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Dietary supplement

Lactobacillus Gasseri 3 Billion CFU Ingredients & Drug Interactions

by Swanson

Lactobacillus Gasseri 3 Billion CFU label
See full label image
Capsule Category: Non-nutrient/non-botanical
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Lactobacillus Gasseri 3 Billion CFU 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: Moderate

Lactobacillus Gasseri 3 Billion CFU is a dietary supplement by Swanson with 1 active ingredient. Its ingredients are commonly taken for digestive health, weight and belly fat management, vaginal and urinary health.Based on those ingredients, 182 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Lactobacillus gasseri. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Lactobacillus Gasseri 3 Billion CFU by Swanson

Ask about any prescription or over-the-counter medication and we check it for interactions with Lactobacillus Gasseri 3 Billion CFU by Swanson — and tell you which ingredient is responsible.

Pharmacist-reviewed data Checks every ingredient Answer in seconds
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HelloPharmacist Scorecard of Lactobacillus Gasseri 3 Billion CFU by Swanson

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 Aug 13, 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: Lactobacillus gasseri, a live probiotic bacterium at 3 billion colony-forming units (CFU) per capsule. It also contains several inactive ingredients—microcrystalline cellulose, hydroxypropyl methylcellulose, gellan gum, silica, and magnesium stearate—which are fillers and capsule materials that help deliver the probiotic.

Does it work?

Not established
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
Not established

The graded evidence we hold for these ingredients covers different conditions than the ones this product is marketed for, so there's no established rating for its stated use — see Lactobacillus Gasseri's own graded uses on its monograph.

Why this rating?
  • The label markets this product for: weight management and digestive health support.
  • We looked for evidence on: Obesity, Irritable bowel syndrome (IBS), Diarrhea, Dyspepsia, Gut dysbiosis, Microbiota imbalance.
  • The closest evidence on file: Lactobacillus Gasseri is rated "Insufficient Reliable Evidence To Rate" for Diarrhea (Natural Medicines).
  • Also on file: Lactobacillus Gasseri is rated "Insufficient Reliable Evidence To Rate" for Dyspepsia, Irritable bowel syndrome (IBS), Obesity.

The evidence we hold doesn't establish that Lactobacillus gasseri is effective for any of the conditions listed—hay fever, aspirin-related stomach damage, asthma, bacterial vaginosis, the common cold, or diarrhea. For all of these, the reliability and strength of available evidence fall short of a clear recommendation.

That doesn't mean it won't help in your situation; it means the studies to date don't support a confident claim either way.

The evidence, ingredient by ingredient Lactobacillus Gasseri

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.

Lactobacillus gasseri is generally well tolerated in healthy adults, though the evidence base is limited and some people should be cautious. Safety data is not robust, so it's wise to talk with your doctor before starting, especially if you have a compromised immune system or serious underlying illness.

There's a theoretical concern that live probiotic organisms might cause infection in certain patients—cases of bacteremia, sepsis, endocarditis, and other serious infections have been reported with some lactobacilli species, though these are thought to occur mainly when bacteria move from their normal locations (like the mouth) into the bloodstream. Specific pregnancy and breastfeeding safety information is not on file for this ingredient; talk with your doctor or pharmacist about whether it's right for you during pregnancy or while nursing.

Side effects, ingredient by ingredient Lactobacillus Gasseri

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Lactobacillus Gasseri.
  • The most serious interaction on file is rated Moderate.
  • For scale: 182 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.

Antibiotic drugs are the main medication class to double-check before taking this product. Antibiotics can significantly reduce the live organisms in Lactobacillus gasseri, making the supplement less effective — spacing out when you take each one helps.

Ask your doctor or pharmacist how to time them properly.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with no established evidence rating for its marketed use. Moderate medication interactions have been identified, and safety information is well characterized.

Lactobacillus gasseri is a single-ingredient probiotic supplement that remains generally well tolerated but lacks strong evidence for the conditions it's marketed for. If you take antibiotics, timing your doses carefully is important to avoid reducing the probiotic's activity.

Anyone with a weakened immune system or serious illness should check with their own doctor or pharmacist before using it.

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 16, 2022.

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 Lactobacillus Gasseri 3 Billion CFU, straight from the product label.

