Drug & supplement interaction

Polypodium Leucotomos + Oxybutynin

Oxybutynin brand names: Ditropan, Ditropan XL, Oxybutynin, Oxytrol, Anturol, and others.

Minor Interaction
Medically reviewed by · Updated September 2026
The bottom line Minor

Polypodium Leucotomos has a minor interaction with Oxybutynin. Theoretically, Polypodium leucotomos might increase levels of drugs metabolized by CYP3A4.

Read the full interaction report
SeverityMinor
LikelihoodUnlikely
EvidenceB
What do Severity, Likelihood & Evidence mean?
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Interaction report

Polypodium Leucotomos and Oxybutynin

Here is the interaction we found between these two, with the evidence behind it.

Minor

CYTOCHROME P450 3A4 (CYP3A4) SUBSTRATES

Why this applies to Oxybutynin

Oxybutynin falls under CYTOCHROME P450 3A4 (CYP3A4) SUBSTRATES — the group Polypodium Leucotomos interacts with.

Theoretically, Polypodium leucotomos might increase levels of drugs metabolized by CYP3A4.
In vitro and animal research suggests that Polypodium leucotomos can decrease the metabolism of midazolam by a mechanism possibly related to the inhibition of CYP3A4. However, a small study in humans suggests that taking Polypodium leucotomos with midazolam does not affect the metabolism of midazolam.
Severity Minor Likelihood Unlikely Evidence B

Interaction has been demonstrated in animal or in lab research but has been shown not to occur in humans..

Dr. Brian Staiger, PharmD, BCPS
Dr. Brian Staiger explains PharmD, Clinical Pharmacist

Here's the gist for these two together. Your body relies on an enzyme called CYP3A4 to break down oxybutynin. In test tube and animal studies, polypodium leucotomos seemed to slow that enzyme down a bit, which in theory could let oxybutynin build up. If that happened, you might notice more of its usual anticholinergic side effects, things like dry mouth, constipation, blurry vision, dizziness, or feeling overheated.

The reassuring part: this is mostly theoretical. When researchers actually tested the fern extract in people using a similar CYP3A4 medication, they didn't see a real change. It's rated minor and unlikely. Still, since everyone reacts differently, it's worth a quick mention to your pharmacist or doctor before you start the supplement.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Shinya K, Nishimura Y, Ryu K, et al. Short-term administration of Polypodium leucotomos extract does not inhibit CYP3A4-mediated metabolism of midazolam in healthy subjects: an open-label, two-period, fixed-sequence study. Int J Dermatol 2022.

What These Ratings Mean

Every interaction above is graded three ways — here’s the key to each label.

Severity how clinically significant the interaction is
Major

Clinically significant. Avoid the combination, or use only under close professional supervision.

Moderate

Usually worth avoiding or managing — may need monitoring, a dose change, or timing apart.

Minor

Generally not serious. Be aware of it and mention it to your pharmacist.

Likelihood how strong the evidence is that the interaction actually happens in people
  • LikelyWell-controlled human studies have demonstrated the likely existence of this interaction.
  • ProbableInteraction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
  • PossibleInteraction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists.
  • UnlikelyInteraction has been demonstrated in animal or in lab research but has been shown not to occur in humans.
Evidence the quality of the studies behind the rating (graded A–D)
  • AHigh-quality meta-analysis (quantitative systematic review).
  • BCase-control study.
  • CConsensus.
  • DAnecdotal evidence.

These ratings are for information only. Never start, stop, or otherwise change your therapy before speaking with your provider.

Keep it in perspective

Polypodium Leucotomos Also Interacts With Other Medications

Polypodium Leucotomos has 642 minor known drug interactions in our database — the Oxybutynin one above is one of them. If you take anything else, check it against the full list below.

Minor 642 No known interaction 2,188 (incl. Oxybutynin)
Taking anything else?

Check Another of Your Medications Against Polypodium Leucotomos

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

From our Q&A

Questions About Polypodium Leucotomos or Oxybutynin

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

This page covers Polypodium Leucotomos only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Oxybutynin page lists 165 supplements it has a documented interaction with, worst first, each one explained.

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

By severity: 5 major · 116 moderate · 44 minor.

