Drug & supplement interaction

Myrrh + Fexofenadine

Fexofenadine brand name: Allegra.

No Known Interaction
Medically reviewed by · Updated July 2026 · Pair last verified Sep 27, 2026
The bottom line No known interaction

We found no known interaction between Myrrh and Fexofenadine 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.

Know someone taking this? Share
Facebook Post Reddit Email
On this page
Interaction report

Myrrh and Fexofenadine

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 and Myrrh 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.

Myrrh safety at a glance

Myrrh overall Use caution Likely fine for short-term topical or mouth-rinse use, but oral safety is not well studied.
Pregnancy Likely Unsafe When used orally. Myrrh stimulates uterine tone and blood flow and may have an abortifacient effect. There is insufficient reliable information available about... Read the full pregnancy detail
Breastfeeding Avoid Not enough safety information is available, so it is best avoided.

Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center) — the full detail is in the Special populations card below. Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

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

Why No Interaction Is Listed for Fexofenadine

Interactions in our licensed database are recorded against drug classes, not just single drug names. Fexofenadine is filed under 6 classifications — including organic anion-transporting polypeptide substrates (oatp), p-glycoprotein substrates, seizure threshold lowering drugs. Myrrh has documented interactions with 2 drug classes — the most serious being antidiabetes drugs (moderate) and warfarin (coumadin) (moderate) — and none of Fexofenadine’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

Myrrh Does Interact With Other Medications

Myrrh has 88 moderate known drug interactions in our database — Fexofenadine isn’t one of them. If you take anything else, check it against the full list below.

Moderate 88 No known interaction 2,742 (incl. Fexofenadine)
Taking anything else?

Check Another of Your Medications Against Myrrh

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

What to actually watch for

What Myrrh Itself Has Been Linked To

This is not an interaction — nothing below involves Fexofenadine. It is the side-effect record for Myrrh on its own, from the licensed Natural Medicines monograph. If something new turns up after you add Myrrh, this list is the first place to look.

  • Itching / Swelling Additional detail

    “Orally, myrrh has been reported to cause severe allergic skin reactions, with redness, swelling, and itching, in two case reports of individuals using oral traditional Chinese medicines containing myrrh.”

    Myrrh · Natural Medicines adverse-effect record, reported in pruritus.

    1 source cited
    1. 101114. Xu YY, Li L, Xuan L, Guan K. Patch test diagnosis of non-immediate cutaneous reaction to myrrh following oral intake of a traditional Chinese medicine decoction. Contact Dermatitis. 2019;80(2):135-136. PubMed
  • Stomach pain Additional detail

    “Severe lower abdominal pain has been reported in a pregnant woman drinking myrrh resin dissolved in 500 mL of water twice daily as prescribed by a traditional practitioner. This adverse effect resolved one day after discontinuing myrrh. The investigators suggest that this acute abdominal pain was related to myrrh's activity as a uterine stimulant.”

    Myrrh · Natural Medicines adverse-effect record, reported in pain.

    1 source cited
    1. 93645. Al-Jaroudi D, Kaddour O, Al-Amin N. Risks of myrrh use in pregnancy. JBRA Assist Reprod 2016;20(4):257-8.
  • Diarrhea Additional detail

    “Orally, myrrh may cause diarrhea in some patients when taken at doses of 2-4 grams (12,19).”

    Myrrh · Natural Medicines adverse-effect record, reported in diarrhea.

    2 sources cited
    1. 12. McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
    2. 19. Brinker F. Herb Contraindications and Drug Interactions. 2nd ed. Sandy, OR: Eclectic Medical Publications, 1998.
  • A skin rash Additional detail

    “Topically, myrrh has been reported to cause dermatitis (6).”

    Myrrh · Natural Medicines adverse-effect record, reported in dermatitis.

    1 source cited
    1. 6. The Review of Natural Products by Facts and Comparisons. St. Louis, MO: Wolters Kluwer Co., 1999.

Everything above comes from the Natural Medicines adverse-effect record for Myrrh — expand a row for the licensed statement it rests on. We haven’t matched Fexofenadine to its FDA label in our system yet, so we can’t compare its own side-effect list here — the leaflet that comes with your prescription is the authoritative list for Fexofenadine.

Special populations

Myrrh in Pregnancy & Breastfeeding

Pregnancy Likely Unsafe

When used orally. Myrrh stimulates uterine tone and blood flow and may have an abortifacient effect. There is insufficient reliable information available about the safety of the topical use of myrrh during pregnancy.

DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.© 2026 Therapeutic Research Center

From our Q&A

Questions About Myrrh or Fexofenadine

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Myrrh or Fexofenadine, 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 Fexofenadine

This page covers Myrrh only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Fexofenadine page lists 154 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Apple (major), Grapefruit (major), St. John's Wort (major) and Sweet Orange (major).

By severity: 5 major · 111 moderate · 38 minor.

From our pharmacist’s overview on the Fexofenadine page

“An over-the-counter allergy pill sounds like the last place serious interactions would hide, but fexofenadine (Allegra) has 154 supplements and foods on file, and the five rated major deserve real attention before you combine it with much of anything else. Two of those five sit in most refrigerators.”

