Drug & supplement interaction

Arum + Tretinoin, Benzoyl Peroxide

Tretinoin, Benzoyl Peroxide brand name: Twyneo.

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 Arum and Tretinoin, Benzoyl Peroxide 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

Arum and Tretinoin, Benzoyl Peroxide

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 Tretinoin, Benzoyl Peroxide and Arum 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.

Arum safety at a glance

Arum overall Avoid The raw plant is toxic and irritating, and safe doses have not been established.
Pregnancy Likely Unsafe When used orally because of its toxicity; avoid using. Read the full pregnancy detail
Breastfeeding Likely Unsafe When used orally because of its toxicity; avoid using. Read the full breastfeeding detail

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 Tretinoin, Benzoyl Peroxide and Arum? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Tretinoin, Benzoyl Peroxide

Interactions in our licensed database are recorded against drug classes, not just single drug names. Tretinoin, Benzoyl Peroxide is filed under 4 classifications — including retinoids, cytochrome p450 2c8 (cyp2c8) substrates, topical drugs. Arum has documented interactions with 1 drug class — the most serious being iron (minor) — and none of Tretinoin, Benzoyl Peroxide’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

Arum Does Interact With Other Medications

Arum has 1 minor known drug interaction in our database — Tretinoin, Benzoyl Peroxide isn’t one of them. If you take anything else, check it against the full list below.

Minor 1 No known interaction 2,829 (incl. Tretinoin, Benzoyl Peroxide)
Taking anything else?

Check Another of Your Medications Against Arum

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

What to actually watch for

What Arum Itself Has Been Linked To

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

  • Swelling / Diarrhea / Vomiting Additional detail

    “Orally, arum has been reported to cause burning of the oral mucous membranes, likely due to its oxalate crystal content. The immediate burning sensation caused by arum is thought to limit its oral intake, possibly reducing the likelihood for arum toxicity. Arum has also been reported to cause bloody vomiting, bloody diarrhea, and swelling of the tongue, lips, and palate in some people (18,32466).”

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

    3 sources cited
    1. 101417. Prakash Raju KNJ, Goel K, Anandhi D, Pandit VR, Surendar R, Sasikumar M. Wild tuber poisoning: Arum maculatum - A rare case report. Int J Crit Illn Inj Sci. 2018;8(2):111-114. PubMed
    2. 18. Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
    3. 32466. Mrvos, R., Dean, B. S., and Krenzelok, E. P. Philodendron/dieffenbachia ingestions: are they a problem? J Toxicol Clin Toxicol 1991;29(4):485-491. PubMed

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

Special populations

Arum in Pregnancy & Breastfeeding

Pregnancy And Lactation Likely Unsafe

When used orally because of its toxicity; avoid using.

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

Everything else you take

See Every Supplement That Interacts With Tretinoin, Benzoyl Peroxide

This page covers Arum only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Tretinoin, Benzoyl Peroxide page lists 35 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Vitamin A (major), African Wild Potato (moderate), Alfalfa (moderate), Angelica Archangelica (moderate) and Arrach (moderate).

By severity: 1 major · 30 moderate · 4 minor.

From our pharmacist’s overview on the Tretinoin, Benzoyl Peroxide page

“Twyneo pairs tretinoin, a vitamin A derivative, with benzoyl peroxide in an acne cream, and its interaction list deserves genuine care. The single major-rated entry among the 35 supplements on file is vitamin A itself; stacking supplements on a drug built from vitamin A can push levels toward toxicity, so that pairing is the one to und…”

Reviewed by 2 · Jul 18, 2026

Open the Tretinoin, Benzoyl Peroxide interaction page

How much people look this up

Where Arum and Tretinoin, Benzoyl Peroxide 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 Arum
Steady interest

#1,125 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Tretinoin, Benzoyl Peroxide
Top 10%

#181 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 Arum reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified October 4, 2026. The Arum and Tretinoin, Benzoyl Peroxide 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 Arum

What is Arum?

Arum
  • Coughs and chest congestion
  • Sore throat
  • Promoting sweating (diaphoretic)
  • Skin and wart remedies (topical folk use)
  • Digestive complaints

Arum is a traditional European plant whose root has been used in folk medicine, but there is essentially no reliable human research to support any health benefit. The raw plant is toxic and irritating because of calcium oxalate crystals, so it should not be eaten or used casually. We do not recommend using Arum as a supplement, especially during pregnancy or breastfeeding.

Arum maculatum · Araceae · Root (tuber), and sometimes leaves · Dried root preparations, tinctures, and traditional folk remedies

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

Arum: dosing

There is no established or standardized safe dose for Arum. Because the plant is toxic and human research is lacking, no trustworthy dosing guidelines exist.We do not recommend taking Arum. If you encounter a product that contains it, do not use it without first checking with a pharmacist or doctor, and never prepare or eat the raw plant yourself.

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

Read the full Arum monograph & all interactions
Keep checking

Other Drugs & Arum

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

0Major
0Moderate
1Minor
2,828No known interaction
1 Minor 2,828 No interaction
Minor

1 interaction

No interaction 2,828 drugs checked — show the list

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

Showing the 60 most looked-up of 2,828 medications checked with no known interaction — see the full Arum list.

See the full Arum interactions page
See every supplement checked against Tretinoin, Benzoyl Peroxide, ranked by severity
Evidence & sources

Arum References

The 3 references that drive our Arum 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. Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
  2. Mrvos, R., Dean, B. S., and Krenzelok, E. P. Philodendron/dieffenbachia ingestions: are they a problem? J Toxicol Clin Toxicol 1991;29(4):485-491. PubMed
  3. Prakash Raju KNJ, Goel K, Anandhi D, Pandit VR, Surendar R, Sasikumar M. Wild tuber poisoning: Arum maculatum - A rare case report. Int J Crit Illn Inj Sci. 2018;8(2):111-114. 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 Arum and Tretinoin, Benzoyl Peroxide Together: Common Questions

Is it safe to take Arum with Tretinoin, Benzoyl Peroxide?
We do not list a known interaction between Arum and Tretinoin, Benzoyl Peroxide. 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 Arum and Tretinoin, Benzoyl Peroxide combination checked?
Interactions in our licensed database are recorded against drug classes. Tretinoin, Benzoyl Peroxide is filed under 4 classifications, and Arum has documented interactions with 1 drug class — none of Tretinoin, Benzoyl Peroxide'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 Arum interact with any other medications?
Yes. Arum has 1 documented drug interaction in our database — Tretinoin, Benzoyl Peroxide 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 Tretinoin, Benzoyl Peroxide interact with any supplements?
Yes. Tretinoin, Benzoyl Peroxide has documented interactions with 35 supplements in our database — Arum is not one of them. The Tretinoin, Benzoyl Peroxide 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

Arum monograph Uses, safety profile, and every drug interaction in one place Tretinoin, Benzoyl Peroxide supplement interactions Every supplement checked against Tretinoin, Benzoyl Peroxide, 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 Tretinoin, Benzoyl Peroxide and Arum?

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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.