Peony + Etonogestrel, Ethinyl Estradiol
Etonogestrel, Ethinyl Estradiol brand name: NuvaRing.
Etonogestrel, Ethinyl Estradiol falls into 4 drug categories that Peony can interact with; the most serious is rated moderate. Theoretically, use of peony may increase the levels and clinical effects of drugs metabolized by CYP1A2.
Read the full interaction reportPeony and Etonogestrel, Ethinyl Estradiol
These two interact in 4 distinct ways. Each one is explained separately below.
Why Are There 4 Interactions?
Peony interacts with whole categories of medication. Etonogestrel, Ethinyl Estradiol falls into 4 of those categories, so it can interact with Peony in 4 different ways. We’ve listed each one below — your overall risk is driven by the most serious of them (Moderate).
CYTOCHROME P450 1A2 (CYP1A2) SUBSTRATES
1 of 4Why this applies to Etonogestrel, Ethinyl Estradiol
Etonogestrel, Ethinyl Estradiol falls under CYTOCHROME P450 1A2 (CYP1A2) SUBSTRATES — the group Peony interacts with.
In vitro research shows that peony suppresses the metabolism of clozapine via weak-to-moderate inhibitory effects on CYP1A2 and CYP3A4. This effect has not been reported in humans.
Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists.
If you're using the NuvaRing (which slowly releases etonogestrel and ethinyl estradiol) and thinking about peony, here's the simple picture. In test-tube studies, peony seems to gently slow down a liver enzyme called CYP1A2, which helps process the estrogen part of your ring. In theory, that could let estrogen levels creep up a little, which might mean more of the usual estrogen-related effects like nausea, breast tenderness, headaches, or bloating.
The honest truth is that this is only based on lab research, not real people, so it's a weak, theoretical concern. These hormones are active drugs (not prodrugs), so the ring should still work for birth control. Food amounts aren't really a worry. Still, before starting a concentrated peony supplement, run it by your pharmacist or doctor.
- Wang W, Tian DD, Zheng B, et al. Peony-glycyrrhiza decoction, an herbal preparation, inhibits clozapine metabolism via cytochrome P450s, but not flavin-containing monooxygenase in in vitro models. Drug Metab Dispos 2015;43(7):1147-53. PubMed
ESTROGENS
2 of 4Etonogestrel, Ethinyl Estradiol also falls under ESTROGENS.
In vitro and animal research shows that peony extract has estrogenic activity. Theoretically, peony might compete for estrogen receptors and/or cause additive estrogenic effects.
Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists.
Your NuvaRing slowly releases two hormones, a progestin (etonogestrel) and an estrogen (ethinyl estradiol). The concern here is purely theoretical: in lab and animal studies, peony root seems to act a little like estrogen and may attach to the same receptors your body's estrogen uses. On paper, that could either add to estrogen effects or compete with them. There is no good human research showing this actually happens with birth control.
If anything did occur, you might notice more estrogen-type effects like breast tenderness, nausea, bloating, or breakthrough bleeding. Honestly, small amounts in a tea or food blend are unlikely to matter. If you want to use concentrated peony supplements regularly, just check with your pharmacist or doctor first.
- Xu Y, Li X, Chen T, et al. Radix Paeoniae Alba increases serum estrogen level and up-regulates estrogen receptor expression in uterus and vagina of immature/ovariectomized mice. Phytother Res. 2019;33(1):117-29. [RETRACTED].
CONTRACEPTIVE DRUGS
3 of 4Etonogestrel, Ethinyl Estradiol also falls under CONTRACEPTIVE DRUGS.
In vitro and animal research shows that peony extract has estrogenic activity. Concomitant use might also increase the risk for estrogen-related adverse effects.
Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists.
Here's the short version on combining peony root with your NuvaRing (which delivers etonogestrel and ethinyl estradiol). In lab dishes and animal studies, peony has shown mild estrogen-like activity. The theory is that peony could compete at estrogen receptors and might also add to estrogen-related effects. This is purely theoretical, graded as weak evidence, so I don't want you to panic.
If anything were to happen, you'd want to watch for the usual estrogen-related complaints like breast tenderness, nausea, bloating, headaches, or mood changes. There's no solid proof it weakens your birth control's protection, but since we can't rule it out, I'd loop in your pharmacist or doctor before starting peony rather than guessing.
- Xu Y, Li X, Chen T, et al. Radix Paeoniae Alba increases serum estrogen level and up-regulates estrogen receptor expression in uterus and vagina of immature/ovariectomized mice. Phytother Res. 2019;33(1):117-29. [RETRACTED].
CYTOCHROME P450 3A4 (CYP3A4) SUBSTRATES
4 of 4Etonogestrel, Ethinyl Estradiol also falls under CYTOCHROME P450 3A4 (CYP3A4) SUBSTRATES.
