Saccharomyces Boulardii
Saccharomyces boulardii is a probiotic yeast used to prevent and treat various types of diarrhea, including antibiotic-associated diarrhea and traveler's diarrhea, by restoring and maintaining gut health.
A probiotic yeast supplement that helps prevent and treat diarrhea by supporting healthy gut flora balance.
Key facts at a glance
- ATC
- A07FA02
- RxNorm
- 236782
- Generic
- Saccharomyces Boulardii
- Class
- atc-a07
- Brands
- Florastor
- Availability
- rx
- Lactation
- unknown
- Routes
- oral
- Forms
- suspension, capsule
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Prevention and treatment of antibiotic-associated diarrhea, prevention of traveler's diarrhea, treatment of acute gastroenteritis in adults and children, and adjunctive therapy for Clostridioides difficile infection recurrence.
Saccharomyces boulardii is a non-pathogenic yeast probiotic that works by restoring and maintaining the natural balance of intestinal flora, inhibiting pathogen growth, and supporting gut barrier function and immune responses in the gastrointestinal tract.
Generally well-tolerated but should be avoided in immunocompromised patients or those with central venous catheters due to rare risk of fungemia. May cause mild digestive discomfort initially. Should be taken at least 2 hours apart from antifungal medications. Consult a healthcare provider before use in pregnant or breastfeeding individuals.
Official drug label
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 25, 2026. · Read our editorial policy