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Dietary supplement

Probiotic Saccharomyces boulardii Ingredients & Drug Interactions

by Geri-Care

Probiotic Saccharomyces boulardii label
See full label image
Capsule Category: Botanical
Most serious interaction: Minor
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Probiotic Saccharomyces boulardii against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.

Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy

The interaction bottom line Most serious interaction: Minor

Probiotic Saccharomyces boulardii is a dietary supplement by Geri-Care with 1 active ingredient. Its ingredients are commonly taken for acute diarrhea, antibiotic-associated diarrhea, traveler's diarrhea.Based on those ingredients, 40 medications have a known interaction with it, the most serious rated minor. The ingredients most likely to interact are Saccharomyces boulardii. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Probiotic Saccharomyces boulardii by Geri-Care

Ask about any prescription or over-the-counter medication and we check it for interactions with Probiotic Saccharomyces boulardii by Geri-Care — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Probiotic Saccharomyces boulardii by Geri-Care

Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.

From our pharmacy team — supplement deep dive

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Jul 11, 2026

What’s inside

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 1 of its 1 active ingredient.
  • No proprietary blends here — you can verify the dose of every single component.

This product contains one active ingredient: Saccharomyces boulardii, a live yeast probiotic. It's designed to support healthy digestion and gut function.

The capsule also contains inactive ingredients — potato starch, hypromellose (a capsule material), magnesium stearate, and titanium dioxide — which help deliver the active ingredient.

Does it work?

Moderate evidence
Evidence for Intended Use · database check
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed
Moderate

Some clinical evidence supports this product's ingredients for its stated purpose, but it isn't conclusive.

Why this rating?
  • The label markets this product for: helps maintain intestinal health.
  • We looked for evidence on: Antibiotic-associated diarrhea, Travelers' diarrhea, Clostridioides difficile infection, Rotaviral diarrhea, Irritable bowel syndrome (IBS), Crohn disease — and 3 related terms.
  • The strongest evidence on file: Saccharomyces Boulardii is rated "Possibly Effective" for Antibiotic-associated diarrhea (Natural Medicines).
  • Also on file: Saccharomyces Boulardii is rated "Possibly Effective" for Rotaviral diarrhea, Travelers' diarrhea, Clostridioides difficile infection.
  • Also on file: Saccharomyces Boulardii is rated "Insufficient Reliable Evidence To Rate" for Crohn disease, Ulcerative colitis, Irritable bowel syndrome (IBS).

Saccharomyces boulardii is rated possibly effective for several types of diarrhea: rotaviral diarrhea, travelers' diarrhea, and diarrhea caused by antibiotics. The evidence is also listed as possibly effective for necrotizing enterocolitis (a serious intestinal condition in newborns), Clostridioides difficile infection (a bacterial gut infection), and Helicobacter pylori.

That said, 'possibly effective' means the evidence exists but isn't definitive — more research would strengthen the case for any of these uses.

The evidence, ingredient by ingredient Saccharomyces Boulardii

How safe is it?

Well-documented data
Safety Information · database check
Well characterized

Adverse-effect, pregnancy, and general safety data are on file for most of these ingredients.

Why this rating?
  • We hold adverse-effect (side-effect) data for 1 of the 1 matched ingredient.
  • Pregnancy & breastfeeding safety ratings cover 1 of 1.
  • General safety write-ups exist for 1 of 1.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Saccharomyces boulardii is generally well tolerated in healthy adults. However, it should be avoided by people who are critically ill or immunocompromised (have a weakened immune system), since there are rare but serious reports of the yeast entering the bloodstream (fungemia) in those populations — especially in ICU patients with central lines, feeding tubes, or those on broad-spectrum antibiotics.

In rare cases, oral use has also caused gastrointestinal complaints like abdominal cramps, gas, nausea, vomiting, and loss of appetite. Safety data isn't extensive, so talk with your doctor before starting this supplement.

Side effects, ingredient by ingredient Saccharomyces Boulardii

Meds to double-check

Minor interactions only
Known Interaction Concern · database check
Minor only

Only Minor-severity interactions are documented for these ingredients.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Saccharomyces Boulardii.
  • The most serious interaction on file is rated Minor.
  • For scale: 40 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.

If you're taking antifungals (Minor interaction), let us know — the timing of when you take each could affect how well the probiotic works. No other medication interactions are documented for the ingredients we could check, but run your complete list through the tool below before starting.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with some supporting evidence for its stated purpose. Only minor medication interactions are documented, and safety information is well characterized.