In vitro research shows that peony suppresses the metabolism of clozapine via weak-to-moderate inhibitory effects on CYP1A2 and CYP3A4. This effect has not been reported in humans.
Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists.
If you're using the NuvaRing (etonogestrel with ethinyl estradiol), here's the gist: your body relies on a liver enzyme called CYP3A4 to clear these hormones. Lab studies suggest peony root may gently slow that enzyme down. In theory, that could let hormone levels drift a little higher, which might mean more of the usual estrogen-type side effects like nausea, breast tenderness, headaches, or breakthrough spotting.
I want to be honest about how soft this is. The evidence comes only from test-tube and animal work, and it has never been shown to matter in real people. The hormones in NuvaRing are also dosed quite low. Still, it's worth a quick chat with your pharmacist or doctor before adding peony, just so someone who knows your history can weigh in.
- Wang W, Tian DD, Zheng B, et al. Peony-glycyrrhiza decoction, an herbal preparation, inhibits clozapine metabolism via cytochrome P450s, but not flavin-containing monooxygenase in in vitro models. Drug Metab Dispos 2015;43(7):1147-53. PubMed
What These Ratings Mean
Every interaction above is graded three ways — here’s the key to each label.
Clinically significant. Avoid the combination, or use only under close professional supervision.
Usually worth avoiding or managing — may need monitoring, a dose change, or timing apart.
Generally not serious. Be aware of it and mention it to your pharmacist.
- LikelyWell-controlled human studies have demonstrated the likely existence of this interaction.
- ProbableInteraction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
- PossibleInteraction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists.
- UnlikelyInteraction has been demonstrated in animal or in lab research but has been shown not to occur in humans.
- AHigh-quality meta-analysis (quantitative systematic review).
- BCase-control study.
- CConsensus.
- DAnecdotal evidence.
These ratings are for information only. Never start, stop, or otherwise change your therapy before speaking with your provider.
Peony Also Interacts With Other Medications
Peony has 810 moderate known drug interactions in our database — the Etonogestrel, Ethinyl Estradiol one above is among them. If you take anything else, check it against the full list below.
Check Another of Your Medications Against Peony
We haven’t checked that one against Peony yet — ask our pharmacists directly.
Covers the 2,830 medications we’ve checked against Peony. Pick one to open its full report.
See Every Supplement That Interacts With Etonogestrel, Ethinyl Estradiol
This page covers Peony only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Etonogestrel, Ethinyl Estradiol page lists 203 supplements it has a documented interaction with, worst first, each one explained.
The most serious there right now: Grapefruit (major), St. John's Wort (major), Acacia Rigidula (moderate), Activated Charcoal (moderate) and Adrafinil (moderate).
By severity: 2 major · 168 moderate · 33 minor.
From our pharmacist’s overview on the Etonogestrel, Ethinyl Estradiol page
“St. John's wort belongs at the top of any conversation about NuvaRing (etonogestrel and ethinyl estradiol) and supplements.”
Reviewed by 2 · Jul 18, 2026
Taking Peony as Part of a Dietary Supplement Product? Check It for Interactions
We hold 71 real supplement products containing Peony, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Peony. Your product may carry other ingredients that interact with Etonogestrel, Ethinyl Estradiol too, on top of Peony — and those would not show on this page. Find your product and we’ll check every ingredient on its label:
Where Peony and Etonogestrel, Ethinyl Estradiol Sit Against Everything Else
Out of every supplement and medication people look up on HelloPharmacist, here is where these two land this week — and which way each has been moving.
#213 of 1,452 supplements looked up here in the last 7 days
#790 of 2,830 medications looked up here in the last 7 days
Position among everything looked up on this site, not a measure of how commonly either one is used or how important it is. A supplement can climb this list because of a news story. It counts every request to the page, automated ones included, and nothing here identifies anyone.
About Peony
What is Peony?
- Menstrual cramps and irregular periods
- Muscle cramps and spasms
- Anxiety and stress
- Inflammation and pain
- Polycystic ovary syndrome (PCOS)
Peony root is a traditional Chinese medicine herb often used for menstrual problems, cramps, and inflammation, frequently as part of combination formulas. Human evidence for most uses is limited or preliminary, so it should not replace proven treatments. Talk to your pharmacist or doctor before using it, especially if you are pregnant, breastfeeding, or taking other medicines.
Other Drugs & Peony
Browse every other medication we’ve checked against Peony — both the ones with a known interaction and the ones without. Select any drug for the full detail.
No drugs match “”.
