Drug & supplement interaction

English Horsemint + Valrubicin

Valrubicin brand name: Valstar.

No Known Interaction
Medically reviewed by · Updated June 2026 · Pair last verified Sep 20, 2026
The bottom line No known interaction

We found no known interaction between English Horsemint and Valrubicin in our sources. Absence of a documented interaction is not the same as proven safety, and does not guarantee one does not exist. Do not start, stop, or change a medication or supplement based on this page; confirm with your pharmacist or doctor first.

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Interaction report

English Horsemint and Valrubicin

We checked these two against our interaction database. Here is what we found.

No Known Interaction Found

We did not find a documented interaction between Valrubicin and English Horsemint in our sources. This does not guarantee that the combination is completely free of risk — there is often limited research on supplements and herbal products, especially around drug interactions.

Worth understanding: our licensed dataset holds no drug-interaction record for English Horsemint at all — not against Valrubicin, and not against any other medication we track. This verdict therefore rests on the absence of any recorded data, not on research that looked at this combination and found nothing. We cannot rule an interaction out.

If you decide to take both, the practical routine is simple: add one new thing at a time and note the date you started it. If the combination is going to disagree with you, it usually shows in the first days to a couple of weeks — and a start date turns “I’ve been feeling off” into something a pharmacist can actually work with. Do not stop a prescribed medicine on your own.

Always talk with your pharmacist or doctor before making changes to your medications or supplements, particularly if you take several medications or have an ongoing health condition.

English Horsemint safety at a glance

English Horsemint overall Use caution Likely fine in culinary food amounts, but concentrated extracts and essential oil lack strong human safety data.
Pregnancy Avoid Avoid medicinal amounts and the essential oil during pregnancy due to insufficient safety data.
Breastfeeding Avoid Not enough information to confirm safety, so avoid medicinal use while breastfeeding.

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

Still wondering about combining Valrubicin and English Horsemint? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

What Valrubicin’s Own FDA Label Lists

This is not an interaction — none of it involves English Horsemint. These are the most notable effects listed in the ADVERSE REACTIONS section of Valrubicin’s own FDA label, for the medication by itself. Knowing the drug’s own list makes it easier to work out the likely cause if something new turns up while you take both. 6 of them are worth acting on rather than waiting out — marked below.

  • Pain or burning when passing urine Worth acting on
  • Trouble passing urine Worth acting on
  • High blood sugar Worth acting on
  • Chest pain Worth acting on
  • Anemia Worth acting on
  • A higher chance of infection Worth acting on
  • Loss of bladder control
  • Passing urine more often
  • Bloating or gas
  • Back pain

Showing the 10 most notable of 22 label-listed effects — ranked by how unusual each one is across medicines generally, with serious effects weighted up.

From the ADVERSE REACTIONS section of the FDA label for Valrubicin. Read the label on DailyMed › English Horsemint’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no English Horsemint side to compare — that is a limit of the record, not a statement that English Horsemint has no side effects.

Everything else you take

See Every Supplement That Interacts With Valrubicin

This page covers English Horsemint only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Valrubicin page lists 24 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Acerola (moderate), Alpha-lipoic Acid (moderate), Coffee Charcoal (moderate) and European Mandrake (moderate).

By severity: 1 major · 14 moderate · 9 minor.

From our pharmacist’s overview on the Valrubicin page

“Activated charcoal is the supplement I would flag hardest for anyone receiving valrubicin (Valstar), a chemotherapy instilled directly into the bladder for cancer. It carries the only major rating among the 24 ingredients on this page, since charcoal can bind and clear many drugs from the body even when they are not swallowed.”

Reviewed by 2 · Jul 18, 2026

Open the Valrubicin interaction page

One more smart check

Taking English Horsemint as Part of a Dietary Supplement Product? Check It for Interactions

We hold 11 real supplement products containing English Horsemint, each one broken down to its full ingredient list — and combination products often carry several ingredients besides English Horsemint. Even though English Horsemint itself has no known interaction with Valrubicin, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:

How much people look this up

Where English Horsemint and Valrubicin 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.

Supplement English Horsemint
Steady interest

#1,267 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Valrubicin
Steady interest

#2,737 of 2,830 medications looked up here in the last 7 days

29 days ago today

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.

