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Hedge Mustard Drug Interactions, Uses, Safety & More

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Hedge Mustard 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 Hedge Mustard drug interaction appears low for most people, though those taking heart medicines deserve extra care. None of the listed interactions are rated major, and every one rests on theoretical reasoning rather than documented reactions in people.

Interactions deserving the most attention

The concern that stands out most involves digoxin. Hedge mustard's flowering parts contain compounds that act on the heart the same way digoxin does, so combining them could theoretically add up to too much effect. The same worry extends to medicines that lower potassium, such as potassium-depleting diuretics and overused stimulant laxatives, because low potassium makes these heart-active compounds more toxic. Certain antibiotics and quinine could also, in theory, raise levels of these compounds in the body.

What the rest of the list means

Although the list of interacting medications is long, nearly all of it traces back to this single theoretical concern about hedge mustard's heart-active compounds. None of these effects has been confirmed in human studies, so a medication appearing on the list does not mean the combination has actually caused harm.

Check your medications against Hedge Mustard

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

Interaction report

Drugs that interact with Hedge Mustard

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

2,830 drugs
Acetaminophen, Caffeine, PyrilamineMidol Max Strength Menstrual› Acetaminophen, Pamabrom, PyrilamineMidol Max Strength PMS, Pamprin, Pamprin ES› AcetazolamideAk-Zol, Diamox› Amiloride, HydrochlorothiazideAmil-Co, Amilzide, Moduret 25, Moduretic› Ammonium ChlorideAmmonium Chloride› Amphotericin, TetracyclineMysteclin-F› ArmodafinilNuvigil› Atenolol, ChlortalidoneAtenixCo, Tenoret 50, Totaretic› Atenolol, ChlorthalidoneTenoretic› Azilsartan, ChlorthalidoneEdarbyclor› AzithromycinAzasite, Zithromax, Zmax› Benazepril, HydrochlorothiazideLotensin HCT› BendroflumethiazideAprinox, Naturetin, Neo-NaClex› Bendroflumethiazide, NadololCorzide› Bendroflumethiazide, PotassiumCentyl K, Neo-NaClex-K› Bendroflumethiazide, Rauwolfia SerpentinaRauzide› BenzthiazideExna› BisacodylDulcolax, Gentlax› Bisacodyl, DocusateDulcolax Laxative Tabs› Bismuth Subsalicylate, Metronidazole, TetracyclineHelidac› Bisoprolol, HydrochlorothiazideZiac› BumetanideBurinex› Bumetanide, PotassiumBurinex K› Caffeine, Potassium Salicylate, SalicylamideTrim-Elim› Candesartan Cilexetil, HydrochlorothiazideAtacand HCT› Captopril, HydrochlorothiazideAcezide, Capozide› CasanthranolDoxidan Liquid Gels› Casanthranol, DocusateDoxidan› Casanthranol, Docusate PotassiumDialose Plus› Casanthranol, Docusate SodiumPeri-Colace›
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 Hedge Mustard 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 Hedge Mustard affects

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

All 6 drug categories Hedge Mustard interacts with
Digoxin (lanoxin)Diuretic DrugsMacrolide AntibioticsQuinineStimulant LaxativesTetracycline Antibiotics
Digoxin (Lanoxin)

Theoretically, taking hedge mustard with digoxin might increase the risk of cardiac glycoside toxicity.

The flowering above ground parts of hedge mustard contain cardioactive glycosides. Theoretically, taking hedge mustard with digoxin might increase the risk of cardiac glycoside toxicity.

Likelihood Possible Evidence D
Diuretic Drugs

Theoretically, taking hedge mustard with diuretic drugs might increase the risk of cardiac glycoside toxicity.

The flowering above ground parts of hedge mustard contain cardioactive glycosides. Theoretically, concomitant use of potassium depleting diuretics and hedge mustard can increase the risk of cardiac glycoside toxicity due to potassium depletion.

Likelihood Possible Evidence D
Macrolide Antibiotics

Theoretically, taking hedge mustard with macrolide antibiotics might increase the risk of cardiac glycoside toxicity.

