Drug & supplement interaction

Wafer Ash + Diroximel Fumarate

Diroximel Fumarate brand name: Vumerity.

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 Wafer Ash and Diroximel Fumarate 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 Diroximel Fumarate states a food rule worth keeping to.

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Interaction report

Wafer Ash and Diroximel Fumarate

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 Diroximel Fumarate and Wafer Ash 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 Wafer Ash at all — not against Diroximel Fumarate, 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.

Wafer Ash safety at a glance

Wafer Ash overall Not established Modern safety data are very limited, so caution is advised.
Pregnancy Avoid Not enough safety information; avoid during pregnancy.
Breastfeeding Avoid No reliable safety data; best to avoid while breastfeeding.

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

Still wondering about combining Diroximel Fumarate and Wafer Ash? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

What Diroximel Fumarate’s Own FDA Label Lists

This is not an interaction — none of it involves Wafer Ash. These are the most notable effects listed in the ADVERSE REACTIONS section of Diroximel Fumarate’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. 4 of them are worth acting on rather than waiting out — marked below.

  • A severe allergic reaction Worth acting on
  • A low white blood cell count Worth acting on
  • Liver problems Worth acting on
  • A higher chance of infection Worth acting on
  • Flushing mentioned in 13.6% of FDA reports for Diroximel Fumarate
  • Stomach upset
  • Diarrhea mentioned in 7.4% of FDA reports for Diroximel Fumarate
  • Itching
  • Stomach pain
  • Nausea mentioned in 6.4% of FDA reports for Diroximel Fumarate

Showing the 10 most notable of 12 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 Diroximel Fumarate. Read the label on DailyMed › Where a percentage is shown, it is the share of 11,848 voluntary FDA FAERS reports for Diroximel Fumarate that mention that effect — a reporting proportion, not an incidence rate and not evidence the drug caused it. Wafer Ash’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no Wafer Ash side to compare — that is a limit of the record, not a statement that Wafer Ash has no side effects.

How to take them

Some Diroximel Fumarate Products Have a Food Rule — Wafer Ash Should Not Break It

At least one FDA label for a product containing Diroximel Fumarate says to take it with food. If you take Wafer Ash on an empty stomach out of habit, keep them separate — and take Diroximel Fumarate 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 Diroximel Fumarate 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.

If taken with food, avoid a high-fat, high-calorie meal/snack; the meal/snack should contain no more than 700 calories and no more than 30 g fat [see Warnings and Precautions ( 5.6 ) and Clinical Pharmacology ( 12.3 )] .

From the Dosage and Administration section of the FDA label we read for Diroximel Fumarate — 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 Diroximel Fumarate

This page covers Wafer Ash only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Diroximel Fumarate page lists 106 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Beer (major), Siberian Cocklebur (major), Wine (major) and Active Hexose Correlated Compound (ahcc) (moderate).

By severity: 4 major · 92 moderate · 10 minor.

From our pharmacist’s overview on the Diroximel Fumarate page

“Diroximel fumarate (Vumerity) treats relapsing multiple sclerosis by quieting an overactive immune system, and I read its interaction list with real seriousness. Four of the 106 entries rate major, and none are exotic.”

Reviewed by 2 · Jul 18, 2026

Open the Diroximel Fumarate interaction page

How much people look this up

Where Wafer Ash and Diroximel Fumarate 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 Wafer Ash
Steady interest

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

29 days ago today
Medication Diroximel Fumarate
Top half

#720 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. Wafer Ash 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 Wafer Ash reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Wafer Ash and Diroximel Fumarate 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 Wafer Ash

What is Wafer Ash?

  • Digestive complaints
  • Loss of appetite
  • Mild fever
  • Traditional tonic
  • Wound or skin care (folk use)

Wafer Ash (Ptelea trifoliata) is a North American shrub traditionally used in folk and herbal medicine as a bitter digestive tonic. There is very little modern human research to support any health benefit, and its safety has not been well studied, so use cautiously and talk with a pharmacist or doctor first.

Ptelea trifoliata · Rutaceae · Bark (especially root bark), leaves, and fruit · Tincture, dried bark, tea, capsules

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

Wafer Ash: dosing

There is no established, standardized dose for Wafer Ash. It has not been studied enough to know a safe or effective amount.If you choose to use a product, follow the directions on the label exactly and do not exceed them.

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

Read the full Wafer Ash monograph & all interactions
Medication

About Diroximel Fumarate

What Is Diroximel Fumarate Used For?

Brand name: Vumerity

Vumerity (diroximel fumarate) is used to treat relapsing forms of multiple sclerosis (MS) in adults. This includes three specific types: clinically isolated syndrome (a first MS episode), relapsing-remitting MS (the most common pattern of flares and recovery), and active secondary progressive MS (a later stage where disability gradually worsens but relapses still occur).

Most-Reported Side Effects for Diroximel Fumarate

From FAERS, the FDA’s public side-effect reporting system (11,848 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Flushing 1,611 reports
Multiple sclerosis 1,099 reports
Multiple sclerosis relapse 973 reports
Diarrhea 873 reports
Fatigue 781 reports
See full Diroximel Fumarate drug information
Keep checking

Other Drugs & Wafer Ash

Browse every other medication we’ve checked against Wafer Ash — 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 Wafer Ash 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 Wafer Ash list.

See the full Wafer Ash interactions page
See every supplement checked against Diroximel Fumarate, ranked by severity
Evidence & sources

Wafer Ash References

The 2 sources that drive our Wafer Ash monograph — publicly available pages from reputable medical and government organizations. Every link was verified to work before publishing. Wafer Ash 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 Wafer Ash and Diroximel Fumarate Together: Common Questions

Is it safe to take Wafer Ash with Diroximel Fumarate?
We do not list a known interaction between Wafer Ash and Diroximel Fumarate. 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 Wafer Ash and Diroximel Fumarate at the same time of day?
At least one FDA label for a product containing Diroximel Fumarate says to take it with food. If you take Wafer Ash on an empty stomach out of habit, keep them separate and take Diroximel Fumarate with a meal where the label says to. Food instructions belong to the product rather than the ingredient — two Diroximel Fumarate products can differ — so check the directions on your own box. This is about absorption, not an interaction.
Does Diroximel Fumarate interact with any supplements?
Yes. Diroximel Fumarate has documented interactions with 106 supplements in our database — Wafer Ash is not one of them. The Diroximel Fumarate 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

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

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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.