Herb & supplement monograph

Lacticaseibacillus Paracasei Drug Interactions, Uses, Effectiveness, Safety & More

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS ·Updated July 2026

What is this page for?

First and foremost: how Lacticaseibacillus Paracasei interacts with medications. The heart of this page is the interaction list — every drug Lacticaseibacillus Paracasei is known to interact with, and how serious each one is.

But these pages have grown well beyond that into a full monograph — what Lacticaseibacillus Paracasei is, what people use it for and how strong the evidence is, its safety and side effects, and answers to the questions we’re asked most — written and reviewed by the clinical staff at HelloPharmacist. It’s educational information from our licensed clinical databases, not medical advice, and we don’t sell or endorse products. Our editorial policy

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On this page

Lacticaseibacillus Paracasei Drug Interactions: The Bottom Line

From the HelloPharmacist Editorial Team · Updated July 2026

Based on the available evidence, the overall risk of a clinically significant Lacticaseibacillus Paracasei drug interaction is low for most people, because the only documented concern affects the probiotic itself rather than the safety of any medication. None of the listed interactions are rated major, and every one of them involves a single issue: antibiotics may reduce how well this probiotic works.

Interactions deserving the most attention

The interactions that deserve attention all involve antibiotics. Because Lacticaseibacillus paracasei products contain live, active bacteria, taking an antibiotic at the same time can kill many of those organisms and blunt the benefit you are hoping to get from the supplement. This is a reasonably well-supported concern, but it runs in one direction only; there is no evidence in this profile that the probiotic makes any antibiotic less effective or less safe.

What the rest of the list means

Although the number of interacting medications looks large, it reflects the many individual antibiotics on the market, not many different types of risk. Every entry traces back to the same practical point about antibiotics and live bacteria, and no interaction here suggests harm to you or interference with how your medications work in the body.

Check your medications against Lacticaseibacillus Paracasei

Based on HelloPharmacist’s Lacticaseibacillus Paracasei interaction data and reviewed under our editorial standards.

Interaction report

Drugs that interact with Lacticaseibacillus Paracasei

182 medications have a known interaction with Lacticaseibacillus Paracasei, graded by severity. Select any drug for the full evidence-based detail.

Don’t want to scroll the list? Just ask.

Tell us the medications you take and we’ll check each one against Lacticaseibacillus Paracasei using our pharmacist-reviewed interaction data.

AI summaries are generated from our Lacticaseibacillus Paracasei interaction data for education only — always confirm with your pharmacist. How we use AI

2,830 drugs

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 drug listed above links to the full report for that exact Lacticaseibacillus Paracasei combination — clinical detail, likelihood, evidence level, and citations.
Content is reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

The big picture

The kinds of drugs Lacticaseibacillus Paracasei affects

Every type of medication (drug category) Lacticaseibacillus Paracasei is known to interact with. Open any category for the detail — or search your exact drug in the checker above.

All 1 drug category Lacticaseibacillus Paracasei interacts with

Antibiotic Drugs

Theoretically, taking Lacticaseibacillus paracasei with antibiotic drugs might decrease the effectiveness of L. paracasei.
L. paracasei 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. paracasei preparations by at least two hours.

Likelihood Probable Evidence D

Monograph

Lacticaseibacillus Paracasei: Uses, Safety & Side Effects

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS · Reviewed July 2026 ·

The bottom line

Lacticaseibacillus paracasei (formerly Lactobacillus paracasei) is a probiotic bacterium found in fermented foods and supplements that is widely used to support gut and immune health. Some strains have promising research for digestion, diarrhea, and allergies, but results vary by strain and many uses are not firmly proven. It is generally well tolerated in healthy people, but those who are seriously ill or immune-compromised should check with a doctor first.

Scientific name: Lacticaseibacillus paracasei
Family: Lactobacillaceae
Part used: Live bacterial cells (probiotic strain)
Common forms: Capsules, tablets, powders, sachets, fermented dairy products (yogurt, kefir), and functional foods

People commonly use it for

Digestive health and regularity
Immune support
Diarrhea (including antibiotic-associated)
Allergy and eczema symptoms
Gut microbiome balance

Popular and traditional uses — not proof it works. See “Uses & effectiveness” below for the evidence.

Safety at a glance

OverallUse caution

Generally well tolerated in healthy people, but caution is needed for those who are seriously ill or have weakened immune systems.

PregnancyPossibly Safe

When used orally and appropriately. A combination of Lacticaseibacillus paracasei and Bifidobacterium longum from 2 months prior to delivery until 2 m...

Read the full pregnancy detail

BreastfeedingPossibly Safe

When used orally and appropriately. A combination of Lacticaseibacillus paracasei and Bifidobacterium longum from 2 months prior to delivery until 2 m...

Read the full breastfeeding detail

Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center). Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

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Overview

Lacticaseibacillus paracasei is a type of friendly bacteria, also called a probiotic. It used to be named Lactobacillus paracasei before scientists updated the naming system in 2020. It is a relative of other well-known probiotics like Lactobacillus casei and Lactobacillus rhamnosus.

This bacterium is naturally found in the human gut and in many fermented foods, such as yogurt, kefir, certain cheeses, and pickled vegetables. It is also added to many dietary supplements and "functional" foods marketed for gut and immune health.

People take L. paracasei hoping to support digestion, keep the gut microbiome balanced, and help the immune system. Different products use different specific strains, and these strains may behave differently from one another.

How it works

As a probiotic, L. paracasei is thought to work mainly inside the gut. Proposed mechanisms include helping crowd out harmful bacteria, producing substances like lactic acid that lower gut pH, and supporting the gut lining barrier.

Some laboratory and animal studies suggest it may interact with cells of the immune system and influence inflammation, but these effects are not fully understood in people. The bacteria may also help break down certain food components and support a more balanced microbiome.

It is important to know that much of this is based on lab, animal, or small human studies. The effects can depend heavily on the exact strain, the dose, and the person's own gut environment.

Effectiveness

Does Lacticaseibacillus Paracasei work?

Here’s what the research actually shows for each use — graded by Natural Medicines and reviewed by Dr. Brian Staiger, PharmD.

Evidence overview · 53 uses evaluated

2 Possibly effective 1 Leans ineffective 50 Insufficient evidence

How to read these evidence grades

Natural Medicines’ 7-point scale. We show each rating’s label word-for-word.

1EffectiveStrong, consistent evidence it works.

2Likely EffectiveGood evidence, though not yet conclusive.

3Possibly EffectiveSome evidence suggests a benefit.

4Possibly IneffectiveSome evidence it may not help.

5Likely IneffectiveFairly strong evidence it doesn’t help.

6IneffectiveStrong evidence it doesn’t work.

7Insufficient Reliable Evidence to RateToo little research to say either way.

Possibly Effective Allergic rhinitis (hay fever)