Brand Swanson
Barcode (UPC) 087614190273
Net contents 60 Veggie DRcap(s)
Market status On market
Date entered into DSLD Jun 16, 2022
DSLD ID 266892
Product type Non-nutrient/non-botanical
Supplement form Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Vegetarian, Adult (18 - 50 Years)
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 Lactobacillus Gasseri 3 Billion CFU by Swanson, 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:
1 Veggie Capsule(s)
Maximum serving Sizes:
1 Veggie Capsule(s)
Servings per container
60
UPC/BARCODE
087614190273
IngredientAmount% DV
Lactobacillus gasseri15 mg--

Other ingredients: Microcrystalline Cellulose, Hydroxypropyl Methylcellulose, Gellan Gum, Silica, Magnesium Stearate

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.
General Statements

swanson.com or call 1-800-437-4148

Science-Backed Quality Since 1969

Formulation

Weight management support Supports digestive health Promotes healthy microbiota

V Vegetarian

Digestive Health

Suggested/Recommended/Usage/Directions

Suggested use: As a dietary supplement, take one veggie DRcaps capsule one to two times per day with food and water.

Brand IP Statement(s)

DRcaps & logo are trademarks of Lonza or its affiliates.

Precautions

Warning: For adults only.

Consult your healthcare provider before using this or any product if you are pregnant or nursing, taking medication or have a medical condition.

Keep out of reach of children.

Do not use if seal is broken.

Storage

Store in a cool, dry place.

FDA Disclaimer Statement

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

Formula

3 Billion CFU

FDA Statement of Identity

Dietary Supplement

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

See for yourself

Lactobacillus Gasseri 3 Billion CFU by Swanson label

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

Lactobacillus Gasseri 3 Billion CFU 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 Lactobacillus Gasseri 3 Billion CFU by Swanson

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

Serving size1 Veggie Capsule(s) Dosage formCapsule Servings per container60 Amounts shown are per serving.

Lactobacillus gasseri

Interacts with
182 drugs
15 mg per serving

Lactobacillus gasseri is a 'friendly' probiotic bacterium found naturally in the human gut, mouth, and vaginal tract, and in some fermented foods. Ear...

Lactobacillus gasseri monograph & interactions

Other (inactive) ingredients: Microcrystalline Cellulose, Hydroxypropyl Methylcellulose, Gellan Gum, Silica, Magnesium Stearate. These complete the product’s ingredient list but are not active constituents.

Interaction report

Lactobacillus Gasseri 3 Billion CFU by Swanson Drug Interactions

Want to check YOUR meds against Lactobacillus Gasseri 3 Billion CFU?

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
182Drugs
182 Moderate

Ingredients driving the most interactions

Lactobacillus gasseri 182

Individual Drug Interactions

The ingredients in Lactobacillus Gasseri 3 Billion CFU interact with 182 drugs. Click any drug to see the details.

1 of the 1 ingredient in Lactobacillus Gasseri 3 Billion CFU interact with drugs. Each result below shows which ingredient is responsible. Lactobacillus gasseri

Each ingredient & the kinds of drugs it affects

For each ingredient in Lactobacillus Gasseri 3 Billion CFU 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.

Lactobacillus gasseri1 drug type · 182 drugs

Antibiotic Drugs

Theoretically, taking Lactobacillus gasseri with antibiotic drugs might decrease the effectiveness of L. gasseri.
Lactobacillus gasseri preparations usually contain live and active organisms. Therefore, simultaneously taking antibiotics might kill a significant number of the organisms. Tell patients to separate administration of antibiotics and L. gasseri preparations by at least two hours.

Likelihood Probable Evidence D
Lactobacillus gasseri full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Lactobacillus Gasseri 3 Billion CFU, from the product label.

Swanson

See all Swanson products
Name
Swanson Health Products
City
Fargo
State
ND
ZipCode
58104
Phone Number
1-800-437-4148
Web Address
swanson.com
Pharmacist Counseling Corner

