Medication interaction hub

What Supplements Interact with Cefdinir?

Cefdinir brand name: Omnicef. Every interaction below applies to the brands too.

60 Interactions 3 Major 46 Moderate 11 Minor
Curated & coded by · Clinical Pharmacist · Updated September 22, 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 Cefdinir? 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 Cefdinir 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.

Cefdinir (Omnicef) is a short-course antibiotic for ear, sinus, throat, and skin infections, and three of its 60 supplement interactions on file are rated major and deserve genuine care. Two herbs, Siberian cocklebur and asarabacca, can damage the kidneys, an added strain nobody needs while fighting an infection. The third, activated charcoal, soaks up medicines in the gut and can leave you with less cefdinir than the infection requires.

The 46 moderate entries mostly run the opposite direction, with cefdinir as the aggressor. Nearly half the full list is probiotics, live bacteria the antibiotic can kill, so space those doses well apart rather than taking them together. A smaller cluster of fibers and charcoals can blunt how much of any oral dose actually absorbs. Eleven minor entries round out the file, but I would treat the kidney-stressing herbs as off limits while this prescription lasts.

— , Clinical Pharmacist · July 18, 2026

Major 3 Moderate 46 Minor 11 No known interaction 1,392

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 ↓

Most Viewed Ingredient Interactions

Cefdinir: Top Interactions at a Glance

The Cefdinir supplement & herbal interactions people checked most in the last 24 hours, colored by severity. Tap any ingredient to open the full report for that pair.

Showing the 12 highest-ranked of 60 interacting ingredients — plus 1,392 more checked with no known interaction. See the complete ranked list.

Start here

The Most-Checked Cefdinir Combinations Today

The Cefdinir + supplement pages people viewed most in the last 24 hours (resets at midnight). Open any card for the full report.

Moderate Likelihood Probable Lactobacillus Acidophilus + Cefdiniri

Theoretically, taking Lactobacillus acidophilus with antibiotic drugs might decrease the effectiveness of L.

Read the full interaction Moderate Likelihood Probable Bifidobacterium Longum + Cefdiniri

Theoretically, taking Bifidobacterium longum with antibiotic drugs might decrease the effectiveness of B.

Read the full interaction Moderate Likelihood Probable Bifidobacterium Bifidum + Cefdiniri

Theoretically, taking Bifidobacterium.

Read the full interaction Moderate Likelihood Probable Bifidobacterium Breve + Cefdiniri

Theoretically, taking Bifidobacterium breve with antibiotic drugs might decrease the effectiveness of B.

Read the full interaction Moderate Likelihood Probable Lactiplantibacillus Plantarum + Cefdiniri

Theoretically, taking Lactiplantibacillus plantarum with antibiotic drugs might decrease the effectiveness of L.

Read the full interaction Moderate Likelihood Probable Lacticaseibacillus Paracasei + Cefdiniri

Theoretically, taking Lacticaseibacillus paracasei with antibiotic drugs might decrease the effectiveness of L.

Read the full interaction
The complete list

Every Supplement Checked Against Cefdinir

All 1,452 ingredients in our database, ranked by severity — 60 with a Cefdinir interaction on file and 1,392 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 Cefdinir?

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 Lactobacillus Acidophilus with Cefdinir?

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 + Cefdinir answer

Can you take Bifidobacterium Longum with Cefdinir?

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 + Cefdinir answer

Can you take Bifidobacterium Bifidum with Cefdinir?

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

Full Bifidobacterium Bifidum + Cefdinir answer

Can you take Bifidobacterium Breve with Cefdinir?

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 + Cefdinir answer

Can you take Lactiplantibacillus Plantarum with Cefdinir?

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 + Cefdinir answer

Can you take Siberian Cocklebur with Cefdinir?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. Siberian cocklebur can adversely affect the kidney.

Full Siberian Cocklebur + Cefdinir answer

Can you take Activated Charcoal with Cefdinir?

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 + Cefdinir answer

Can you take Asarabacca with Cefdinir?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. Asarabacca, a herbaceous plant, is often contaminated with aristolochic acid, a compound known for its nephrotoxic effects.

Full Asarabacca + Cefdinir answer

Can you take Bacillus Coagulans with Cefdinir?

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 + Cefdinir answer

Can you take Bacillus Subtilis with Cefdinir?

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 + Cefdinir answer

Can you take Bifidobacterium Animalis Subsp. Lactis with Cefdinir?

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 + Cefdinir answer

Can you take Coffee Charcoal with Cefdinir?

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 + Cefdinir answer

Can you take European Mandrake with Cefdinir?

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 + Cefdinir answer

Can you take Fermented Milk with Cefdinir?

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 + Cefdinir answer

Can you take Glucomannan with Cefdinir?

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 + Cefdinir answer

Can you take Lacticaseibacillus Casei with Cefdinir?

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 + Cefdinir answer

Can you take Lacticaseibacillus Paracasei with Cefdinir?

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 + Cefdinir answer

Can you take Lacticaseibacillus Rhamnosus with Cefdinir?

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 + Cefdinir answer

Can you take Lactiplantibacillus Pentosus with Cefdinir?

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 + Cefdinir answer

Can you take Lactobacillus Crispatus with Cefdinir?

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

Full Lactobacillus Crispatus + Cefdinir 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) Cefdinir is classified into the pharmacology categories it belongs to, (2) every supplement interaction documented against any of those categories is inherited by Cefdinir, 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.

Cefdinir sits in 6 interaction categories. Open any one to see what the group means:

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 Cefdinir 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 Cefdinir through this category.

Nephrotoxic Drugs 6 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.

6 of the supplement ingredients on this page reach Cefdinir through this category.

Seizure Threshold Lowering Drugs 6 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.

6 of the supplement ingredients on this page reach Cefdinir through this category.

Organic Anion Transporter 1 (Oat1) Substrates 4 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.

4 of the supplement ingredients on this page reach Cefdinir through this category.

Organic Anion Transporter 3 (Oat3) Substrates 4 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.

4 of the supplement ingredients on this page reach Cefdinir through this category.

About Cefdinir

Cefdinir is a cephalosporin antibiotic used to treat bacterial infections including bronchitis, pneumonia, and infections of the skin, ears, sinuses, throat, and tonsils.

Generic name: Cefdinir  ·  Brand name: Omnicef.

See the full Cefdinir drug information

Related: does Cefdinir deplete any nutrients?

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

Check a real product

Take a Supplement Product? Check the Whole Bottle Against Cefdinir

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 Cefdinir.

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Pharmacist Counseling Corner

Cefdinir & Supplements: Common Questions

What supplements interact with Cefdinir?
In our interaction database, 60 supplement and herbal ingredients have an interaction with Cefdinir on file — 3 rated major, 46 moderate, and 11 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: Siberian Cocklebur, Activated Charcoal, Asarabacca.
Which Cefdinir supplement interactions are the most serious?
The 3 major-rated combinations — led by Siberian Cocklebur, Activated Charcoal and Asarabacca — 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 Cefdinir?
That depends entirely on which supplement. The honest answer for Cefdinir 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 Omnicef have the same supplement interactions as Cefdinir?
Yes — Omnicef all contain Cefdinir, 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 Cefdinir deplete any vitamins or nutrients?
It might — Cefdinir 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 Cefdinir nutrient depletion report for the specifics and what to discuss with your pharmacist.
What about Cefdinir and my other medications?
This page covers Cefdinir against supplements and herbal ingredients. Checking Cefdinir 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 Cefdinir drug information.

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

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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 September 22, 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.