Drug & supplement interaction

Lactobacillus Helveticus + Metoprolol

Metoprolol brand names: Lopressor, Toprol XL.

No Known Interaction
Medically reviewed by · Updated July 2026 · Pair last verified Sep 13, 2026
The bottom line No known interaction

We found no known interaction between Lactobacillus Helveticus and Metoprolol in our sources. Absence of a documented interaction is not the same as proven safety, and does not guarantee one does not exist. Do not start, stop, or change a medication or supplement based on this page; confirm with your pharmacist or doctor first. Additionally, although there is no interaction, the label for Metoprolol states a food rule worth keeping to.

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Interaction report

Lactobacillus Helveticus and Metoprolol

We checked these two against our interaction database. Here is what we found.

No Known Interaction Found

We did not find a documented interaction between Metoprolol and Lactobacillus Helveticus in our sources. This does not guarantee that the combination is completely free of risk — there is often limited research on supplements and herbal products, especially around drug interactions.

If you decide to take both, the practical routine is simple: add one new thing at a time and note the date you started it. If the combination is going to disagree with you, it usually shows in the first days to a couple of weeks — and a start date turns “I’ve been feeling off” into something a pharmacist can actually work with. Do not stop a prescribed medicine on your own.

Always talk with your pharmacist or doctor before making changes to your medications or supplements, particularly if you take several medications or have an ongoing health condition.

Lactobacillus Helveticus safety at a glance

Lactobacillus Helv... overall Use caution Generally well tolerated in healthy people, but people who are seriously ill or immunocompromised should be cautious.
Pregnancy Use caution Not enough reliable safety data; use only with your doctor's guidance.
Breastfeeding Use caution Limited safety information, so check with your doctor before use.

Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Metoprolol and Lactobacillus Helveticus? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Metoprolol

Interactions in our licensed database are recorded against drug classes, not just single drug names. Metoprolol is filed under 6 classifications — including beta-blockers, antihypertensive drugs, cytochrome p450 2d6 (cyp2d6) substrates. Lactobacillus Helveticus has documented interactions with 1 drug class — the most serious being antibiotic drugs (moderate) — and none of Metoprolol’s classifications are among them.

Classification data comes from our licensed Natural Medicines dataset. A medication can belong to classes beyond those recorded there, so this describes how the check was run — it is not a safety guarantee.

Keep it in perspective

Lactobacillus Helveticus Does Interact With Other Medications

Lactobacillus Helveticus has 182 moderate known drug interactions in our database — Metoprolol isn’t one of them. If you take anything else, check it against the full list below.

Moderate 182 No known interaction 2,648 (incl. Metoprolol)
Taking anything else?

Check Another of Your Medications Against Lactobacillus Helveticus

Covers the 2,830 medications we’ve checked against Lactobacillus Helveticus. Pick one to open its full report.

What to actually watch for

What Lactobacillus Helveticus Itself Has Been Linked To

This is not an interaction — nothing below involves Metoprolol. It is the side-effect record for Lactobacillus Helveticus on its own, from the licensed Natural Medicines monograph. If something new turns up after you add Lactobacillus Helveticus, this list is the first place to look. One entry is worth acting on rather than waiting out — marked below.

  • A higher chance of infection Worth acting on Additional detail

    “Since Lactobacillus helveticus preparations contain live and active microorganisms, there is some concern that they might cause pathogenic infection in some patients. Some lactobacilli species have been isolated in cases of bacteremia, sepsis, splenic abscess, endocarditis, necrotizing fasciitis, pancreatic necrosis, and meningoencephalitis.”

    Lactobacillus Helveticus · Natural Medicines adverse-effect record, reported in sepsis.

    1 source cited
    1. 107543. 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

Everything above comes from the Natural Medicines adverse-effect record for Lactobacillus Helveticus — expand a row for the licensed statement it rests on. We read the ADVERSE REACTIONS section of Metoprolol’s FDA label too, and the two lists don’t meaningfully overlap — which is why no Metoprolol column appears here.

How to take them

Some Metoprolol Products Have a Food Rule — Lactobacillus Helveticus Should Not Break It

At least one FDA label for a product containing Metoprolol says to take it with food. If you take Lactobacillus Helveticus on an empty stomach out of habit, keep them separate — and take Metoprolol with a meal where the label says to.

This may not be true of your version. Food instructions belong to the product, not the ingredient: two Metoprolol products can carry different directions, and extended-release forms often differ from immediate-release ones. The label we read is quoted below — check the directions on your own box or bottle, or ask your pharmacist, for how to take the exact product you were given.

Administer once daily with food or after a meal.

From the Dosage and Administration section of the FDA label we read for Metoprolol — where that label names a specific product, the instruction is that product's. See the Metoprolol drug page ›

A food rule is not an interaction — it is about how much of the medicine you absorb. The directions that came with your own product, and your pharmacist, outrank anything on this page.

From our Q&A

Questions About Lactobacillus Helveticus or Metoprolol

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Lactobacillus Helveticus or Metoprolol, not necessarily both, but if one is close to what you were about to ask it will usually go further than a database entry can:

Not quite your question? Ask our pharmacists directly — it is free, there is no account required, and answers usually come back within 24 hours.

