Drug & supplement interaction

Wasabi + Dexmethylphenidate

Dexmethylphenidate brand name: Focalin.

No Known Interaction
Medically reviewed by · Updated July 2026 · Pair last verified Oct 4, 2026
The bottom line No known interaction

We found no known interaction between Wasabi and Dexmethylphenidate 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

Wasabi and Dexmethylphenidate

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 Dexmethylphenidate and Wasabi 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.

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.

Wasabi safety at a glance

Wasabi overall Use caution Generally safe as a food, but supplement-strength doses are not well studied in people.
Pregnancy Use caution Food amounts are likely fine, but avoid concentrated supplements due to a lack of safety data.
Breastfeeding Use caution Food amounts are likely fine, but supplement doses have not been studied, so caution is best.

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

Still wondering about combining Dexmethylphenidate and Wasabi? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Dexmethylphenidate

Interactions in our licensed database are recorded against drug classes, not just single drug names. Dexmethylphenidate is filed under 5 classifications — including stimulant drugs, serotonergic drugs, serotonergic drugs. Wasabi has documented interactions with 1 drug class — the most serious being anticoagulant/antiplatelet drugs (moderate) — and none of Dexmethylphenidate’s classifications are among them.

Classification data comes from our licensed Natural Medicines dataset. A medication can belong to classes beyond those recorded there, so this describes how the check was run — it is not a safety guarantee.

Keep it in perspective

Wasabi Does Interact With Other Medications

Wasabi has 122 moderate known drug interactions in our database — Dexmethylphenidate isn’t one of them. If you take anything else, check it against the full list below.

Moderate 122 No known interaction 2,708 (incl. Dexmethylphenidate)
Taking anything else?

Check Another of Your Medications Against Wasabi

Covers the 2,830 medications we’ve checked against Wasabi. Pick one to open its full report.

What to actually watch for

What Wasabi Itself Has Been Linked To

This is not an interaction — nothing below involves Dexmethylphenidate. It is the side-effect record for Wasabi on its own, from the licensed Natural Medicines monograph. If something new turns up after you add Wasabi, this list is the first place to look. One entry is worth acting on rather than waiting out — marked below.

  • Kidney problems Worth acting on Additional detail

    “A small clinical study in adults taking oral wasabi extract 1000 mg once daily for 4 weeks has found 2 cases of proteinuria.”

    Wasabi · Natural Medicines adverse-effect record, reported in myasthenia gravis.

    1 source cited
    1. 112846. Nakajima R, Kanou M, Tokushima M, Iwama Y, Yamana K. Oral administration of 6-methylsulfinylhexyl isothiocyanate extracted from wasabi is safe and improves the fatigue and sleep of healthy volunteers. Biopsychosoc Med 2023;17(1):30. PubMed

Everything above comes from the Natural Medicines adverse-effect record for Wasabi — expand a row for the licensed statement it rests on. We read the ADVERSE REACTIONS section of Dexmethylphenidate’s FDA label too, and the two lists don’t meaningfully overlap — which is why no Dexmethylphenidate column appears here.

From our Q&A

Questions About Wasabi or Dexmethylphenidate

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Wasabi or Dexmethylphenidate, not necessarily both, but if one is close to what you were about to ask it will usually go further than a database entry can:

Not quite your question? Ask our pharmacists directly — it is free, there is no account required, and answers usually come back within 24 hours.

Everything else you take

See Every Supplement That Interacts With Dexmethylphenidate

This page covers Wasabi only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Dexmethylphenidate page lists 85 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Ephedra (major), Lithium (major), Peyote (major) and Rauvolfia Vomitoria (major).

By severity: 6 major · 64 moderate · 15 minor.

From our pharmacist’s overview on the Dexmethylphenidate page

“Dexmethylphenidate (Focalin) is itself a prescription stimulant for ADHD, which is exactly why this list deserves real care rather than a quick skim. More than half of the 85 ingredients on file stimulate the nervous system too, so combining them can compound the racing heart, raised blood pressure, and sleeplessness the drug can alrea…”

Reviewed by 2 · Jul 18, 2026

Open the Dexmethylphenidate interaction page

How much people look this up

Where Wasabi and Dexmethylphenidate 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 Wasabi
Steady interest

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

29 days ago today
Medication Dexmethylphenidate
Top 25%

#476 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 Wasabi reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified October 4, 2026. The Wasabi and Dexmethylphenidate records this page draws on were last updated July 10, 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 Wasabi

What is Wasabi?