Where does our data come from?
  • Source: the Natural Medicines (TRC Healthcare) clinical database — the evidence-graded professional reference for herb & supplement interactions.
  • Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every English Horsemint reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The English Horsemint and Valrubicin records this page draws on were last updated June 22, 2026.
  • What “no known interaction” means: no documented interaction in the sources above — not a guarantee of safety. Supplements are studied far less than prescription drugs, so we say exactly what the evidence supports, and nothing more.
Data structure & sourcing designed and verified by .
Supplement

About English Horsemint

What is English Horsemint?

English Horsemint
  • Digestive upset
  • Gas and bloating
  • Cough and congestion
  • Nausea
  • Antimicrobial (traditional use)
  • Headache (topical/aromatic)

English horsemint (Mentha longifolia) is a wild mint used in cooking and traditional medicine, mostly for digestive and respiratory complaints. Human evidence for these uses is limited, and most data come from lab or animal studies. It is generally considered safe in food amounts, but concentrated extracts and the essential oil should be used cautiously and avoided during pregnancy and breastfeeding without medical advice.

Mentha longifolia · Lamiaceae · Leaves and essential oil · Tea, dried leaf, tincture, essential oil

An interaction check asks whether these two react with each other — it does not ask whether English Horsemint is a good idea for someone in your situation. Here is what our English Horsemint record says about it on its own.

English Horsemint: dosing

There is no well-established standardized dose for English horsemint. It is most commonly used as a tea made from the dried or fresh leaves, or as a flavoring in food.Because product strengths vary widely, the best advice is to follow the directions on the product label and not exceed them.

From our English Horsemint monograph — the full record covers uses, side effects and every documented interaction.

Read the full English Horsemint monograph & all interactions
Medication

About Valrubicin Intravesical

What Is Valrubicin Intravesical Used For?

Brand name: Valstar

Valrubicin Intravesical Solution is used to treat BCG-refractory carcinoma in situ (CIS) of the urinary bladder — meaning bladder cancer that has not responded to BCG immunotherapy. It is given directly into the bladder (intravesically) rather than taken by mouth or injected into the bloodstream.

This treatment is specifically for patients whose cancer has not responded to BCG and for whom having the bladder surgically removed (cystectomy) right away would carry unacceptable health risks.

Most-Reported Side Effects for Valrubicin

From FAERS, the FDA’s public side-effect reporting system (177 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Underdose 26 reports
Bladder instillation procedure 24 reports
Urge incontinence 20 reports
Bladder spasm 13 reports
Urinary incontinence 11 reports
See full Valrubicin Intravesical drug information
Keep checking

Other Drugs & English Horsemint

Browse every other medication we’ve checked against English Horsemint — both the ones with a known interaction and the ones without. Select any drug for the full detail.

0Major
0Moderate
0Minor
2,829No known interaction
2,829 No interaction
No interaction 2,829 drugs checked — show the list

We also checked English Horsemint against these medications and found no known interaction in our sources. Open any page to confirm.

Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full English Horsemint list.

See the full English Horsemint interactions page
See every supplement checked against Valrubicin, ranked by severity
Evidence & sources

English Horsemint References

The 1 references that drive our English Horsemint 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. Sahib AS. Treatment of irritable bowel syndrome using a selected herbal combination of Iraqi folk medicines. J Ethnopharmacol 2013;148(3):1008-12. PubMed

Medication overviews come from MedlinePlus (NIH); supplement label data from the NIH Dietary Supplement Label Database. Content is written and reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

Pharmacist Counseling Corner

Taking English Horsemint and Valrubicin Together: Common Questions

Is it safe to take English Horsemint with Valrubicin?
We do not list a known interaction between English Horsemint and Valrubicin. That does not guarantee the combination is risk-free, so confirm with your pharmacist or doctor — especially if you take other medications or have a health condition.
Does Valrubicin interact with any supplements?
Yes. Valrubicin has documented interactions with 24 supplements in our database — English Horsemint is not one of them. The Valrubicin interaction page linked on this page lists every one, ranked by severity.

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

Where next

Keep Exploring

English Horsemint monograph Uses, safety profile, and every drug interaction in one place Valrubicin Intravesical drug information The full plain-English guide to this medication Valrubicin supplement interactions Every supplement checked against Valrubicin, ranked by severity Supplement interaction checker Check any supplement or product against your medications Browse medications A–Z Every drug we’ve checked against herbs & supplements References The 1 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Valrubicin and English Horsemint?

Our pharmacists answer your medication & supplement questions — free.

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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.