Herb & supplement monograph

Chinese Prickly Ash Drug Interactions, Uses, Effectiveness, Safety & More

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS ·Updated June 2026

What is this page for?

First and foremost: how Chinese Prickly Ash interacts with medications. The heart of this page is the interaction list — every drug Chinese Prickly Ash is known to interact with, and how serious each one is.

But these pages have grown well beyond that into a full monograph — what Chinese Prickly Ash is, what people use it for and how strong the evidence is, its safety and side effects, and answers to the questions we’re asked most — written and reviewed by the clinical staff at HelloPharmacist. It’s educational information from our licensed clinical databases, not medical advice, and we don’t sell or endorse products. Our editorial policy

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Chinese Prickly Ash Drug Interactions: The Bottom Line

From the HelloPharmacist Editorial Team · Updated July 2026

Based on the available evidence, the overall risk of a clinically significant Chinese Prickly Ash drug interaction appears low for most people. None of the listed interactions are rated major, and every one traces back to a single theoretical concern that has not held up in human research.

Interactions deserving the most attention

The only interaction on record involves anticoagulant and antiplatelet drugs such as warfarin, aspirin, and clopidogrel. Lab research suggested Chinese Prickly Ash might make blood platelets less sticky, which in theory could add to the bleeding effect of these medicines. That said, this effect is graded as unlikely because it has not been shown to actually happen in people. Since blood thinners leave little margin for error, some caution with this combination is still reasonable.

What the rest of the list means

The long list of affected medications can look worrying, but it reflects one theoretical mechanism applied across an entire class of drugs, not many separate proven problems. In this case, the predicted bleeding effect has not produced meaningful changes in humans, so most people taking other types of medication have little reason for concern.

Check your medications against Chinese Prickly Ash

Based on HelloPharmacist’s Chinese Prickly Ash interaction data and reviewed under our editorial standards.

Interaction report

Drugs that interact with Chinese Prickly Ash

122 medications have a known interaction with Chinese Prickly Ash, graded by severity. Select any drug for the full evidence-based detail.

Don’t want to scroll the list? Just ask.

Tell us the medications you take and we’ll check each one against Chinese Prickly Ash using our pharmacist-reviewed interaction data.

AI summaries are generated from our Chinese Prickly Ash interaction data for education only — always confirm with your pharmacist. How we use AI

2,830 drugs

Read The List Like a Pharmacist

What Severity, Likelihood & Evidence Mean

Severity — How Serious It Can Be

Major. Clinically significant; generally best avoided, or used only under direct professional supervision.
Moderate. May need monitoring, a dose adjustment, or separating the times you take each one.
Minor. Generally not clinically significant, but still worth noting and mentioning to your pharmacist.
No known interaction. Checked against our sources with nothing documented — not the same as proven safety.

Likelihood — How Well It’s Documented

Likely. Well-controlled human studies have demonstrated the likely existence of this interaction
Probable. Interaction 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.
Possible. 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
Unlikely. Interaction has been demonstrated in animal or in lab research but has been shown not to occur in humans.

Where This Data Comes From

Interaction records are evidence-graded and sourced from the Natural Medicines database (TRC Healthcare), the same reference used by pharmacists and hospitals.
Each drug listed above links to the full report for that exact Chinese Prickly Ash combination — clinical detail, likelihood, evidence level, and citations.
Content is reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

The big picture

The kinds of drugs Chinese Prickly Ash affects

Every type of medication (drug category) Chinese Prickly Ash is known to interact with. Open any category for the detail — or search your exact drug in the checker above.

All 1 drug category Chinese Prickly Ash interacts with

Anticoagulant/antiplatelet Drugs

Anticoagulant/Antiplatelet Drugs

Chinese prickly ash might inhibit platelet aggregation. Theoretically, combining Chinese prickly ash with anticoagulant or antiplatelet drugs might increase the risk of bleeding; avoid concomitant use. Some of these drugs include aspirin, clopidogrel (Plavix), dalteparin (Fragmin), enoxaparin (Lovenox), heparin, ticlopidine (Ticlid), warfarin (Coumadin), and others.