Saccharomyces boulardii may help with several types of diarrhea if you're generally healthy. Skip it if you're critically ill or immunocompromised.

If you take any antifungal medication, check with us first — timing matters. Talk to your pharmacist about whether this is right for your situation.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Jun 20, 2024.

This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed

At a glance

General information

Key facts about Probiotic Saccharomyces boulardii, straight from the product label.

Brand Geri-Care
Barcode (UPC) 357896869052
Net contents 50 Capsule(s)
Market status On market
Date entered into DSLD Jun 20, 2024
DSLD ID 309702
Product type Botanical
Supplement form Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Gluten Free
From the label
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.

Supplement Facts

The label details for Probiotic Saccharomyces boulardii by Geri-Care, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
2 Capsule(s)
Maximum serving Sizes:
2 Capsule(s)
Servings per container
25
UPC/BARCODE
357896869052
IngredientAmount% DV
Saccharomyces boulardii500 mg--

Other ingredients: Potato Starch, Hypromellose, Magnesium Stearate, Titanium Dioxide

Tap any ingredient to jump to its full detail below.

Label statements
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
Formulation

Lactose free, gluten free

Helps maintain intestinal health

Made in Canada

Suggested/Recommended/Usage/Directions

Suggested use: Two (2) capsules 1-2 times a day.

Precautions

Do not exceed suggested serving size unless directed by a doctor.

Warning: As with any supplement, if you are pregnant, nursing or taking any medications, consult your doctor before use.

Discontinue use and consult your doctor if any adverse reactions occur.

Tamper evident: Do not use if imprinted seal under cap is missing or broken.

Keep out of reach of children.

Formula

Sacchromyces boulardii is the probiotic found in Florastor This product is not manufactured or distributed by the owner of the registered trademark Florastor.

Storage

Store at controlled room temperature. Keep tightly closed to preserve freshness.

FDA Disclaimer Statement

This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

Is this label outdated? Report a formula or label change and our pharmacy team will review it.

See for yourself

Probiotic Saccharomyces boulardii by Geri-Care label

The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.

Probiotic Saccharomyces boulardii label

Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.

View the full label (PDF)
What’s inside

The Ingredients in Probiotic Saccharomyces boulardii by Geri-Care

This is the 1 active ingredient this product is made of. Select it to open its full monograph.

Serving size2 Capsule(s) Dosage formCapsule Servings per container25 Amounts shown are per serving.

Saccharomyces boulardii

Interacts with
40 drugs
500 mg per serving

Saccharomyces boulardii is a beneficial yeast used as a probiotic, with the strongest evidence for preventing and treating certain types of diarrhea,...

Saccharomyces boulardii monograph & interactions

Other (inactive) ingredients: Potato Starch, Hypromellose, Magnesium Stearate, Titanium Dioxide. These complete the product’s ingredient list but are not active constituents.

Interaction report

Probiotic Saccharomyces boulardii by Geri-Care Drug Interactions

Want to check YOUR meds against Probiotic Saccharomyces boulardii?

Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.

 Go to the checker
40Drugs
40 Minor

Ingredients driving the most interactions

Saccharomyces boulardii 40

Individual Drug Interactions

The ingredients in Probiotic Saccharomyces boulardii interact with 40 drugs. Click any drug to see the details.

1 of the 1 ingredient in Probiotic Saccharomyces boulardii interact with drugs. Each result below shows which ingredient is responsible. Saccharomyces boulardii

Each ingredient & the kinds of drugs it affects

For each ingredient in Probiotic Saccharomyces boulardii with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.

Saccharomyces boulardii1 drug type · 40 drugs

Antifungals

Theoretically, taking antifungals with Saccharomyces boulardii might decrease the effectiveness of Saccharomyces boulardii.
S. boulardii is a live yeast. Therefore, simultaneously taking antifungals might kill a significant number of the organisms.

Likelihood Possible Evidence D
Saccharomyces boulardii full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Probiotic Saccharomyces boulardii, from the product label.