Wasabi
  • Flavoring for sushi and other foods
  • Antimicrobial support
  • Anti-inflammatory support
  • Antioxidant support
  • General immune support

Wasabi is best known as the pungent green condiment served with sushi, made from a Japanese plant in the cabbage family. Its natural compounds (isothiocyanates) show antimicrobial and antioxidant activity in lab studies, but there is very little human research to support taking it as a supplement. As a food it is generally safe; as a concentrated supplement, talk with your pharmacist or doctor first.

Eutrema japonicum · Brassicaceae · Rhizome (root stem), and sometimes the leaves and stalks · Fresh paste, dried powder, capsules, extracts, and as a culinary condiment

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

Wasabi: dosing

There is no established standard dose for wasabi as a supplement. Research has not identified a safe and effective amount for any specific health purpose.If you choose to use a wasabi product, follow the directions on the label and do not exceed the recommended amount.

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

Read the full Wasabi monograph & all interactions
Medication

About Dexmethylphenidate

What Is Dexmethylphenidate Used For?

Brand name: Focalin

Dexmethylphenidate treats attention deficit hyperactivity disorder (ADHD). Every product in this group is approved for that use: dexmethylphenidate tablets, Focalin tablets, dexmethylphenidate extended-release capsules and Focalin XR extended-release capsules.

The extended-release capsules (dexmethylphenidate and Focalin XR) are not recommended for children younger than 6 years. In that age group, blood levels were higher and side effects such as weight loss were more common.

See full Dexmethylphenidate drug information
Keep checking

Other Drugs & Wasabi

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

0Major
122Moderate
0Minor
2,707No known interaction
122 Moderate 2,707 No interaction
Moderate

122 interactions

Showing 60 of 122 moderate interactions — see all 122 on the Wasabi page.

No interaction 2,707 drugs checked — show the list

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

Showing the 60 most looked-up of 2,707 medications checked with no known interaction — see the full Wasabi list.

See the full Wasabi interactions page
See every supplement checked against Dexmethylphenidate, ranked by severity
Evidence & sources

Wasabi References

The 2 references that drive our Wasabi 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. Morimitsu, Y., Hayashi, K., Nakagawa, Y., Fujii, H., Horio, F., Uchida, K., and Osawa, T. Antiplatelet and anticancer isothiocyanates in Japanese domestic horseradish, Wasabi. Mech Ageing Dev 2000;116(2-3):125-134. PubMed
  2. Nakajima R, Kanou M, Tokushima M, Iwama Y, Yamana K. Oral administration of 6-methylsulfinylhexyl isothiocyanate extracted from wasabi is safe and improves the fatigue and sleep of healthy volunteers. Biopsychosoc Med 2023;17(1):30. 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 Wasabi and Dexmethylphenidate Together: Common Questions

Is it safe to take Wasabi with Dexmethylphenidate?
We do not list a known interaction between Wasabi and Dexmethylphenidate. 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.
How was the Wasabi and Dexmethylphenidate combination checked?
Interactions in our licensed database are recorded against drug classes. Dexmethylphenidate is filed under 5 classifications, and Wasabi has documented interactions with 1 drug class — none of Dexmethylphenidate's classifications are among them. A medication can belong to classes beyond those recorded in our dataset, so this describes how the check was run rather than guaranteeing safety.
Does Wasabi interact with any other medications?
Yes. Wasabi has 122 documented drug interactions in our database — Dexmethylphenidate is simply not one of them. If you take anything else, it is worth checking each one; they are all listed on this page.
Does Dexmethylphenidate interact with any supplements?
Yes. Dexmethylphenidate has documented interactions with 85 supplements in our database — Wasabi is not one of them. The Dexmethylphenidate 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

Wasabi monograph Uses, safety profile, and every drug interaction in one place Dexmethylphenidate drug information The full plain-English guide to this medication Dexmethylphenidate supplement interactions Every supplement checked against Dexmethylphenidate, 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 2 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Dexmethylphenidate and Wasabi?

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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.