Likelihood Unlikely Evidence D

Monograph

Chinese Prickly Ash: Uses, Safety & Side Effects

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS · Reviewed June 2026 ·

The bottom line

Chinese Prickly Ash is the fruit husk of Zanthoxylum bungeanum, best known as the Sichuan pepper that creates a tingling, numbing sensation on the tongue. It is widely used in cooking and traditional Chinese medicine for digestive complaints and pain, but strong human evidence for medicinal benefits is limited. Use culinary amounts safely, but talk to a pharmacist or doctor before using concentrated extracts.

Scientific name: Zanthoxylum bungeanum
Family: Rutaceae
Part used: Dried fruit husks (pericarp), and sometimes the seeds and essential oil
Common forms: Dried whole spice (Sichuan pepper), ground powder, essential oil, decoctions, and capsules

People commonly use it for

Digestive upset and stomach pain
Toothache and oral numbing
Antimicrobial and antiparasitic use
Cooking spice (Sichuan pepper)
Mild pain relief

Popular and traditional uses — not proof it works. See “Uses & effectiveness” below for the evidence.

Safety at a glance

OverallUse caution

Generally safe as a food spice, but medicinal-strength extracts are not well studied in people.

PregnancyBest avoided

Avoid medicinal amounts during pregnancy because safety has not been established.

BreastfeedingBest avoided

Avoid medicinal use while breastfeeding due to a lack of safety data.

Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Jump to a section

Overview

Chinese Prickly Ash comes from the dried fruit husks of Zanthoxylum bungeanum, a thorny shrub or small tree in the citrus family. It grows widely across China and other parts of East Asia. The reddish-brown husks are the source of the well-known spice often called Sichuan pepper or Sichuan peppercorn.

The spice is famous for the unique tingling, numbing, slightly buzzing feeling it leaves on the lips and tongue. In addition to its role in cooking, it has a long history in traditional Chinese medicine, where it is used for stomach complaints, pain, and as a warming remedy.

Today people use it as a cooking spice, in herbal blends, and occasionally as an essential oil or extract.

How it works

The plant contains compounds called hydroxy-alpha-sanshools, which are responsible for the tingling, numbing sensation. These molecules interact with nerve endings and touch receptors, which is why the mouth feels like it is buzzing or slightly numb.

It also contains essential oils, flavonoids, and alkaloids that have shown antioxidant, anti-inflammatory, and antimicrobial effects in laboratory and animal studies.

Keep in mind that these mechanisms are mostly based on lab and animal research. Showing an effect in a test tube does not prove the same benefit happens in the human body.

Effectiveness

Does Chinese Prickly Ash work?

Here’s what the research actually shows for each use — graded by Natural Medicines and reviewed by Dr. Brian Staiger, PharmD.

Evidence overview · 1 use evaluated

1 Insufficient evidence

How to read these evidence grades

Natural Medicines’ 7-point scale. We show each rating’s label word-for-word.

1EffectiveStrong, consistent evidence it works.

2Likely EffectiveGood evidence, though not yet conclusive.

3Possibly EffectiveSome evidence suggests a benefit.

4Possibly IneffectiveSome evidence it may not help.

5Likely IneffectiveFairly strong evidence it doesn’t help.

6IneffectiveStrong evidence it doesn’t work.

7Insufficient Reliable Evidence to RateToo little research to say either way.

For Chinese Prickly Ash, current evidence isn’t strong enough to rate any specific use. The conditions it has been studied for are listed below.

Also studied for 1 condition — evidence insufficient to rate

Insufficient Reliable Evidence To Rate Aging skin

Rating & evidence shown verbatim from Natural Medicines

Preliminary clinical research in adult females with visible crow's feet shows that topical application of a cream containing Chinese prickly ash fruit extract 2% once daily for 30 days reduces the height of wrinkles and improves self-reported wrinkle appearance when compared with placebo. However, it did not affect skin hydration or elasticity.

Sources Ref 104832

Source & disclaimer. Effectiveness ratings and evidence summaries are provided by Natural Medicines (Therapeutic Research Center) and shown as licensed. Where Natural Medicines hasn’t rated a use, HelloPharmacist’s pharmacists may add their own reviewed rating and evidence (each such entry is labeled). This is educational information, not medical advice — talk with your pharmacist or doctor before starting, stopping, or changing a supplement.

