonal methods. With chasteberry, interactions with hormonal contraception cannot be ruled out: no contraceptive failures have been proven, but the question has not been properly studied.

Evening primrose oil is a popular choice for PMS and cyclical breast pain, and it is generally gentle, with mild stomach upset the most common side effect. So far, though, trials have not shown it helps more than placebo: an older systematic review found little benefit for PMS, and a 2021 analysis of 13 trials found it no better than placebo for breast pain. It may add to bleeding risk with anticoagulants. A new breast lump, or pain on one side that does not follow your cycle, needs a doctor’s check.

See a doctor if your pain stops you from doing everyday things, is not helped by ordinary painkillers, or is getting worse over time, since this can be a sign of endometriosis or fibroids. Very heavy bleeding, such as soaking a pad or tampon every hour for several hours or passing clots the size of a quarter, also needs a check, as do bleeding between periods or after sex, and pain with fever or unusual discharge. Severe one-sided pain when pregnancy is possible needs same-day care. If PMS brings thoughts of suicide or self-harm, call or text 988 in the US right away.

05 References

Sources

These references support the claims in this guide. Each herb’s monograph carries its own full source list.

  1. Dysmenorrhea: Painful Periods

    American College of Obstetricians and Gynecologists, 2022

    Supports NSAIDs and hormonal birth control as usual treatments for cramps, and describes secondary period pain from endometriosis, fibroids, and adenomyosis that tends to worsen over time.

  2. Heavy Menstrual Bleeding

    American College of Obstetricians and Gynecologists, 2026

    Source for the signs of heavy bleeding, including soaking a pad or tampon every hour for several hours, clots the size of a quarter or larger, and bleeding beyond seven days.

  3. Premenstrual Syndrome (PMS)

    American College of Obstetricians and Gynecologists, 2025

    Supports the lifestyle and calcium advice for PMS, the description of PMDD, and the role of SSRI antidepressants in severe PMS and PMDD.

  4. European Union herbal monograph on Vitex agnus-castus L., fructus (Revision 1)

    European Medicines Agency (EMA/HMPC/606742/2017), 2018

    Basis for chasteberry’s well-established use for PMS at 20 mg daily, the three-month course, and its pregnancy, breastfeeding, hormone, and dopamine-drug cautions.

  5. Dietary supplements for dysmenorrhoea

    Cochrane Database of Systematic Reviews (PubMed 27000311), 2016

    The 27-trial review that found low-quality but encouraging evidence for ginger, fenugreek, and valerian for period pain and judged more research justified.

  6. Ginger for Pain Management in Primary Dysmenorrhea: A Systematic Review and Meta-Analysis

    Journal of Integrative and Complementary Medicine (PubMed 38770631), 2024

    Supports ginger’s rating: less period pain than placebo and no difference from NSAIDs in comparison trials, with limits from risk of bias.

  7. Effect of Achillea millefolium on relief of primary dysmenorrhea: a double-blind randomized clinical trial

    Journal of Pediatric and Adolescent Gynecology (PubMed 26238568), 2015

    The 96-student trial in which yarrow flower tea eased period pain more than a placebo tea over two cycles.

  8. The interaction between St John’s wort and an oral contraceptive

    Clinical Pharmacology and Therapeutics (PubMed 14663455), 2003

    Human study in which St. John’s wort increased contraceptive metabolism and breakthrough bleeding in women on a combined pill.

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