From our pharmacist’s overview on the Oxybutynin page

“Oxybutynin (Ditropan, Oxytrol, Gelnique) is an anticholinergic for overactive bladder, and its supplement interactions deserve genuine care rather than a quick skim. Most of the list comes down to drug levels: grapefruit juice can push oxybutynin higher and intensify its side effects, while St.”

Reviewed by 2 · Jul 18, 2026

Open the Oxybutynin interaction page

One more smart check

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

We hold 26 real supplement products containing Polypodium Leucotomos, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Polypodium Leucotomos. Your product may carry other ingredients that interact with Oxybutynin too, on top of Polypodium Leucotomos — and those would not show on this page. Find your product and we’ll check every ingredient on its label:

How much people look this up

Where Polypodium Leucotomos and Oxybutynin 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 Polypodium Leucotomos
Steady interest

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

29 days ago today
Medication Oxybutynin
Steady interest

#1,780 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.

Supplement

About Polypodium Leucotomos

What is Polypodium Leucotomos?

  • Sun sensitivity and sunburn protection
  • Skin conditions like vitiligo and melasma
  • Polymorphic light eruption
  • Skin aging and photoaging
  • Atopic dermatitis support

Polypodium leucotomos is a fern extract taken by mouth, mostly studied as an add-on to (not a replacement for) sunscreen and for certain light-triggered skin conditions. Some early research is promising for reducing sun sensitivity, but the evidence is still limited and it should not replace standard sun protection. Talk with your pharmacist or doctor before starting it.

Read the full Polypodium Leucotomos monograph & all interactions
Medication

About Oxybutynin

What Is Oxybutynin Used For?

Brand names: Ditropan, Ditropan XL, Oxybutynin, Oxytrol, Anturol, Gelnique

Oxybutynin treats overactive bladder — including the sudden urge to urinate, leaking before you can reach the bathroom (urge incontinence), and going too frequently. Extended-release tablets (Oxybutynin Chloride) and immediate-release tablets and oral solution (Oxybutynin Chloride) are used for these symptoms. Oxytrol is approved for overactive bladder in men; Oxytrol for Women is approved for overactive bladder in women aged 18 and older.

Extended-release tablets (Oxybutynin Chloride) are also approved for children 6 years and older who have bladder overactivity caused by a neurological condition, such as spina bifida. Immediate-release tablets and oral solution (Oxybutynin Chloride) are indicated for bladder instability symptoms — including urgency, frequency, urinary leakage, and painful urination — in patients with neurogenic bladder conditions.

See full Oxybutynin drug information
Keep checking

Other Drugs & Polypodium Leucotomos

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

0Major
0Moderate
642Minor
2,187No known interaction
642 Minor 2,187 No interaction
Minor

642 interactions

Showing 60 of 642 minor interactions — see all 642 on the Polypodium Leucotomos page.

No interaction 2,187 drugs checked — show the list

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

Showing the 60 most looked-up of 2,187 medications checked with no known interaction — see the full Polypodium Leucotomos list.

See the full Polypodium Leucotomos interactions page
See every supplement checked against Oxybutynin, ranked by severity
Sources

Sources & How We Checked

Interaction details are evidence-graded and sourced from the Natural Medicines database. The medication overview comes from MedlinePlus.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

Keep exploring
Polypodium Leucotomos monograph › Uses, safety, and every drug interaction in one place Oxybutynin supplement interactions › Every supplement checked against Oxybutynin, ranked by severity Oxybutynin drug information › The full plain-English guide to this medication Supplement interaction checker › Check any supplement or product against your medications Browse medications A–Z › Every drug we've checked against herbs & supplements Ask a pharmacist › Free, personal answer from our licensed team
Pharmacist Counseling Corner

Taking Polypodium Leucotomos and Oxybutynin Together: Common Questions

Can you take Polypodium Leucotomos with Oxybutynin?
There is only a minor interaction, which is usually not serious. Read the full details on this page and confirm with your pharmacist before combining them.
How serious is the Polypodium Leucotomos and Oxybutynin interaction?
We rate it Minor. This interaction is generally not clinically significant, but it remains worth noting and discussing with your pharmacist.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

Still Have a Question About Oxybutynin and Polypodium Leucotomos?

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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.