Herb & supplement monograph

Radish Drug Interactions, Uses, Effectiveness, Safety & More

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

What is this page for?

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

But these pages have grown well beyond that into a full monograph — what Radish 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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Radish 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 Radish 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 only been studied in animals.

Interactions deserving the most attention

The one group of medicines worth watching is diabetes medications. Animal research suggests radish may lower blood sugar on its own, so in theory eating large amounts or taking radish supplements alongside these drugs could add to their effect and increase the chance of low blood sugar. Since blood sugar is something people on these medicines already track closely, that is where any real-world effect would show up first. This has not been confirmed in human studies.

What the rest of the list means

Although dozens of medications appear on the interaction list, they all come from this same blood sugar concern applied across many individual diabetes drugs. The evidence behind it is animal research only, so a predicted effect in a rat study does not mean the combination causes meaningful changes in people. For most other medicines, radish as a food raises no documented concern at all.

Check your medications against Radish

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

Interaction report

Drugs that interact with Radish

86 medications have a known interaction with Radish, 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 Radish using our pharmacist-reviewed interaction data.

AI summaries are generated from our Radish 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 Radish 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 Radish affects

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

All 1 drug category Radish interacts with

Antidiabetes Drugs

Theoretically, radish might increase the risk of hypoglycemia when taken with antidiabetes drugs.
Animal research shows that radish extract, juice, and sprouts can reduce glucose levels. Animal research also shows that radish root juice 300 mg/kg reduces fasting and postprandial blood glucose in a rat model of diabetes, with effects similar to glibenclamide.

Likelihood Possible Evidence D

Monograph

Radish: Uses, Safety & Side Effects

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

The bottom line

Radish is a common edible root vegetable that is nutritious and generally safe to eat as food. Some people use radish (especially black radish) and its extracts for digestion and liver support, but high-quality human evidence for supplement-level health benefits is limited. Eating radish as part of a normal diet is fine for most people; talk to your pharmacist or doctor before using concentrated supplements.

Scientific name: Raphanus sativus
Family: Brassicaceae
Part used: Root, leaves, seeds, and sprouts
Common forms: Fresh vegetable, juice, sprouts, powders, and capsules or extracts

People commonly use it for

Digestive support
Liver and gallbladder health
Antioxidant support
Respiratory and cough relief
General nutrition

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

Safety at a glance

OverallLikely safe

Radish is widely eaten as food and is generally safe in normal dietary amounts.

PregnancyInsufficient reliable information

Insufficient reliable information available; avoid very large doses.

Read the full pregnancy detail

BreastfeedingInsufficient reliable information

Insufficient reliable information available; avoid very large doses.

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.

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Overview

Radish (Raphanus sativus) is a root vegetable in the cabbage and mustard family (Brassicaceae). It comes in many types, including the small red garden radish, white daikon, and black radish. It is grown and eaten all over the world, both raw and cooked.

Besides being a food, radish has a long history in traditional medicine. The root, leaves, seeds, and sprouts have all been used. Black radish in particular is a popular folk remedy for digestion and liver health. Today radish is also sold as juice, powder, and in capsule or extract form.

How it works

Radish contains natural compounds called glucosinolates and their breakdown products (such as isothiocyanates), which are also found in broccoli and other plants in the same family. In laboratory studies, these compounds show antioxidant activity and may affect enzymes the body uses to process toxins.

Radish also provides vitamin C, fiber, and various plant pigments that may act as antioxidants. Black radish in particular contains compounds thought to support bile flow, which is part of why it is traditionally used for the liver and gallbladder.

It is important to know that most of this information comes from test-tube and animal research. How well these effects translate to real benefits in people who take radish supplements is not clear.

Effectiveness

Does Radish work?

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

Evidence overview · 2 uses evaluated

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

Also studied for 2 conditions — evidence insufficient to rate

Insufficient Reliable Evidence To Rate Biliary disorders

Rating & evidence shown verbatim from Natural Medicines

Although there has been interest in using oral radish for biliary disorders, there is insufficient reliable information about the clinical effects of radish for this purpose.

Insufficient Reliable Evidence To Rate Diabetes

Rating & evidence shown verbatim from Natural Medicines

Although there has been interest in using oral radish for diabetes, there is insufficient reliable information about the clinical effects of radish for this purpose.

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

Radish eaten as a normal food is generally considered safe for most people. Concentrated supplements, extracts, and large amounts of juice are less studied, so use more caution with these.

People with gallstones or a blocked bile duct should be careful, because radish may increase bile flow and could worsen symptoms. People with thyroid conditions may want to avoid eating very large amounts, since plants in this family contain compounds that can affect the thyroid in high amounts.

For pregnancy, eating radish as food is likely fine, but avoid concentrated supplements because they have not been well studied. Raw sprouts should be avoided during pregnancy due to the risk of foodborne bacteria. For breastfeeding, food amounts are likely fine, but the safety of radish supplements is unknown, so caution is advised. When in doubt, check with your pharmacist or doctor.

Side effects

For most people, radish causes few problems when eaten in normal amounts. The most common complaints are gas, bloating, or stomach upset, especially when eaten raw or in large amounts.

Some people may have an allergy to radish or other plants in the cabbage family. Rarely, allergic reactions can be serious. Stop using radish and seek medical help if you notice swelling, trouble breathing, or a widespread rash.

Raw radish sprouts, like other raw sprouts, can sometimes carry harmful bacteria such as Salmonella or E. coli. Wash produce well and consider cooking sprouts if your immune system is weak.

Radish: Reported Adverse Effects

Documented safety reports on Radish from the evidence-graded Natural Medicines (TRC Healthcare) database, shown word-for-word from the licensed record.

