PMS gummies look like candy, but the ingredients inside are real supplements with real side effects and interactions. Here's what the research and NIH experts say about the most common ones, and who should check with a doctor first.
Written by Vita Globe Editorial Team | Reviewed against NIH guidance and peer-reviewed research
What are the side effects of PMS gummies?
It depends on the ingredients. Chasteberry is generally well tolerated short term; mild side effects can include nausea, stomach pain, diarrhea, headache or itching[1]. Dong quai can cause sun sensitivity and may raise bleeding risk with blood thinners[2]. Vitamin B6 is safe at typical doses, but very high intakes over time can cause nerve damage, so adults should stay under 100mg a day from all sources[3].
Caveat: Side-effect data for herbal supplements is thinner than for medications, and most comes from short studies. If something feels off, stop and talk to your doctor.
Sources: NCCIH: Chasteberry · MSK: Dong Quai · NIH ODS: Vitamin B6 · Verified 2026-09-28
IN THIS ARTICLE
What side effects can chasteberry cause?
Chasteberry (Vitex agnus-castus) is the herb most often found in PMS formulas. According to the NIH's National Center for Complementary and Integrative Health (NCCIH), it's generally well tolerated in the short term, and side effects are usually mild: nausea, stomach pain, diarrhea, headache or itching[1].
A systematic review of adverse events drew on clinical trials, post-marketing surveillance and spontaneous reports. It found that side effects were mild and reversible, most commonly nausea, headache, digestive upset, menstrual changes, acne, itching and rash[4].
Who should avoid it:
- Anyone who is pregnant or breastfeeding. NCCIH says chasteberry may be unsafe during this time[1].
- People with hormone-sensitive conditions, such as breast, uterine or ovarian cancer[1].
- People on hormonal birth control, unless their doctor okays it. The Office on Women's Health advises avoiding chasteberry with hormonal birth control[5].
- People taking dopamine-related medications. The adverse-events review flagged potential interactions with dopamine antagonists as a theoretical concern[4].
What about dong quai?
Dong quai (Angelica sinensis) has a long history in traditional Chinese herbal practice for menstrual complaints. Memorial Sloan Kettering's integrative medicine service lists possible reactions including sun sensitivity and skin reactions, appetite loss, bloating and diarrhea[2].
The bigger concern is interactions. Dong quai may increase the risk of bleeding when combined with blood thinners such as warfarin, and it should be avoided during pregnancy and breastfeeding[2]. People with hormone-sensitive cancers should talk with their doctor before using it[2]. Read more in Dong Quai: What the Research Actually Shows.
Can vitamin B6 cause side effects?
At the amounts found in most supplements, vitamin B6 is well tolerated. The concern is long-term high intake. The NIH Office of Dietary Supplements reports that taking 1 to 6 grams a day for a year or more can cause severe nerve damage (sensory neuropathy), which usually improves after stopping[3].
That's why there's a tolerable upper intake level: 100mg a day for adults and 80mg a day for teens aged 14 to 18, counting all sources[3]. The practical risk is stacking. If you take a PMS supplement, a B-complex, an energy drink and a multivitamin, the B6 can add up faster than you'd think.
B6 can also interact with some medications, including certain antiepileptic drugs and the antibiotic cycloserine[3].
Cranberry, sugar and the gummy itself
Cranberry taken by mouth is generally considered safe, though very large amounts can cause stomach upset and diarrhea. NCCIH notes conflicting evidence on whether cranberry interacts with warfarin, so check with your doctor if you take it[6].
The gummy base matters too. Gummies usually contain some added sugar, which is worth counting if you take more than one gummy supplement. And because they taste like candy, keep them out of reach of children.
The honest summary
- Most people tolerate common PMS gummy ingredients well; side effects are usually mild and digestive.
- The real risks are interactions (birth control, blood thinners, dopamine-related drugs) and use during pregnancy or breastfeeding.
- Keep total vitamin B6 under 100mg a day, and stop and call your doctor if you notice anything unusual.
Who should check with a doctor first?
| If you… | Why it matters |
|---|---|
| Are pregnant or breastfeeding | Chasteberry and dong quai may be unsafe[1][2] |
| Use hormonal birth control | Chasteberry isn't advised alongside it[5] |
| Take warfarin or another blood thinner | Dong quai may raise bleeding risk[2] |
| Have a hormone-sensitive condition | Chasteberry may not be safe[1] |
| Take several B-vitamin products | Total B6 should stay under 100mg a day[3] |
| Are under 18 | Teens have a lower B6 upper limit[3], and a pediatrician should guide any supplement use |
Our option
Vita Globe Her PMS Gummies
Her PMS Gummies list their amounts clearly: 20mg of vitamin B6, well under the 100mg adult upper limit, plus a 111mg PMS Support Blend of chasteberry, cranberry and dong quai and 100mcg of black pepper extract per two-gummy serving. Each serving has 20 calories and 5g of added sugar. They're made to help ease occasional premenstrual moodiness and tension.* For adults only; not for use during pregnancy or nursing, and talk to your doctor first if you use hormonal birth control or blood thinners.
KEEP READING
Chasteberry (Vitex) for PMS · Vitamin B6 for PMS · What's Actually Inside: Her PMS Gummies
Frequently asked questions
Can PMS supplements mess with your period?
Possibly. Menstrual changes are among the side effects reported with chasteberry[4]. If your cycle changes noticeably, stop and talk to your doctor.
Can chasteberry cause acne?
Acne has been reported, along with itching and rash. In a review of safety data, reported side effects were generally mild and reversible[4].
Is it safe to take PMS gummies with birth control?
Check with your doctor. The Office on Women's Health advises avoiding chasteberry if you use hormonal birth control[5].
How much vitamin B6 is too much?
The upper limit for adults is 100mg a day from all sources, and 80mg for teens 14 to 18[3].
Should I stop PMS supplements before surgery?
Tell your surgeon about every supplement you take. Dong quai may increase bleeding risk[2], so your care team may ask you to pause it.
Sources
- National Center for Complementary and Integrative Health. Chasteberry. NCCIH. Updated April 2025. nccih.nih.gov/health/chasteberry
- Memorial Sloan Kettering Cancer Center, Integrative Medicine. Dong Quai. mskcc.org. mskcc.org/…/herbs/dong-quai
- National Institutes of Health, Office of Dietary Supplements. Vitamin B6 — Fact Sheet for Health Professionals. NIH ODS. ods.od.nih.gov/factsheets/VitaminB6-HealthProfessional
- Daniele C, Thompson Coon J, Pittler MH, Ernst E. Vitex agnus castus: a systematic review of adverse events. Drug Saf. 2005;28(4):319–332. doi:10.2165/00002018-200528040-00004
- U.S. Department of Health and Human Services, Office on Women's Health. Premenstrual syndrome (PMS). womenshealth.gov. womenshealth.gov/menstrual-cycle/premenstrual-syndrome
- National Center for Complementary and Integrative Health. Cranberry. NCCIH. nccih.nih.gov/health/cranberry
About the Vita Globe Editorial Team
The Vita Globe Editorial Team researches and writes our wellness content, working from peer-reviewed research, systematic reviews and guidance from bodies such as the NIH and the FDA. We cite our sources inline and update articles when the evidence changes.
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. This article is for informational purposes only and is not a substitute for medical advice. Talk to your healthcare provider before starting any new supplement, particularly if you are pregnant, nursing, taking medication, or caring for a child.
