Herb & supplement monograph

Swallowroot Drug Interactions, Uses, Safety & More

Medically reviewed by ·Updated June 2026
What is this page for?

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

But these pages have grown well beyond that into a full monograph — what Swallowroot 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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Reviewed by licensed pharmacists Sourced from Natural Medicines
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Swallowroot 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 Swallowroot drug interaction appears low for most people, because the only known concern comes from laboratory research rather than studies in humans. None of the listed interactions are rated major, and every one traces back to a single theoretical bleeding concern that has not been confirmed in people.

Interactions deserving the most attention

The interactions that deserve the most attention involve anticoagulant and antiplatelet medications, the blood thinners used to prevent clots. Lab studies suggest swallowroot may make platelets less likely to clump, so in theory it could add to the effect of these drugs and raise bleeding risk. Because bleeding is a serious outcome and blood thinners work within a narrow margin, this combination is worth a careful conversation even though the evidence is still preliminary.

What the rest of the list means

The long list of medications may look worrying, but it reflects one theoretical mechanism applied across every blood-thinning drug, not many separate proven problems. So far, the effect on platelets has only been seen in lab research, and no clinically meaningful changes have been shown in people taking these medicines with swallowroot.

Check your medications against Swallowroot

Based on HelloPharmacist’s Swallowroot interaction data and reviewed under our editorial standards.

Interaction report

Drugs that interact with Swallowroot

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

2,830 drugs
AbciximabReoPro› AbrocitinibCibinqo› AcenocoumarolSintrom› Acetaminophen, AspirinGemnisyn› Acetaminophen, Aspirin, CaffeineExcedrin, Excedrin Extra Strength, Excedrin Migraine› Acetaminophen, IbuprofenCombogesic› Acetylsalicylic AcidEntrophen› Alteplase, TpaActilyse, Activase› Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium HydroxideAscriptin Codeine #2› Aluminum Hydroxide, Aspirin, Magnesium HydroxideAscriptin› Anacaulase-bcdbNexoBrid› AnagrelideAgrylin› AnisindioneMiradon› Antithrombin IiiThrombate III› ApixabanEliquis› ArgatrobanArgatroban› AspirinAngettes 75, ASA, Asaphen, Aspirin, Caprin, Cartia +8 more› Aspirin, Aluminum Hydroxide, Codeine Phosphate, Magnesium HydroxideAscriptin Codeine #3› Aspirin, ButalbitalAxotal› Aspirin, Butalbital, CaffeineFiorinal› Aspirin, Butalbital, Caffeine, Codeine PhosphateFiorinal w/ Codeine› Aspirin, Butalbital, Caffeine, PhenacetinMarnal› Aspirin, CaffeineAnacin› Aspirin, Caffeine, Codeine PhosphateAnacin w/ Codeine› Aspirin, Caffeine, Dihydrocodeine BitartrateSynalgos DC› Aspirin, Caffeine, Dover's PwdAcedoval, Dovacet› Aspirin, Caffeine, HydrocodoneDamason-P› Aspirin, Caffeine, Isobutylallylbarbituric Acid, PhenacetinLanorinal› Aspirin, Caffeine, OrphenadrineInvagesic, Invagesic Forte, Norgesic, Norgesic Forte, Orphengesic, Orphengesic Forte› Aspirin, Caffeine, Phenacetin, PropoxypheneMargesic Comp. 65›
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 Swallowroot 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 Swallowroot affects

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

All 1 drug category Swallowroot interacts with
Anticoagulant/antiplatelet Drugs
Anticoagulant/Antiplatelet Drugs

Theoretically, swallowroot might increase the risk of bleeding when taken with anticoagulant or antiplatelet drugs.
In vitro research shows that swallowroot inhibits platelet aggregation.

Likelihood Possible Evidence D
Monograph

Swallowroot: Uses, Safety & Side Effects

Medically reviewed by · Reviewed June 2026 ·
The bottom line

Swallowroot (Decalepis hamiltonii) is a root used in South Indian folk medicine and as a food flavoring, often pickled or made into a cooling drink. Modern scientific evidence for its health benefits in people is very limited, resting mostly on laboratory and animal studies, so its effectiveness is not proven. If you are considering it, talk with your pharmacist or doctor first, especially during pregnancy or breastfeeding.

Scientific name
Decalepis hamiltonii
Family
Apocynaceae
Part used
Roots and root tubers
Common forms
Dried root, root powder, pickles, syrups, and traditional decoctions
People commonly use it for
  • Digestive complaints
  • General tonic and appetite stimulant
  • Blood purifier in folk medicine
  • Antimicrobial and food preservative
  • Cooling drink in hot weather

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

Safety at a glance
OverallLimited data

Human safety data are limited, so use cautiously and under professional guidance.

PregnancyInsufficient reliable information

Insufficient reliable information available; avoid using.

Read the full pregnancy detail
BreastfeedingInsufficient reliable information

Insufficient reliable information available; avoid using.