The flowering above ground parts of hedge mustard contain cardioactive glycosides. Macrolide antibiotics appear to increase the gastrointestinal absorption of oral digoxin. Theoretically, concomitant use of macrolide antibiotics might increase the absorption of the cardiac glycosides found in hedge mustard.

Likelihood Possible Evidence D
Quinine

Theoretically, taking hedge mustard with quinine might increase the risk of cardiac glycoside toxicity.

The flowering above ground parts of hedge mustard contain cardioactive glycosides. Quinine may reduce the clearance of oral digoxin. Theoretically, concomitant use of quinine with hedge mustard might reduce the clearance of cardiac glycosides found in hedge mustard.

Likelihood Possible Evidence D
Stimulant Laxatives

Theoretically, taking hedge mustard with stimulant laxatives might increase the risk of cardiac glycoside toxicity.

The flowering above ground parts of hedge mustard contain cardioactive glycosides. Theoretically, overuse or misuse of stimulant laxatives may increase the risk of cardiac glycoside toxicity due to potassium depletion.

Likelihood Possible Evidence D
Tetracycline Antibiotics

Theoretically, taking hedge mustard with tetracycline antibiotics might increase the risk of cardiac glycoside toxicity.

The flowering above ground parts of hedge mustard contain cardioactive glycosides. Tetracycline antibiotics appear to increase the gastrointestinal absorption of oral digoxin. Theoretically, concomitant use of tetracycline antibiotics might increase the absorption of the cardiac glycosides found in hedge mustard.

Likelihood Possible Evidence D
Monograph

Hedge Mustard: Uses, Safety & Side Effects

The bottom line

Hedge mustard is a traditional European herb long nicknamed the 'singer's plant' because it was used to soothe hoarseness and sore throats. Solid scientific evidence for these uses is very limited, so it is best seen as a folk remedy rather than a proven treatment. Talk to your pharmacist or doctor before using it, and avoid it during pregnancy and breastfeeding.

Scientific name
Sisymbrium officinale
Family
Brassicaceae
Part used
Aerial parts (leaves, stems, flowers) and seeds
Common forms
Tea, syrup, tincture, lozenges, gargle/throat preparations
People commonly use it for
  • Hoarseness and voice loss
  • Sore throat
  • Cough
  • Mild laryngitis
  • Throat irritation

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

Safety at a glance
OverallUse caution

Generally considered low-risk for short-term use in adults, but human safety data are limited.

PregnancyPossibly Unsafe

When used orally; avoid using.

Read the full pregnancy detail
BreastfeedingPossibly Unsafe

When used orally; 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

Hedge mustard (Sisymbrium officinale) is a wild plant in the cabbage and mustard family. It grows as a common weed along roadsides, fields, and hedges across Europe, parts of Asia, North Africa, and other temperate regions. The plant has small yellow flowers and a peppery taste, like many of its mustard relatives.

For centuries in European folk medicine, hedge mustard was used to ease throat and voice problems. It earned the nickname the "singer's plant" or "herb of the singers" because people believed it could restore a lost or hoarse voice. Today it is most often taken as a tea, syrup, tincture, or throat lozenge.

Uses & effectiveness

People most commonly use hedge mustard for hoarseness, sore throat, cough, and mild laryngitis. These uses come almost entirely from long-standing traditional practice rather than from strong clinical research.

The scientific evidence is limited and preliminary. Some laboratory studies suggest the plant contains compounds that may have soothing or mild antioxidant effects, but high-quality human studies showing it reliably improves voice problems or throat symptoms are lacking. There is not enough solid evidence to say how well it works for any condition.

In short, hedge mustard may be a gentle traditional remedy for throat comfort, but it should not replace proven treatments or medical care for ongoing voice loss, persistent cough, or throat pain.

How it works

Hedge mustard contains glucosinolates (sulfur compounds typical of the mustard family), flavonoids, and other plant chemicals. When taken as a tea or syrup, these may help coat and soothe irritated tissues in the throat, which could explain its traditional use for hoarseness.

Laboratory research has explored possible antioxidant, anti-inflammatory, and mild muscle-relaxing effects on tissues. However, most of this work is based on test-tube or animal studies, and it is not clear that these effects happen in people at the amounts found in a cup of tea or a dose of syrup.