Lactobacillus Gasseri 3 Billion CFU by Swanson: Common Questions

Does Lactobacillus Gasseri 3 Billion CFU by Swanson interact with any medications?
Yes. Based on its ingredients, Lactobacillus Gasseri 3 Billion CFU has a known interaction with 182 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Lactobacillus Gasseri 3 Billion CFU 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.
Will antibiotics ruin this probiotic?
Antibiotics can kill a lot of the live organisms in Lactobacillus gasseri, which might make it less effective. That's why it's important to space them apart — your doctor or pharmacist can tell you how many hours apart to take them so each one works as intended.
Does Lactobacillus gasseri actually work for diarrhea or other digestive issues?
The evidence we hold isn't strong enough to say it works reliably for diarrhea or the other conditions listed (hay fever, asthma, bacterial vaginosis, the common cold, or aspirin-related stomach damage). That doesn't guarantee it won't help you — it just means the research to date hasn't proven it clearly.
Is it safe if I have a weak immune system?
There's a theoretical concern that live probiotic organisms might cause infection in people with compromised immunity. Serious infections linked to some lactobacilli species have been reported, though they're rare. Talk with your doctor before using it if your immune system is weakened.
Can I take this while pregnant or breastfeeding?
We don't have enough safety data on file for this ingredient during pregnancy or breastfeeding. Talk with your doctor or pharmacist — they can weigh the potential benefits and risks for your specific situation.
What's in this besides the probiotic?
The capsule contains microcrystalline cellulose, hydroxypropyl methylcellulose, gellan gum, silica, and magnesium stearate — common inactive ingredients that help hold and deliver the supplement.

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

Not sure if Lactobacillus Gasseri 3 Billion CFU is safe with your meds?

Our pharmacists answer your medication & supplement questions — free.

Ask a pharmacist

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.

Lactobacillus Gasseri 3 Billion CFU label
Go deeper

The Full Monographs Behind Lactobacillus Gasseri 3 Billion CFU’s Ingredients

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

Herb & supplement monograph

Lactobacillus Gasseri

Interacts with 182 drugs

Lactobacillus gasseri is a 'friendly' probiotic bacterium found naturally in the human gut, mouth, and vaginal tract, and in some fermented foods. Early research suggests it may help with di...

Read the full Lactobacillus Gasseri monograph →
Sources

Sources & How We Checked

Lactobacillus Gasseri 3 Billion CFU'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 12 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.

Lactobacillus Gasseri 12 references
  1. Pierce A. The American Pharmaceutical Association Practical Guide to Natural Medicines. New York: The Stonesong Press, 1999:19.
  2. Ramachandran L, Dontaraju VS, Patel K. Lactobacillus-associated spontaneous bacterial peritonitis in a liver cirrhosis patient on probiotics. Cureus. 2020;12(12):e11896. PubMed
  3. Rossi F, Amadoro C, Gasperi M, Colavita G. Lactobacilli infection case reports in the last three years and safety implications. Nutrients. 2022;14(6):1178. PubMed
  4. Ranchal P, Gupta R, Goldberg R, A Lobo S, Pascual A, El Khoury MY. Penicillin-sensitive Lactobacillus jensenii bacteremia. Am J Ther 2021;28(2):e250-e252. PubMed
  5. Grazioli-Gauthier L, Rigamonti E, Leo LA, Martinetti Lucchini G, Lo Priore E, Bernasconi E. Lactobacillus jensenii mitral valve endocarditis: Case report, literature review and new perspectives. IDCases 2022;27:e01401. PubMed
  6. Toprak NU, Bozan T, Yilmaz S, Buyukbayrak EE, Tigen ET. Polymicrobial bacteremia due to Lactobacillus jensenii and Veillonella montpellierensis in a pregnant patient; case report and review of literature. Anaerobe 2022;75:102576. PubMed
  7. Chazan B, Raz R, Shental Y, Sprecher H, Colodner R. Bacteremia and pyelonephritis caused by Lactobacillus jensenii in a patient with urolithiasis. Isr Med Assoc J 2008;10(2):164-5.
  8. Ramos-Coria D, Canto-Losa J, Carrillo-Vázquez D, Carbajal-Morelos L, Estrada-León R, Corona-Rodarte E. Lactobacillus gasseri liver abscess and bacteremia: a case report. BMC Infect Dis 2021;21(1):518. PubMed
  9. Elikowski W, Malek-Elikowska M, Lisiecka M, Bodora A, Wisniewska K, Oko-Sarnowska Z. Lactobacillus gasseri endocarditis on the aortic valve bioprosthesis - a case report. Pol Merkur Lekarski 2017;43(257):220-223.
  10. Esquibel A, Dababneh AS, Palraj BR. Lactobacillus gasseri causing bilateral empyema. Case Rep Infect Dis 2017;2017:4895619.
  11. Tleyjeh IM, Routh J, Qutub MO, Lischer G, Liang KV, Baddour LM. Lactobacillus gasseri causing Fournier's gangrene. Scand J Infect Dis 2004;36(6-7):501-3. PubMed
  12. Dickgiesser U, Weiss N, Fritsche D. Lactobacillus gasseri as the cause of septic urinary infection. Infection 1984;12(1):14-6. PubMed

See these in context on the Lactobacillus Gasseri 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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