Medication interaction hub

What Supplements Interact with Fidaxomicin?

Fidaxomicin brand name: Dificid. Every interaction below applies to the brands too.

92 Interactions 3 Major 71 Moderate 18 Minor
Curated & coded by · Clinical Pharmacist · Updated October 4, 2026

Drug–supplement interaction data sourced from Natural Medicines Pro, the licensed clinical database from TRC Healthcare / Therapeutic Research, with additional analysis by the HelloPharmacist Pharmacist Team. Our sources · Editorial policy

What is this page for?

One answer, for one medication: what supplements and herbal products interact with Fidaxomicin? Every vitamin, herb, and supplement ingredient we’ve checked against it is on this page, ranked by severity, each linking to the full report for that exact pair.

This page covers supplement interactions only — to check Fidaxomicin against your other medications, use the drug–drug interaction checker. Educational information from our licensed clinical databases, not medical advice. Our editorial policy

HelloPharmacist Bottom Line
Our Pharmacist Explains
What is this? The interaction data in the HelloPharmacist supplement database is licensed from Natural Medicines Pro by TRC Healthcare (Therapeutic Research). HelloPharmacist pharmacists often add our own analysis and context on top of that licensed data — such as this Bottom Line summary and the notes on individual interaction pages — and any such commentary is noted as ours.

If you are taking fidaxomicin (Dificid) for a Clostridioides difficile infection, supplements are not a side issue, because anything that weakens this drug risks letting a hard-to-treat infection come back. Three entries rated major top my concerns. Activated charcoal can bind medicines in the gut and cut your exposure to them. St. John's wort can lower levels of drugs moved by the transporter P-glycoprotein, this one included. And oleander may become more dangerous alongside a macrolide-type antibiotic like fidaxomicin.

Most of the rest run the opposite way. Dozens are probiotic strains the antibiotic can kill if swallowed at the same time, weakening the probiotic rather than the drug, and a smaller cluster of fibers and charcoal products can blunt absorption of oral medicines. Spacing doses well apart handles much of this. The full list runs to 92 ingredients, 71 of them moderate and 18 minor, and most of those are timing problems, not dangers.

— , Clinical Pharmacist · July 18, 2026

Major 3 Moderate 71 Minor 18 No known interaction 1,360

This box checks one ingredient at a time (like turmeric or magnesium). Taking a supplement product with a whole label of ingredients? Search the product instead — we check every ingredient on it ↓

Top Ingredient Interactions

Fidaxomicin: Top Interactions at a Glance

The most significant Fidaxomicin supplement & herbal interactions, colored by severity. Tap any ingredient to open the full report for that pair.

Showing the 12 highest-ranked of 92 interacting ingredients — plus 1,360 more checked with no known interaction. See the complete ranked list.

Start here

The Major Interactions to Know About

The most clinically significant Fidaxomicin + supplement combinations in our database, best-documented first. Open any card for the full report.

Major Likelihood Probable Activated Charcoal + Fidaxomicini

Activated charcoal reduces systemic exposure to many drugs, including those that undergo enterohepatic recirculation, regardless of the route of administration.

Read the full interaction Major Likelihood Probable Oleander + Fidaxomicini

Theoretically, macrolide antibiotics may increase the risk of oleander toxicity.

Read the full interaction Major Likelihood Probable St. John's Wort + Fidaxomicini

St.

Read the full interaction
The complete list

Every Supplement Checked Against Fidaxomicin

All 1,452 ingredients in our database, ranked by severity — 92 with a Fidaxomicin interaction on file and 1,360 with none found. Filter by severity or search any ingredient; hover the for what each ingredient is.

Looking for an interaction with a specific supplement product? Search products instead ↓

Straight answers

Can You Take It With Fidaxomicin?

One-line answers, one card per combination — scroll through today’s 20 and tap any card for the full report. A different set rotates in daily until every combination has had its turn.

Can you take Activated Charcoal with Fidaxomicin?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. Activated charcoal reduces systemic exposure to many drugs, including those that undergo enterohepatic recirculation, regardless of the rout...

Full Activated Charcoal + Fidaxomicin answer

Can you take Oleander with Fidaxomicin?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. Theoretically, macrolide antibiotics may increase the risk of oleander toxicity.

Full Oleander + Fidaxomicin answer

Can you take St. John's Wort with Fidaxomicin?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. St.

Full St. John's Wort + Fidaxomicin answer

Can you take Bacillus Coagulans with Fidaxomicin?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking antibiotics with Bacillus coagulans might decrease the effectiveness of B.

Full Bacillus Coagulans + Fidaxomicin answer

Can you take Bacillus Subtilis with Fidaxomicin?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking Bacillus subtilis with antibiotic drugs might decrease the effectiveness of B.

Full Bacillus Subtilis + Fidaxomicin answer

Can you take Bifidobacterium Animalis Subsp. Lactis with Fidaxomicin?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking Bifidobacterium lactis with antibiotic drugs might decrease the effectiveness of B.