Safety & precautions

Hedge mustard has been used as a food and folk medicine for a long time, and short-term use of normal amounts is generally thought to be low-risk for healthy adults. Still, formal safety studies in humans are limited.

People with thyroid problems may want to be cautious, since plants in the mustard family contain compounds that can affect the thyroid when eaten in large amounts. People with allergies to other Brassica plants (such as cabbage, broccoli, or mustard) could also react to it.

For pregnancy and breastfeeding, there is not enough reliable safety information. Because of this uncertainty, it is best to avoid hedge mustard if you are pregnant or breastfeeding. Always check with your pharmacist or doctor before using any new herbal product, especially if you have a health condition or take medications.

Side effects

When used in small, food-like amounts, hedge mustard is not commonly linked to serious side effects. Possible problems include stomach upset or mild digestive discomfort, and allergic reactions in people sensitive to mustard-family plants.

As with other mustard-family plants, very large or long-term amounts could in theory affect thyroid function. If you notice a rash, swelling, trouble breathing, or any unusual symptoms, stop using it and seek medical care.

Hedge Mustard: Reported Adverse Effects

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

Orally, hedge mustard might be unsafe due to its cardiac glycoside constituents. Topically, no adverse effects have been reported. However, a thorough evaluation of safety outcomes has not been conducted for either route of administration.

Serious Adverse Effects (Rare):

Orally: Theoretically, digitalis-like effects including cardiac rhythm disorders, diarrhea, headache, and vomiting.

Reports by condition
Cluster headache Neurologic/CNS

Orally, hedge mustard may theoretically cause digitalis-like effects such as headache.

  1. Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
Diarrhea Gastrointestinal

Orally, hedge mustard may theoretically cause digitalis-like effects such as vomiting and diarrhea.

  1. Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
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 well-established standardized dose for hedge mustard. Traditional use involves teas, syrups, and tinctures made from the aerial parts of the plant, but amounts vary widely between products and recipes.

If you choose to use a commercial product, follow the directions on the label and do not exceed the recommended amount. Because dosing is not standardized and quality can vary between brands, it is wise to check with a pharmacist or doctor first, especially before giving it to children or using it for more than a few days.

Pregnancy & Breastfeeding

Hedge Mustard & Pregnancy

Possibly Unsafe

When used orally; avoid using.

  1. Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.

Hedge Mustard & Breastfeeding

Possibly Unsafe

When used orally; avoid using.

  1. Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
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 4 references that drive our Hedge Mustard 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. Blumenthal M, ed. The Complete German Commission E Monographs: Therapeutic Guide to Herbal Medicines. Trans. S. Klein. Boston, MA: American Botanical Council, 1998.
  2. Ellenhorn MJ, et al. Ellenhorn's Medical Toxicology: Diagnoses and Treatment of Human Poisoning. 2nd ed. Baltimore, MD: Williams & Wilkins, 1997.
  3. Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
  4. Burnham TH, ed. Drug Facts and Comparisons, Updated Monthly. Facts and Comparisons, St. Louis, MO.
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

Hedge Mustard: Common Questions

Does Hedge Mustard interact with prescription medications?
Yes. We list 133 medications with a known interaction with Hedge Mustard. Use the checker above to see how Hedge Mustard interacts with a specific drug.
How are Hedge Mustard 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 Hedge Mustard 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 Hedge Mustard 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 Hedge Mustard used for?
It is traditionally used to soothe hoarseness, sore throat, cough, and mild laryngitis. It earned the nickname the 'singer's plant' for its folk use in restoring a lost voice, though strong scientific proof is lacking.
Is Hedge Mustard safe?
Short-term use of small amounts is generally considered low-risk for healthy adults, but human safety data are limited. Check with your pharmacist or doctor before using it, especially if you have a health condition.
Can I use Hedge Mustard during pregnancy or breastfeeding?
There is not enough safety information, so it is best to avoid Hedge Mustard during pregnancy and breastfeeding.
Will Hedge Mustard cure my hoarseness?
It may offer mild, temporary throat comfort as a traditional remedy, but it is not a proven treatment. See a doctor if hoarseness or voice loss lasts more than a couple of weeks.

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

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