Drug & supplement interaction

White Oak + Mexiletine

Mexiletine brand name: Mexitil.

No Known Interaction
Medically reviewed by · Updated June 2026 · Pair last verified Sep 13, 2026
The bottom line No known interaction

We found no known interaction between White Oak and Mexiletine 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. Additionally, although there is no interaction, the label for Mexiletine states a food rule worth keeping to.

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Interaction report

White Oak and Mexiletine

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 Mexiletine and White Oak 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 White Oak at all — not against Mexiletine, 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.

White Oak safety at a glance

White Oak overall Use caution Generally used short-term, but its high tannin content can irritate the digestive tract and is not well studied.
Pregnancy Avoid Not enough safety data, so it is best avoided during pregnancy.
Breastfeeding Avoid Safety while breastfeeding is unknown, so avoid use.

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

Still wondering about combining Mexiletine and White Oak? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

What Mexiletine’s Own FDA Label Lists

This is not an interaction — none of it involves White Oak. These are the most notable effects listed in the ADVERSE REACTIONS section of Mexiletine’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. 10 of them are worth acting on rather than waiting out — marked below.

  • Memory problems Worth acting on
  • Trouble swallowing Worth acting on
  • Bleeding in the gut Worth acting on
  • Unsteadiness Worth acting on
  • A slow heartbeat Worth acting on
  • Hallucinations Worth acting on
  • Pancreatitis Worth acting on
  • Heart failure Worth acting on
  • Fainting Worth acting on
  • An irregular heartbeat Worth acting on

Showing the 10 most notable of 53 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 Mexiletine. Read the label on DailyMed › White Oak’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no White Oak side to compare — that is a limit of the record, not a statement that White Oak has no side effects.

How to take them

Some Mexiletine Products Have a Food Rule — White Oak Should Not Break It

At least one FDA label for a product containing Mexiletine says to take it with food. If you take White Oak on an empty stomach out of habit, keep them separate — and take Mexiletine with a meal where the label says to.

This may not be true of your version. Food instructions belong to the product, not the ingredient: two Mexiletine products can carry different directions, and extended-release forms often differ from immediate-release ones. The label we read is quoted below — check the directions on your own box or bottle, or ask your pharmacist, for how to take the exact product you were given.

Administration with food or antacid is recommended.

From the Dosage and Administration section of the FDA label we read for Mexiletine — where that label names a specific product, the instruction is that product's. Read the label on DailyMed ›

A food rule is not an interaction — it is about how much of the medicine you absorb. The directions that came with your own product, and your pharmacist, outrank anything on this page.

Everything else you take

See Every Supplement That Interacts With Mexiletine

This page covers White Oak only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Mexiletine page lists 152 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), 1,3-dmaa (moderate), Acacia Rigidula (moderate), Active Hexose Correlated Compound (ahcc) (moderate) and Adrafinil (moderate).

By severity: 1 major · 107 moderate · 44 minor.

From our pharmacist’s overview on the Mexiletine page

“Mexiletine (Mexitil) steadies the heart's rhythm, and its benefit depends on holding a fairly precise blood level, so the 152 supplements on this list deserve real attention rather than a shrug. Only one entry, activated charcoal, is rated major, because it can soak up the drug in the gut and cut how much actually reaches your bloodstr…”

Reviewed by 2 · Jul 18, 2026

Open the Mexiletine interaction page

One more smart check

Taking White Oak as Part of a Dietary Supplement Product? Check It for Interactions

We hold 132 real supplement products containing White Oak, each one broken down to its full ingredient list — and combination products often carry several ingredients besides White Oak. Even though White Oak itself has no known interaction with Mexiletine, 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 White Oak and Mexiletine 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 White Oak
Steady interest

#1,080 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Mexiletine
Top half

#743 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. White Oak is not yet covered by that licensed database, so its write-up cites publicly available medical sources directly (see the references below).
  • Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every White Oak reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The White Oak and Mexiletine 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 White Oak

What is White Oak?

  • Diarrhea
  • Sore throat and mouth irritation
  • Minor skin inflammation and wounds
  • Hemorrhoids
  • Excessive sweating (topical)

White oak bark is a traditional herbal remedy rich in tannins, used mostly as a tea or skin wash for diarrhea, sore throat, and minor skin problems. Solid human evidence is very limited, and the high tannin content can irritate the stomach, so it should be used cautiously and not for long periods. Talk to a pharmacist or doctor before using it, especially during pregnancy or breastfeeding.

Quercus alba · Fagaceae · Bark (mainly inner bark) · Dried bark, tea/decoction, liquid extract, tincture, powder, capsules, topical washes

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

White Oak: dosing

There is no well-established, standardized dose for white oak bark, and the amount of active tannins can vary a lot between products.Traditional preparations include teas (decoctions) of the bark taken by mouth, and stronger washes or compresses used on the skin or as a gargle.

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

Read the full White Oak monograph & all interactions
Medication

About Mexiletine

What Is Mexiletine Used For?

Brand name: Mexitil

Mexiletine Hydrochloride capsules are indicated for the treatment of documented, life-threatening ventricular arrhythmias — for example, sustained ventricular tachycardia (a dangerously fast heart rhythm originating in the lower chambers). Because mexiletine itself can trigger arrhythmias, it is not recommended for minor or symptom-free irregular heartbeats.

Treatment is started in a hospital setting so heart rhythm can be monitored closely. Antiarrhythmic drugs, including mexiletine, have not been shown to improve overall survival in patients with ventricular arrhythmias.

See full Mexiletine drug information
Keep checking

Other Drugs & White Oak

Browse every other medication we’ve checked against White Oak — 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 White Oak 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 White Oak list.

See the full White Oak interactions page
See every supplement checked against Mexiletine, ranked by severity
Evidence & sources

White Oak References

The 2 sources that drive our White Oak monograph — publicly available pages from reputable medical and government organizations. Every link was verified to work before publishing. White Oak is not covered by the licensed Natural Medicines interaction database, so its page cites these public sources directly.

  1. Herbs at a Glance — NIH NCCIH Source
  2. Herbs and Supplements — MedlinePlus Source

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 White Oak and Mexiletine Together: Common Questions

Is it safe to take White Oak with Mexiletine?
We do not list a known interaction between White Oak and Mexiletine. 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.
Should I take White Oak and Mexiletine at the same time of day?
At least one FDA label for a product containing Mexiletine says to take it with food. If you take White Oak on an empty stomach out of habit, keep them separate and take Mexiletine with a meal where the label says to. Food instructions belong to the product rather than the ingredient — two Mexiletine products can differ — so check the directions on your own box. This is about absorption, not an interaction.
Does Mexiletine interact with any supplements?
Yes. Mexiletine has documented interactions with 152 supplements in our database — White Oak is not one of them. The Mexiletine 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

White Oak monograph Uses, safety profile, and every drug interaction in one place Mexiletine drug information The full plain-English guide to this medication Mexiletine supplement interactions Every supplement checked against Mexiletine, 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 Mexiletine and White Oak?

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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.