Geri-Care

See all Geri-Care products
Name
Geri-Care Pharmaceuticals Corp.
Street Address
1295 Towbin Ave
City
Lakewood
State
NJ
ZipCode
08701
Phone Number
1-800-540-3765
Pharmacist Counseling Corner

Probiotic Saccharomyces boulardii by Geri-Care: Common Questions

Does Probiotic Saccharomyces boulardii by Geri-Care interact with any medications?
Yes. Based on its ingredients, Probiotic Saccharomyces boulardii has a known interaction with 40 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Probiotic Saccharomyces boulardii contains a single active ingredient, and that one ingredient can interact with many different medications on its own. We check it against each medication and show the mechanism responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Can I take this if I'm on antibiotics?
Saccharomyces boulardii is often used alongside antibiotics to help prevent antibiotic-associated diarrhea, and no interaction with antibiotics themselves is documented. That said, if you're on broad-spectrum antibiotics and you're critically ill or immunocompromised, talk with your doctor first — there's a rare risk of the yeast getting into your bloodstream in those situations.
What if I'm taking an antifungal?
Yes, there's a Minor interaction here. Antifungals may kill some of the live yeast in this supplement, making it less effective. Ask your pharmacist about spacing out your doses or whether you should pause the probiotic while you're on the antifungal.
Is it safe during pregnancy or while breastfeeding?
The safety data we hold doesn't include pregnancy or breastfeeding information for this ingredient. Talk with your doctor or pharmacist — they can give you personalized advice based on your situation.
What side effects might I experience?
Most people tolerate it well. Rarely, it may cause gastrointestinal complaints like abdominal cramps, gas, nausea, vomiting, or decreased appetite. Stop and contact your healthcare provider if you develop any unusual symptoms.
Who should avoid this supplement?
People who are critically ill or have a weakened immune system should avoid it. There are rare but serious reports of the live yeast entering the bloodstream in those populations, particularly in ICU patients with central lines or feeding tubes. Talk with your doctor first if you fall into either group.
Does this actually work for diarrhea?
It's rated possibly effective for rotaviral diarrhea, travelers' diarrhea, antibiotic-associated diarrhea, and a few other conditions. That means evidence exists but isn't conclusive — it may help, but results aren't guaranteed for everyone.

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

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Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.

Probiotic Saccharomyces boulardii label
Go deeper

The Full Monographs Behind Probiotic Saccharomyces boulardii’s Ingredients

Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.

Herb & supplement monograph

Saccharomyces Boulardii

Interacts with 40 drugs

Saccharomyces boulardii is a beneficial yeast used as a probiotic, with the strongest evidence for preventing and treating certain types of diarrhea, including antibiotic-associated diarrhea...

Read the full Saccharomyces Boulardii monograph →
Sources

Sources & How We Checked

Probiotic Saccharomyces boulardii's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.

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

The 26 references behind this product’s interaction data

Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.