810 interactions
- Diclofenac Sodium ›
- Diltiazem ›
- Theophylline ›
- Nifedipine ›
- Ibuprofen ›
- Aspirin ›
- Hydrocortisone ›
- Naproxen ›
- Erythromycin ›
- Estradiol ›
- Minocycline ›
- Propranolol ›
- Lidocaine ›
- Norethindrone ›
- Testosterone ›
- Verapamil ›
- Levonorgestrel ›
- Prednisone ›
- Quinidine ›
- Cyclosporine ›
- Dexamethasone ›
- Triazolam ›
- Zopiclone ›
- Colchicine ›
- Fentanyl ›
- Oxybutynin ›
- Phenytoin ›
- Prednisolone ›
- Tacrolimus ›
- Temazepam ›
- Budesonide ›
- Carbamazepine ›
- Clindamycin ›
- Dextromethorphan ›
- Diclofenac Potassium ›
- Dipyridamole ›
- Doxorubicin ›
- Fluticasone ›
- Miconazole ›
- Acetaminophen ›
- Buprenorphine ›
- Conjugated Estrogens ›
- Diazepam ›
- Everolimus ›
- Ivabradine ›
- Ketoprofen ›
- Lofepramine ›
- Medroxyprogesterone ›
- Medroxyprogesterone Acetate ›
- Nortriptyline ›
- Rifampin ›
- Testosterone Undecanoate ›
- Aripiprazole ›
- Bendamustine ›
- Bivalirudin ›
- Caffeine (otc Drug) ›
- Ciclesonide ›
- Clonazepam ›
- Cyclobenzaprine ›
- Dapsone ›
Showing 60 of 810 moderate interactions — see all 810 on the Peony page.
No interaction 2,019 drugs checked — show the list
We also checked Peony against these medications and found no known interaction in our sources. Open any page to confirm.
- Levothyroxine ›
- Methylphenidate ›
- Ivermectin ›
- Metoprolol ›
- Rosuvastatin ›
- Escitalopram ›
- Docusate ›
- Hydroxyurea ›
- Valacyclovir ›
- Tirzepatide ›
- Methamphetamine ›
- Semaglutide ›
- Sumatriptan ›
- Lisdexamfetamine ›
- Metformin ›
- Lisinopril ›
- Amoxicillin ›
- Bupropion ›
- Acyclovir ›
- Methotrexate ›
- Doxycycline ›
- Fluoxetine ›
- Amphetamine ›
- Pregabalin ›
- Lamotrigine ›
- Azithromycin ›
- Gabapentin ›
- Isotretinoin ›
- Dextroamphetamine ›
- Methylene Blue ›
- Duloxetine ›
- Ciprofloxacin ›
- Bisoprolol ›
- Levothyroxine, Liothyronine ›
- Candesartan Cilexetil ›
- Cephalexin ›
- Cyclopentolate ›
- Acetaminophen, Dextromethorphan, Doxylamine ›
- Roxithromycin ›
- Mannitol ›
- Levetiracetam ›
- Pegunigalsidase Alfa-iwxj ›
- Ezetimibe ›
- Daptomycin ›
- Levothyroxine Sodium ›
- Dexmethylphenidate ›
- Mitomycin ›
- Amoxicillin, Clavulanate Potassium ›
- Valsartan ›
- Spironolactone ›
- Hexobarbitone ›
- Thyroid Hormone ›
- Phentermine, Topiramate ›
- Carbidopa, Levodopa ›
- Factor 7a ›
- Levodopa ›
- Minoxidil ›
- Hethylphenidate Hcl ›
- Cefaclor ›
- Venlafaxine ›
Showing the 60 most looked-up of 2,019 medications checked with no known interaction — see the full Peony list.
Sources & How We Checked
Interaction details are evidence-graded and sourced from the Natural Medicines database. The medication overview comes from MedlinePlus.
- Natural Medicines (Therapeutic Research Center) — Evidence-graded clinical reference for vitamins, herbs and supplements — the basis for our interaction data.
- MedlinePlus, U.S. National Library of Medicine — NIH consumer drug information, used for the medication overviews.
- NIH Dietary Supplement Label Database (DSLD) — Official supplement product labels.
Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.
Parts of this content are provided by the Therapeutic Research Center, LLC.
DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.
© 2021 Therapeutic Research Center, LLC
Etonogestrel, Ethinyl Estradiol Is Linked to Lower Levels of 7 Nutrients
Natural Medicines records Etonogestrel, Ethinyl Estradiol as a medicine that can lower these. This is not an interaction with Peony — it is a separate effect of the medicine, and it is a reason some people are advised to supplement rather than to avoid one:
Read the full Etonogestrel, Ethinyl Estradiol nutrient depletion report ›
Depletion records come from the licensed Natural Medicines database. Do not start a supplement on the strength of this page — ask your pharmacist or doctor whether it applies to you.
Taking Peony and Etonogestrel, Ethinyl Estradiol Together: Common Questions
Can you take Peony with Etonogestrel, Ethinyl Estradiol?
Why are there 4 interactions listed for Peony and Etonogestrel, Ethinyl Estradiol?
How serious is the Peony and Etonogestrel, Ethinyl Estradiol interaction?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
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This information is for education only and is not a substitute for professional medical advice. Always check with your pharmacist or doctor before starting, stopping, or combining supplements and medications.