Read the full breastfeeding detail

Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center). Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Jump to a section

Overview

Swallowroot comes from the plant Decalepis hamiltonii, a climbing shrub native to the hilly regions of southern India. The fragrant roots and root tubers are the parts most often used.

Traditionally, the roots are pickled, made into syrups, or brewed into cooling drinks. The root has a distinctive vanilla-like aroma, which makes it popular as a flavoring and as a folk remedy. In some rural areas it is also harvested heavily, and the plant is now considered threatened in the wild.

People have used Swallowroot for digestion, as a general tonic, and as a natural food preservative. Much of this use is based on long-standing tradition rather than modern clinical proof.

Uses & effectiveness

Swallowroot is used in traditional medicine for a variety of reasons, but the scientific evidence behind these uses is weak and preliminary.

  • Digestive complaints and appetite: Used traditionally to ease stomach upset and stimulate appetite. There are no strong human studies to confirm this.
  • General tonic and "blood purifier": A common folk use, but this is not supported by quality clinical research.
  • Antioxidant and antimicrobial: Laboratory studies suggest the root has antioxidant compounds and may slow the growth of some microbes, which is why it is used to preserve foods. These are test-tube findings and do not prove benefits in people.

Overall, there are no well-designed human clinical trials that establish Swallowroot as an effective treatment for any medical condition. Treat the health claims with caution.

How it works

The root contains aromatic compounds and a range of plant chemicals, including antioxidants. Its characteristic vanilla-like smell comes largely from a compound chemically related to vanillin.

In laboratory and animal research, extracts of Swallowroot have shown antioxidant activity (helping neutralize unstable molecules called free radicals) and some ability to slow the growth of certain bacteria and fungi. These actions may explain its traditional use as a food preservative.

It is important to understand that these mechanisms come mainly from test-tube and animal studies. We do not have good evidence that the same effects happen in the human body at amounts people normally consume.

Safety & precautions

There is very little formal safety information about Swallowroot in humans. When eaten in small amounts as a traditional food or pickle, it has a long history of use, but concentrated supplements or extracts have not been well studied.

People with chronic health conditions, those taking regular medications, children, and older adults should be especially cautious and check with a healthcare professional before using it.

Pregnancy and breastfeeding: Because there is not enough reliable safety data, Swallowroot should be avoided during pregnancy and while breastfeeding. Always speak with your pharmacist or doctor before trying any new herbal product.

Side effects

Reliable data on side effects in people are lacking. As a food, the pickled or flavored root is generally tolerated, but reactions can still occur.

Possible issues with any herbal product include stomach upset, nausea, or an allergic reaction such as rash, itching, or swelling. Stop using it and seek medical care if you have signs of a serious allergic reaction, such as trouble breathing or swelling of the face or throat.

Because the long-term effects of concentrated extracts are unknown, avoid taking large amounts.

Dosing

There is no established standardized dose for Swallowroot. Traditional use varies widely depending on whether it is taken as a pickle, a drink, or a powder.

If you choose to use a commercial product, follow the directions on the label and do not exceed them. Because product quality and strength can vary a lot, it is wise to start low and to ask a pharmacist or doctor for guidance before use.

Pregnancy & Breastfeeding

Swallowroot & Pregnancy

Insufficient reliable information

Insufficient reliable information available; avoid using.

Swallowroot & Breastfeeding

Insufficient reliable information

Insufficient reliable information available; avoid using.

DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.

© 2026 Therapeutic Research Center

Pregnancy & lactation ratings: Natural Medicines, Therapeutic Research Center

References & further reading

The 1 references that drive our Swallowroot 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.

  1. Suneetha WJ, Krishnakantha TP. Effect of swallowroot extract on functions of platelets in vitro. J Thromb Thrombolysis 2005;19:133-4. PubMed
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.

© 2021 Therapeutic Research Center, LLC

Pharmacist Counseling Corner

Swallowroot: Common Questions

Does Swallowroot interact with prescription medications?
Yes. We list 122 medications with a known interaction with Swallowroot. Use the checker above to see how Swallowroot interacts with a specific drug.
How are Swallowroot 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 Swallowroot 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 Swallowroot 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 Swallowroot used for?
It is used in traditional South Indian medicine for digestive complaints, as a general tonic, and as a flavoring and natural food preservative thanks to its vanilla-like aroma. Strong scientific proof for these uses is lacking.
Is Swallowroot safe to take?
When eaten in small amounts as a traditional food it has a long history of use, but concentrated supplements have not been well studied in people. Check with your pharmacist or doctor before using it, especially if you have health conditions or take medications.
Can I take Swallowroot during pregnancy or while breastfeeding?
No reliable safety information is available, so it is best to avoid Swallowroot during pregnancy and breastfeeding.
Does Swallowroot actually work for health problems?
Current evidence is mostly from laboratory and animal studies, with no strong human trials. It has not been proven effective for treating any specific medical condition.

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

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