Full Bifidobacterium Animalis Subsp. Lactis + Fidaxomicin answer

Can you take Bifidobacterium Bifidum with Fidaxomicin?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking Bifidobacterium.

Full Bifidobacterium Bifidum + Fidaxomicin answer

Can you take Bifidobacterium Breve with Fidaxomicin?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking Bifidobacterium breve with antibiotic drugs might decrease the effectiveness of B.

Full Bifidobacterium Breve + Fidaxomicin answer

Can you take Bifidobacterium Longum with Fidaxomicin?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking Bifidobacterium longum with antibiotic drugs might decrease the effectiveness of B.

Full Bifidobacterium Longum + Fidaxomicin answer

Can you take Coffee Charcoal with Fidaxomicin?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Coffee charcoal can reduce the absorption of orally administered drugs and should be separated from oral drug administration by at least two...

Full Coffee Charcoal + Fidaxomicin answer

Can you take European Mandrake with Fidaxomicin?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, concurrent use might increase absorption of some drugs because of inhibited gastrointestinal (GI) motility caused by European...

Full European Mandrake + Fidaxomicin answer

Can you take Fermented Milk with Fidaxomicin?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, antibiotic drugs might decrease the effectiveness of fermented milk.

Full Fermented Milk + Fidaxomicin answer

Can you take Glucomannan with Fidaxomicin?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, glucomannan may decrease absorption of drugs taken orally.

Full Glucomannan + Fidaxomicin answer

Can you take Goldenseal with Fidaxomicin?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, goldenseal might increase or decrease serum levels of P-glycoprotein (P-gp) substrates.

Full Goldenseal + Fidaxomicin answer

Can you take Lacticaseibacillus Casei with Fidaxomicin?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking Lacticaseibacillus casei with antibiotic drugs might decrease the effectiveness of L.

Full Lacticaseibacillus Casei + Fidaxomicin answer

Can you take Lacticaseibacillus Paracasei with Fidaxomicin?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking Lacticaseibacillus paracasei with antibiotic drugs might decrease the effectiveness of L.

Full Lacticaseibacillus Paracasei + Fidaxomicin answer

Can you take Lacticaseibacillus Rhamnosus with Fidaxomicin?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking Lacticaseibacillus rhamnosus with antibiotic drugs might decrease the effectiveness of L.

Full Lacticaseibacillus Rhamnosus + Fidaxomicin answer

Can you take Lactiplantibacillus Pentosus with Fidaxomicin?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking Lactiplantibacillus pentosus with antibiotic drugs might decrease the effectiveness of L.

Full Lactiplantibacillus Pentosus + Fidaxomicin answer

Can you take Lactiplantibacillus Plantarum with Fidaxomicin?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking Lactiplantibacillus plantarum with antibiotic drugs might decrease the effectiveness of L.

Full Lactiplantibacillus Plantarum + Fidaxomicin answer

Can you take Lactobacillus Acidophilus with Fidaxomicin?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking Lactobacillus acidophilus with antibiotic drugs might decrease the effectiveness of L.

Full Lactobacillus Acidophilus + Fidaxomicin answer
Read the list like a pharmacist

What Severity, Likelihood & Evidence Mean

Severity — How Serious It Can Be

  • Major. Clinically significant; generally best avoided, or used only under direct professional supervision.
  • Moderate. May need monitoring, a dose adjustment, or separating the times you take each one.
  • Minor. Generally not clinically significant, but still worth noting and mentioning to your pharmacist.
  • No known interaction. Checked against our sources with nothing documented — not the same as proven safety.

Likelihood — How Well It’s Documented

  • Likely. Well-controlled human studies have demonstrated the likely existence of this interaction
  • Probable. Interaction 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.
  • Possible. Interaction 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
  • Unlikely. Interaction has been demonstrated in animal or in lab research but has been shown not to occur in humans.

Where This Data Comes From

  • Interaction records are evidence-graded and sourced from the Natural Medicines database (TRC Healthcare), the same reference used by pharmacists and hospitals.
  • Each entry links to a full report with the clinical detail, likelihood, evidence level, and citations for that exact combination.
  • Content is reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

How Does Our Interaction Checker Work?

Behind every verdict on this page is a category system. Our source database doesn’t document supplement interactions drug-by-drug — it documents them against groups of medications that behave the same way (for example, “drugs processed by the CYP3A4 liver enzyme” or “blood-thinning medications”).

So the check works in three steps: (1) Fidaxomicin is classified into the pharmacology categories it belongs to, (2) every supplement interaction documented against any of those categories is inherited by Fidaxomicin, and (3) each ingredient keeps its own severity, likelihood, and evidence grades from the underlying record. That’s why one supplement can carry several records for one drug — it may interact through more than one category.

Fidaxomicin sits in 4 interaction categories. Open any one to see what the group means:

P-Glycoprotein Substrates 37 ingredients

A drug-transport group: these medications are moved in and out of cells by the P-glycoprotein pump. Supplements that affect the pump can change how much of the drug is absorbed or kept in the body.