Reports by condition

Allergic rhinitis (hay fever) Immunologic

A case of allergy to oral intake of radish has been reported. Symptoms included throat tightness and generalized urticaria.

Damiani E, Aloia AM, Priore MG, Nardulli S, Ferrannini A. Generalized urticaria after ingestion of Raphanus sativus. Ann Allergy Asthma Immunol. 2011 Feb;106(2):168.

Dyspepsia Gastrointestinal

Large amounts of radish may cause irritation of the gastrointestinal mucus membrane. Mild indigestion has also been associated with use of a specific product containing radish, camu camu, acerola, honey, and tapioca in clinical research. However, it is unclear if this adverse event is due to radish, other ingredients in the product, or the combination.

Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
Evans M, Paterson E, Barnes DM. An open label pilot study to evaluate the efficacy of Spanish black radish on the induction of phase I and phase II enzymes in healthy male subjects. BMC Complement Altern Med. 2014 Dec 9;14:475.

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.

Adverse-effects data: Natural Medicines, Therapeutic Research Center

Dosing

There is no standardized medicinal dose for radish. As a food, you can simply eat it as part of a normal diet.

For radish juice, powders, or capsules, a proven supplement dose has not been established by research. If you choose to use a product, follow the directions on the label and do not exceed the recommended amount.

Because product strength varies and good dosing studies are lacking, it is a good idea to check with your pharmacist or doctor before starting any concentrated radish supplement, especially if you have a health condition or take medications.

Pregnancy & Breastfeeding

Radish & Pregnancy

Insufficient reliable information

Insufficient reliable information available; avoid very large doses.

Radish & Breastfeeding

Insufficient reliable information

Insufficient reliable information available; avoid very large doses.

Pregnancy & lactation ratings: Natural Medicines, Therapeutic Research Center

References & further reading

The 5 references that drive our Radish 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.

Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
Damiani E, Aloia AM, Priore MG, Nardulli S, Ferrannini A. Generalized urticaria after ingestion of Raphanus sativus. Ann Allergy Asthma Immunol. 2011 Feb;106(2):168. PubMed
Evans M, Paterson E, Barnes DM. An open label pilot study to evaluate the efficacy of Spanish black radish on the induction of phase I and phase II enzymes in healthy male subjects. BMC Complement Altern Med. 2014 Dec 9;14:475. PubMed
Banihani SA. Radish (Raphanus sativus) and diabetes. Nutrients. 2017;9(9). pii: E1014. PubMed
Shukla S, Chatterji S, Mehta S, Rai PK, Singh RK, Yadav DK, Watal G. Antidiabetic effect of Raphanus sativus root juice. Pharm Biol. 2011 Jan;49(1):32-7.

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.

Brand directory

Brands that make products with Radish

155 brands in our database make a supplement containing Radish.

Rise-N-Shine 168 products Ryse 19 products Seeking Health 405 products Solgar 1,940 products Soria Natural 10 products SP Standard Process 268 products SuperJuice 2 products Supreme Nutrition Products 57 products Swanson 1,121 products Swanson Condition Specific Formulas 54 products Swanson Premium Brand 788 products Swanson Ultra 402 products Syntrax 264 products Systemic Formulas Bio Challenge 21 products TerraVita 2,475 products TerraVita Premium Collection 4,019 products Thera-Zyme 26 products Trace Minerals Research 311 products Trader Joe's 54 products TRUNATURE 31 products up&up 230 products Vinco 105 products Vinco's 39 products Vital Proteins 119 products

Product directory

Supplement products with Radish

770 products in our database contain Radish. Open any to see its full ingredient list and every drug interaction we check.

Pharmacist Counseling Corner

Radish: Common Questions

What is Radish used for, and does it work?

People use Radish 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 Radish interact with prescription medications?

Yes. We list 86 medications with a known interaction with Radish. Use the checker above to see how Radish interacts with a specific drug.

How are Radish 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 Radish 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 Radish 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.

Is Radish good for you?

Yes. As a food, Radish is low in calories and provides fiber, vitamin C, and antioxidants, making it a healthy part of a balanced diet. Specific medical claims about Radish supplements, however, are not well proven.

Can Radish help with digestion or the liver?

Radish, especially black Radish, is traditionally used to support digestion and bile flow. Some early lab and animal studies are supportive, but strong human evidence is limited, so don't rely on it to treat any medical condition.

Is it safe to eat Radish during pregnancy?

Eating Radish as food is likely fine during pregnancy, but you should avoid raw sprouts (due to bacteria risk) and concentrated supplements that haven't been studied. Check with your doctor if unsure.

Can Radish cause side effects?

In normal food amounts, Radish usually only causes gas or bloating in some people. Allergic reactions are possible but uncommon, and raw sprouts can occasionally carry harmful bacteria.

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

Keep exploring

Products that contain Radish

A rotating sample of real supplements in our database that list Radish — open any to see its full ingredients and every drug interaction we check.

See all 770 products with Radish →

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Radish Drug Interactions, Uses, Effectiveness, Safety & More

Your Choice:

Radish Drug Interactions: The Bottom Line

Drugs that interact with Radish

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

What Severity, Likelihood & Evidence Mean

Severity — How Serious It Can Be

Likelihood — How Well It’s Documented

Where This Data Comes From

The kinds of drugs Radish affects

Radish: Uses, Safety & Side Effects

Overview

How it works

Does Radish work?

Safety & precautions

Side effects

Radish: Reported Adverse Effects

Dosing

Radish & Pregnancy

Radish & Breastfeeding

References & further reading

Brands that make products with Radish

Supplement products with Radish

Radish: Common Questions

Related supplements & herbs

Products that contain Radish

Have a question about Radish?