Saccharomyces Boulardii 26 references
  1. Niault M, Thomas F, Prost J, et al. Fungemia due to Saccharomyces species in a patient treated with enteral Saccharomyces boulardii. Clin Infect Dis 1999;28:930.
  2. Pletinex M, Legein J, Vandenplas Y. Fungemia with Saccharomyces boulardii in a 1-year-old girl with protracted diarrhea. J Pediatr Gastroenterol Nutr 1995;21:113-5. DOI
  3. Fredenucci I, Chomarat M, Boucaud C, et al. Saccharomyces boulardii fungemia in a patient receiving ultra-levure therapy. Clin Infect Dis 1998;27:222-3.
  4. Elmer GW, McFarland LV, Surawicz CM, et al. Behaviour of Saccharomyces boulardii in recurrent Clostridium difficile disease patients. Aliment Pharmacol Ther 1999;13:1663-8.
  5. Lewis SJ, Freedman AR. Review article: the use of biotherapeutic agents in the prevention and treatment of gastrointestinal disease. Aliment Pharmacol Ther 1998;12:807-22. PubMed
  6. Cesaro S, Chinello P, Rossi L, Zanesco L. Saccharomyces cerevisiae fungemia in a neutropenic patient treated with Saccharomyces boulardii. Support Care Cancer 2000;8:504-5. PubMed
  7. Hennequin C, Thierry A, Richard GF, et al. Microsatellite typing as a new tool for identification of Saccharomyces cerevisiae strains. J Clin Microbiol 2001;39:551-9.
  8. Plein K, Hotz J. Therapeutic effects of Saccharomyces boulardii on mild residual symptoms in a stable phase of Crohn's disease with special respect to chronic diarrhea - a pilot study. Z Gastroenterol 1993;31:129-34.
  9. Borriello SP, Hammes WP, Holzapfel W, et al. Safety of probiotics that contain lactobacilli or bifidobacteria. Clin Infect Dis 2003;36:775-80. PubMed
  10. Marteau P, Seksik P. Tolerance of probiotics and prebiotics. J Clin Gastroenterol 2004;38:S67-9. PubMed
  11. Munoz P, Bouza E, Cuenca-Estrella M, et al. Saccharomyces cerevisiae fungemia: an emerging infectious disease. Clin Infect Dis 2005;40:1625-34. PubMed
  12. Lherm, T., Monet, C., Nougiere, B., Soulier, M., Larbi, D., Le Gall, C., Caen, D., and Malbrunot, C. Seven cases of fungemia with Saccharomyces boulardii in critically ill patients. Intensive Care Med 2002;28(6):797-801. PubMed
  13. Riquelme, A. J., Calvo, M. A., Guzman, A. M., Depix, M. S., Garcia, P., Perez, C., Arrese, M., and Labarca, J. A. Saccharomyces cerevisiae fungemia after Saccharomyces boulardii treatment in immunocompromised patients. J Clin.Gastroenterol. 2003;36(1):41- PubMed
  14. Cherifi, S., Robberecht, J., and Miendje, Y. Saccharomyces cerevisiae fungemia in an elderly patient with Clostridium difficile colitis. Acta Clin Belg. 2004;59(4):223-224. PubMed
  15. Ellouze O, Berthoud V, Mervant M, Parthiot JP, Girard C. Septic shock due to Sacccaromyces boulardii. Med Mal Infect. 2016;46(2):104-105.
  16. Appel-da-Silva MC, Narvaez GA, Perez LRR, Drehmer L, Lewgoy J. Saccharomyces cerevisiae var. boulardii fungemia following probiotic treatment. Med Mycol Case Rep. 2017;18:15-7. PubMed
  17. Atici S, Soysal A, Karadeniz Cerit K, et al. Catheter-related Saccharomyces cerevisiae Fungemia Following Saccharomyces boulardii Probiotic Treatment: In a child in intensive care unit and review of the literature. Med Mycol Case Rep. 2017;15:33-35. PubMed
  18. Martin IW, Tonner R, Trivedi J, et al. Saccharomyces boulardii probiotic-associated fungemia: questioning the safety of this preventive probiotic's use. Diagn Microbiol Infect Dis. 2017;87(3):286-8. PubMed
  19. Romanio MR, Coraine LA, Maielo VP, Abramczyc ML, Souza RL, Oliveira NF. Saccharomyces cerevisiae fungemia in a pediatric patient after treatment with probiotics. Rev Paul Pediatr 2017;35(3):361-4.
  20. Roy U, Jessani LG, Rudramurthy SM, et al. Seven cases of Saccharomyces fungaemia related to use of probiotics. Mycoses 2017;60(6):375-380.
  21. Romanio MR, Coraine LA, Maielo VP, Abramczyc ML, Souza RL, Oliveira NF. Saccharomyces cerevisiae fungemia in a pediatric patient after treatment with probiotics. Rev Paul Pediatr. 2017 Jul-Sep;35(3):361-364. doi: 10.1590/1984-0462/;2017;35;3;00014.
  22. Flatley EA, Wilde AM, Nailor MD. Saccharomyces boulardii for the prevention of hospital onset Clostridium difficile infection. J Gastrointestin Liver Dis. 2015;24(1):21-4. PubMed
  23. Ventoulis I, Sarmourli T, Amoiridou P, et al. Bloodstream infection by Saccharomyces cerevisiae in two COVID-19 patients after receiving supplementation of Saccharomyces in the ICU. J Fungi (Basel). 2020;6(3):98. PubMed
  24. Wombwell E, Bransteitter B, Gillen LR. Incidence of Saccharomyces cerevisiae fungemia in hospitalised patients administered Saccharomyces boulardii probiotic. Mycoses 2021;64(12):1521-1526.
  25. Rannikko J, Holmberg V, Karppelin M, et al. Fungemia and Other Fungal Infections Associated with Use of Saccharomyces boulardii Probiotic Supplements. Emerg Infect Dis 2021;27(8):2090-6.
  26. Awoyemi A, Mayerhofer C, Felix AS, et al. Rifaximin or Saccharomyces boulardii in heart failure with reduced ejection fraction: Results from the randomized GutHeart trial. EBioMedicine 2021;70:103511. PubMed

See these in context on the Saccharomyces Boulardii monograph →

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

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