Drug & supplement interaction

Ash + Fexofenadine, Pseudoephedrine

Fexofenadine, Pseudoephedrine brand name: Allegra D.

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 Ash and Fexofenadine, Pseudoephedrine 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 Fexofenadine, Pseudoephedrine states a food rule worth keeping to.

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Interaction report

Ash and Fexofenadine, Pseudoephedrine

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 Fexofenadine, Pseudoephedrine and 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.

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.

Ash safety at a glance

Ash overall Use caution Likely fine in food amounts, but medicinal use lacks strong safety data.
Pregnancy Avoid Not enough safety information, so it is best avoided during pregnancy.
Breastfeeding Avoid No reliable safety data, so avoid while breastfeeding.

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

Still wondering about combining Fexofenadine, Pseudoephedrine and Ash? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Fexofenadine, Pseudoephedrine

Interactions in our licensed database are recorded against drug classes, not just single drug names. Fexofenadine, Pseudoephedrine is filed under 9 classifications — including organic anion-transporting polypeptide substrates (oatp), alpha-adrenergic agonists, stimulant drugs. Ash has documented interactions with 2 drug classes — the most serious being antidiabetes drugs (moderate) and antihypertensive drugs (moderate) — and none of Fexofenadine, Pseudoephedrine’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

Ash Does Interact With Other Medications

Ash has 258 moderate known drug interactions in our database — Fexofenadine, Pseudoephedrine isn’t one of them. If you take anything else, check it against the full list below.

Moderate 258 No known interaction 2,572 (incl. Fexofenadine, Pseudoephedrine)
Taking anything else?

Check Another of Your Medications Against Ash

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

How to take them

Some Fexofenadine, Pseudoephedrine Products Have a Food Rule — Ash Should Not Break It

At least one FDA label for a product containing Fexofenadine, Pseudoephedrine says to take it on an empty stomach. Most supplements — Ash included — are taken with a meal, so the easy mistake is swallowing both together at breakfast. Where that rule applies, keep Fexofenadine, Pseudoephedrine on its own and move Ash to a meal later in the day.

This may not be true of your version. Food instructions belong to the product, not the ingredient: two Fexofenadine, Pseudoephedrine 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.

Directions do not divide, crush, chew or dissolve the tablet; swallow tablet whole adults and children 12 years of age and over take 1 tablet with a glass of water every 24 hours on an empty stomach; do not take more than 1 tablet in 24 hours children under 12 years of age do not use adults 65 years of age and older ask a doctor consumers with kidney disease ask a doctor

From the Dosage and Administration section of the FDA label we read for Fexofenadine, Pseudoephedrine — where that label names a specific product, the instruction is that product's.

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 Fexofenadine, Pseudoephedrine

This page covers Ash only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Fexofenadine, Pseudoephedrine page lists 188 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Apple (major), Ephedra (major), Grapefruit (major) and Peyote (major).

By severity: 9 major · 140 moderate · 39 minor.

From our pharmacist’s overview on the Fexofenadine, Pseudoephedrine page

“The person reaching for Allegra D (fexofenadine with pseudoephedrine) is congested, itchy, and probably washing the tablet down with juice or coffee, which is exactly where the trouble starts. This combination deserves genuine care.”

Reviewed by 2 · Jul 18, 2026

Open the Fexofenadine, Pseudoephedrine interaction page

One more smart check

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

We hold 8 real supplement products containing Ash, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Ash. Even though Ash itself has no known interaction with Fexofenadine, Pseudoephedrine, 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 Ash and Fexofenadine, Pseudoephedrine 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 Ash
Steady interest

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

29 days ago today
Medication Fexofenadine, Pseudoephedrine
Top 25%

#599 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 Ash reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Ash and Fexofenadine, Pseudoephedrine 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 Ash

What is Ash?

Ash
  • Joint pain and arthritis
  • Fever
  • Constipation
  • Fluid retention (diuretic)
  • Bladder and urinary complaints
  • Weight management and blood sugar

Ash (Fraxinus excelsior and related species) is a tree whose leaves, bark, and seeds have a long history in folk medicine for arthritis, fever, and fluid retention. Solid human evidence is limited for nearly all of these uses, so it should not replace proven treatments. Talk with your pharmacist or doctor before using it, especially if you are pregnant, breastfeeding, or taking other medicines.

Fraxinus excelsior · Oleaceae · Leaves, bark, and seeds · Tea, dried leaf, capsules, tinctures, extracts

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

Ash: dosing

There is no well-established standard dose for ash. Amounts vary widely between teas, tinctures, capsules, and extracts.If you choose to use an ash product, follow the directions on the label and do not exceed them.

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

Read the full Ash monograph & all interactions
Keep checking

Other Drugs & Ash

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

0Major
258Moderate
0Minor
2,571No known interaction
258 Moderate 2,571 No interaction
Moderate

258 interactions

Showing 60 of 258 moderate interactions — see all 258 on the Ash page.

No interaction 2,571 drugs checked — show the list

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

Showing the 60 most looked-up of 2,571 medications checked with no known interaction — see the full Ash list.

See the full Ash interactions page
See every supplement checked against Fexofenadine, Pseudoephedrine, ranked by severity
Evidence & sources

Ash References

The 3 references that drive our Ash 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. Zulet MA, Navas-Carretero S, Lara y Sánchez D, et al. A Fraxinus excelsior L. seeds/fruits extract benefits glucose homeostasis and adiposity related markers in elderly overweight/obese subjects: a longitudinal, randomized, crossover, double-blind,
  2. Montó F, Arce C, Noguera MA, et al. Action of an extract from the seeds of Fraxinus excelsior L. on metabolic disorders in hypertensive and obese animal models. Food Funct. 2014;5(4):786-96. PubMed
  3. Visen P, Saraswat B, Visen A, et al. Acute effects of Fraxinus excelsior L. seed extract on postprandial glycemia and insulin secretion on healthy volunteers. J Ethnopharmacol. 2009;126(2):226-32. 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 Ash and Fexofenadine, Pseudoephedrine Together: Common Questions

Is it safe to take Ash with Fexofenadine, Pseudoephedrine?
We do not list a known interaction between Ash and Fexofenadine, Pseudoephedrine. 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 Ash and Fexofenadine, Pseudoephedrine at the same time of day?
At least one FDA label for a product containing Fexofenadine, Pseudoephedrine says to take it on an empty stomach, and supplements are usually taken with a meal — so taking them together at breakfast is the easy mistake. Where that applies, keep Fexofenadine, Pseudoephedrine on its own and move Ash to a meal later in the day. Food instructions belong to the product rather than the ingredient, so check the directions on your own box. This is about absorption, not an interaction.
How was the Ash and Fexofenadine, Pseudoephedrine combination checked?
Interactions in our licensed database are recorded against drug classes. Fexofenadine, Pseudoephedrine is filed under 9 classifications, and Ash has documented interactions with 2 drug classes — none of Fexofenadine, Pseudoephedrine'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 Ash interact with any other medications?
Yes. Ash has 258 documented drug interactions in our database — Fexofenadine, Pseudoephedrine 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 Fexofenadine, Pseudoephedrine interact with any supplements?
Yes. Fexofenadine, Pseudoephedrine has documented interactions with 188 supplements in our database — Ash is not one of them. The Fexofenadine, Pseudoephedrine 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

Ash monograph Uses, safety profile, and every drug interaction in one place Fexofenadine, Pseudoephedrine supplement interactions Every supplement checked against Fexofenadine, Pseudoephedrine, 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 3 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Fexofenadine, Pseudoephedrine and 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.