Reviewed by 2 · Jul 18, 2026

Open the Fexofenadine interaction page

One more smart check

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

We hold 458 real supplement products containing Myrrh, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Myrrh. Even though Myrrh itself has no known interaction with Fexofenadine, 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 Myrrh and Fexofenadine 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 Myrrh
Top 25%

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

29 days ago today
Medication Fexofenadine
Top 25%

#369 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 Myrrh reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 27, 2026. The Myrrh and Fexofenadine records this page draws on were last updated July 11, 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 Myrrh

What is Myrrh?

Myrrh
  • Mouth and gum irritation
  • Sore throat
  • Minor wound and skin care
  • Digestive upset
  • Antimicrobial/antiseptic uses

Myrrh is a fragrant gum resin from Commiphora trees that has long been used in mouthwashes, throat remedies, and skin care. Modern evidence for most of its uses is limited and comes mostly from laboratory or small studies, so it should be viewed as a traditional remedy rather than a proven treatment. Talk with your pharmacist or doctor before using it, and avoid it during pregnancy.

Commiphora myrrha · Burseraceae · Gum resin (and essential oil distilled from the resin) · Tincture, mouthwash/gargle, capsules, powder, essential oil, topical preparations, incense

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

Myrrh: dosing

There is no well-established standard dose of myrrh for any condition. Strengths vary widely between tinctures, mouthwashes, capsules, and essential oils.The safest approach is to follow the directions on the product label and not exceed them. Mouthwashes and gargles are usually diluted and not swallowed. Essential oil should never be swallowed and must be diluted before applying to the skin.

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

Read the full Myrrh monograph & all interactions
Medication

About Fexofenadine

What Is Fexofenadine Used For?

Brand name: Allegra

Fexofenadine temporarily relieves symptoms of hay fever (seasonal allergic rhinitis) and other upper respiratory allergies, including runny nose, sneezing, itchy or watery eyes, and itching of the nose or throat.

Several products — including Allegra Hives 24hr tablets — are specifically used to reduce hives (urticaria) and relieve the itching that comes with them. Keep in mind that fexofenadine will not prevent hives or stop an allergic skin reaction from happening in the first place.

Most-Reported Side Effects for Fexofenadine

From FAERS, the FDA’s public side-effect reporting system (40,472 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Fatigue 1,945 reports
Nausea 1,876 reports
Headache 1,870 reports
Pruritus 1,733 reports
Diarrhea 1,622 reports
See full Fexofenadine drug information
Keep checking

Other Drugs & Myrrh

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

0Major
88Moderate
0Minor
2,741No known interaction
88 Moderate 2,741 No interaction
Moderate

88 interactions

Showing 60 of 88 moderate interactions — see all 88 on the Myrrh page.

No interaction 2,741 drugs checked — show the list

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

Showing the 60 most looked-up of 2,741 medications checked with no known interaction — see the full Myrrh list.

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

Myrrh References

The 8 references that drive our Myrrh 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. Newall CA, Anderson LA, Philpson JD. Herbal Medicine: A Guide for Healthcare Professionals. London, UK: The Pharmaceutical Press, 1996.
  2. The Review of Natural Products by Facts and Comparisons. St. Louis, MO: Wolters Kluwer Co., 1999.
  3. McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
  4. Brinker F. Herb Contraindications and Drug Interactions. 2nd ed. Sandy, OR: Eclectic Medical Publications, 1998.
  5. Al Faraj S. Antagonism of the anticoagulant effect of warfarin caused by the use of Commiphora molmol as a herbal medication: a case report. Ann Trop Med Parasitol 2005;99:219-20.
  6. Al-Jaroudi D, Kaddour O, Al-Amin N. Risks of myrrh use in pregnancy. JBRA Assist Reprod 2016;20(4):257-8.
  7. Xu YY, Li L, Xuan L, Guan K. Patch test diagnosis of non-immediate cutaneous reaction to myrrh following oral intake of a traditional Chinese medicine decoction. Contact Dermatitis. 2019;80(2):135-136. PubMed
  8. Al-Romaiyan A, Huang GC, Jones P, Persaud S. Commiphora myrrha stimulates insulin secretion from mouse and human islets of Langerhans. J Ethnopharmacol. 2021 Jan 10;264:113075. 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 Myrrh and Fexofenadine Together: Common Questions

Is it safe to take Myrrh with Fexofenadine?
We do not list a known interaction between Myrrh and Fexofenadine. 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 Myrrh and Fexofenadine combination checked?
Interactions in our licensed database are recorded against drug classes. Fexofenadine is filed under 6 classifications, and Myrrh has documented interactions with 2 drug classes — none of Fexofenadine'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 Myrrh interact with any other medications?
Yes. Myrrh has 88 documented drug interactions in our database — Fexofenadine 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 interact with any supplements?
Yes. Fexofenadine has documented interactions with 154 supplements in our database — Myrrh is not one of them. The Fexofenadine 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

Myrrh monograph Uses, safety profile, and every drug interaction in one place Fexofenadine drug information The full plain-English guide to this medication Fexofenadine supplement interactions Every supplement checked against Fexofenadine, 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 8 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Fexofenadine and Myrrh?

Our pharmacists answer your medication & supplement questions — free.

Ask a pharmacist

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.