37 of the supplement ingredients on this page reach Fidaxomicin through this category.

Antibiotic Drugs 27 ingredients

A pharmacology grouping from our source database: medications in this group share a property that certain supplements are known to interact with, so an interaction documented for the group applies to every drug in it.

27 of the supplement ingredients on this page reach Fidaxomicin through this category.

Oral Drugs 17 ingredients

A pharmacology grouping from our source database: medications in this group share a property that certain supplements are known to interact with, so an interaction documented for the group applies to every drug in it.

17 of the supplement ingredients on this page reach Fidaxomicin through this category.

Macrolide Antibiotics 11 ingredients

A pharmacology grouping from our source database: medications in this group share a property that certain supplements are known to interact with, so an interaction documented for the group applies to every drug in it.

11 of the supplement ingredients on this page reach Fidaxomicin through this category.

About Fidaxomicin

Fidaxomicin is a macrolide antibiotic used to treat diarrhea caused by C. difficile bacteria.

Generic name: Fidaxomicin  ·  Brand name: Dificid.

See the full Fidaxomicin drug information

Related: does Fidaxomicin deplete any nutrients?

Fidaxomicin has 7 reported nutrient associations in the research literature — see the Fidaxomicin nutrient depletion report.

Check a real product

Take a Supplement Product? Check the Whole Bottle Against Fidaxomicin

Most supplements are combination products — and the interaction may come from an ingredient you didn’t buy it for. Search any product below (or scan its label) and we’ll check every ingredient on it against Fidaxomicin.

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Pharmacist Counseling Corner

Fidaxomicin & Supplements: Common Questions

What supplements interact with Fidaxomicin?
In our interaction database, 92 supplement and herbal ingredients have an interaction with Fidaxomicin on file — 3 rated major, 71 moderate, and 18 minor. That number sounds scarier than it is: severity matters far more than the count, which is why the list on this page is ranked instead of alphabetical. Start at the top. The highest-ranked right now: Activated Charcoal, Oleander, St. John's Wort.
Which Fidaxomicin supplement interactions are the most serious?
The 3 major-rated combinations — led by Activated Charcoal, Oleander and St. John's Wort — deserve real caution: these are the ones generally best avoided, or used only with your prescriber watching. If you take any of them today, don't panic and don't stop anything abruptly — call your pharmacist first. Jump to the ranked list.
Can I take vitamins or supplements while on Fidaxomicin?
That depends entirely on which supplement. The honest answer for Fidaxomicin is in the ranked list above — and if what you take is a combination product with a dozen ingredients, don't check them one by one: photograph the label with our scanner and we'll check the whole thing at once. Try the label scanner or the interaction checker.
Do brands like Dificid have the same supplement interactions as Fidaxomicin?
Yes — Dificid all contain Fidaxomicin, so everything on this page applies to them equally. Interactions belong to the active drug, never to the brand on the box; the same is true of generics.
Where do these interaction ratings come from?
Every rating comes from the Natural Medicines database — the same evidence-graded reference pharmacists and hospitals use — and each interaction carries three separate grades: severity (how bad it can be), likelihood (how well it's documented in studies and case reports), and an evidence level. Our pharmacists review the content; we never let an AI decide an interaction. See how to read the ratings and our editorial policy.
Does Fidaxomicin deplete any vitamins or nutrients?
It might — Fidaxomicin has 7 reported nutrient-depletion associations in the research literature, which is a different question from interactions: instead of a supplement changing the drug, the drug may lower a nutrient over time. See the Fidaxomicin nutrient depletion report for the specifics and what to discuss with your pharmacist.
What about Fidaxomicin and my other medications?
This page covers Fidaxomicin against supplements and herbal ingredients. Checking Fidaxomicin against your other prescription or OTC medications is a different tool — our drug interaction checker covers that side. Head to the drug–drug interaction checker, or read the full Fidaxomicin drug information.

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

Where next

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Sourcing

Where This Data Comes From — and Why You Can Trust It

🧪 Licensed clinical database

Every interaction verdict on this page comes from Natural Medicines Pro (TRC Healthcare / Therapeutic Research) — the same evidence-graded reference used by pharmacists and hospitals. We license this data directly; we do not scrape it, and no AI invents an interaction.

🧑‍⚕️ Pharmacist review

This page is curated and coded by , Clinical Pharmacist, with additional analysis by the HelloPharmacist Pharmacist Team. Editorial commentary is ours; the licensed interaction records are shown as sourced.

🔄 Kept current

Our interaction database refreshes on a weekly cycle, and this page re-checks the live database every time it’s rebuilt — what you see reflects the database as of October 4, 2026.

🔍 Full transparency

How every dataset on this site is sourced, licensed, and updated is documented publicly: our data sources · editorial policy · how we use AI.

Educational information, not medical advice. An interaction being on file does not mean it will happen to you — and absence of one is not proof of safety. Never start or stop a medication or supplement without talking to your pharmacist or doctor.