Safety & precautions

When used in normal cooking amounts, Chinese Prickly Ash is generally considered safe for most people. Concentrated extracts, essential oils, and large medicinal doses are not well studied, so caution is warranted.

People with allergies to citrus or related plants should be careful, since this plant is in the citrus family. Anyone with a chronic health condition or who is taking regular medication should check with a pharmacist or doctor before using it as a remedy.

Pregnancy and breastfeeding: Culinary amounts in food are likely fine, but medicinal or concentrated amounts should be avoided because there is not enough safety information. When in doubt, do not use it during pregnancy or while breastfeeding.

Side effects

The most noticeable effect is the temporary tingling and numbness of the mouth, which is harmless and fades on its own. Some people may experience mild stomach upset.

Allergic reactions are possible, especially in people sensitive to citrus plants. Stop using it and seek medical care if you notice rash, swelling, or trouble breathing.

Highly concentrated essential oils can irritate the skin or mucous membranes and should never be swallowed unless a qualified professional advises it.

Dosing

There is no established standardized medicinal dose for Chinese Prickly Ash. As a cooking spice, people use small culinary amounts to taste.

If you choose a supplement, extract, or essential oil product, follow the directions on the product label and do not exceed them. Because product strength varies widely, it is best to ask a pharmacist or doctor before starting, especially if you take other medicines or have a health condition.

References & further reading

The 2 references that drive our Chinese Prickly Ash monograph and interaction data, from the evidence-graded Natural Medicines (TRC Healthcare) database. Citations with a link open the study on PubMed or the publisher’s site.

Yang YP, Cheng MJ, Teng CM, et al. Chemical and anti-platelet constituents from Formosan Zanthoxylum simulans. Phytochemistry 2002;61:567-72.. PubMed
Zeng X, Li X, Wang X, Wen X, Jiang X. The effect of Zanthoxylum bungeanum maxim extract on crow's feet: A double-blind, split-face trial. Dermatol Ther. 2019 Nov;32(6):e13079.

Keep reading

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.

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.

Pharmacist Counseling Corner

Chinese Prickly Ash: Common Questions

What is Chinese Prickly Ash used for, and does it work?

People use Chinese Prickly Ash for a range of reasons, but according to the Natural Medicines database the current clinical evidence is insufficient to confirm it works for the specific conditions it has been studied for. See the graded list on this page, and talk to your pharmacist or doctor before relying on it for any condition.

Does Chinese Prickly Ash interact with prescription medications?

Yes. We list 122 medications with a known interaction with Chinese Prickly Ash. Use the checker above to see how Chinese Prickly Ash interacts with a specific drug.

How are Chinese Prickly Ash interactions rated?

Each interaction is graded major, moderate, or minor based on how clinically significant it is and the strength of the evidence behind it. Major interactions are the most serious and are best avoided, or used only under close professional supervision.

Is it safe to take Chinese Prickly Ash with my medications?

It depends on the specific medication. Some combinations are fine, while others call for monitoring, timing changes, or should be avoided. Check your exact drug above and confirm with your pharmacist or doctor before starting, stopping, or changing anything.

Where does this Chinese Prickly Ash interaction information come from?

Our interaction data is built on the Natural Medicines database — an evidence-graded reference for vitamins, herbs, and supplements — and is reviewed by licensed HelloPharmacist pharmacists, who may add clinical context.

What is Chinese Prickly Ash used for?

It is mainly used as a spice (Sichuan pepper) and traditionally for digestive complaints, toothache, and mild pain. Strong human evidence for medical uses is limited.

Why does it make my mouth tingle and go numb?

It contains compounds called sanshools that activate nerve endings in your mouth, creating a temporary tingling, buzzing, numbing feeling. This effect is harmless and wears off on its own.

Is Chinese Prickly Ash safe to eat?

Yes, used in normal cooking amounts it is generally safe for most people. Concentrated extracts and essential oils are not well studied, so use those with caution and professional advice.

Can I use it during pregnancy or while breastfeeding?

Eating it as a spice in food is likely fine, but you should avoid medicinal or concentrated amounts because the safety is not known. Check with your doctor or pharmacist first.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

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