Everything else you take

See Every Supplement That Interacts With Metoprolol

This page covers Lactobacillus Helveticus only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Metoprolol page lists 183 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), American Hellebore (major), American Mistletoe (major), Indian Snakeroot (major) and Tyramine (major).

By severity: 5 major · 152 moderate · 26 minor.

From our pharmacist’s overview on the Metoprolol page

“With metoprolol (Lopressor, Toprol XL), a beta-blocker for high blood pressure and heart problems, these interactions deserve genuine care, starting with the five rated major. Most entries pull blood pressure one way or the other: many supplements add to metoprolol's lowering effect and can drop pressure too far, while a few, tyramine…”

Reviewed by 2 · Jul 18, 2026

Open the Metoprolol interaction page

One more smart check

Taking Lactobacillus Helveticus as Part of a Dietary Supplement Product? Check It for Interactions

We hold 530 real supplement products containing Lactobacillus Helveticus, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Lactobacillus Helveticus. Even though Lactobacillus Helveticus itself has no known interaction with Metoprolol, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:

How much people look this up

Where Lactobacillus Helveticus and Metoprolol Sit Against Everything Else

Out of every supplement and medication people look up on HelloPharmacist, here is where these two land this week — and which way each has been moving.

Supplement Lactobacillus Helveticus
Top half

#383 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Metoprolol
Top 10

#7 of 2,830 medications looked up here in the last 7 days

29 days ago today

Position among everything looked up on this site, not a measure of how commonly either one is used or how important it is. A supplement can climb this list because of a news story. It counts every request to the page, automated ones included, and nothing here identifies anyone.

Where does our data come from?
  • Source: the Natural Medicines (TRC Healthcare) clinical database — the evidence-graded professional reference for herb & supplement interactions.
  • Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every Lactobacillus Helveticus reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Lactobacillus Helveticus and Metoprolol records this page draws on were last updated July 10, 2026.
  • What “no known interaction” means: no documented interaction in the sources above — not a guarantee of safety. Supplements are studied far less than prescription drugs, so we say exactly what the evidence supports, and nothing more.
Data structure & sourcing designed and verified by .
Supplement

About Lactobacillus Helveticus

What is Lactobacillus Helveticus?

  • Mood and stress support
  • Digestive and gut health
  • Sleep support
  • General immune support
  • Blood pressure support

Lactobacillus helveticus is a lactic acid bacterium used as a probiotic, often combined with other strains in mood, gut, and general wellness products. Early research is interesting—especially for stress and mood and for fermented-milk peptides and blood pressure—but evidence is still limited and not conclusive. It is generally well tolerated in healthy people, but talk to your pharmacist or doctor before using it, especially if you have a weakened immune system.

Lactobacillus helveticus · Lactobacillaceae · Live bacterial cultures (probiotic strain) · Capsules, tablets, powders, fermented dairy products (such as some cheeses and milk drinks); often combined with other probiotic strains

An interaction check asks whether these two react with each other — it does not ask whether Lactobacillus Helveticus is a good idea for someone in your situation. Here is what our Lactobacillus Helveticus record says about it on its own.

Lactobacillus Helveticus: dosing

There is no official standardized dose for L. helveticus. Probiotic products are usually measured in colony-forming units (CFU), and different products contain very different amounts and strain combinations.The best approach is to follow the directions on the product label and choose a reputable brand that lists the specific strain and CFU count.

From our Lactobacillus Helveticus monograph — the full record covers uses, side effects and every documented interaction.

Read the full Lactobacillus Helveticus monograph & all interactions
Medication

About Metoprolol

What Is Metoprolol Used For?

Brand names: Lopressor, Toprol XL

Metoprolol is used to treat several heart and blood pressure conditions. Metoprolol succinate extended-release tablets (including Toprol-XL) are approved for high blood pressure, angina pectoris (chest pain from the heart), and heart failure. Metoprolol tartrate tablets (including Lopressor) are approved for high blood pressure, angina, and — when used alongside intravenous metoprolol — to reduce the risk of cardiovascular death after a definite or suspected heart attack.

Metoprolol tartrate injection (intravenous form) is used in hemodynamically stable patients with a definite or suspected acute heart attack to reduce cardiovascular death, and is followed by oral metoprolol therapy. Lowering blood pressure with metoprolol reduces the risk of strokes and heart attacks.

Most-Reported Side Effects for Metoprolol

From FAERS, the FDA’s public side-effect reporting system (0 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Fatigue 23,416 reports
Dyspnea 20,183 reports
Diarrhea 19,912 reports
Nausea 19,659 reports
Dizziness 16,726 reports
See full Metoprolol drug information
Keep checking

Other Drugs & Lactobacillus Helveticus

Browse every other medication we’ve checked against Lactobacillus Helveticus — both the ones with a known interaction and the ones without. Select any drug for the full detail.

0Major
182Moderate
0Minor
2,647No known interaction
182 Moderate 2,647 No interaction
Moderate

182 interactions

Showing 60 of 182 moderate interactions — see all 182 on the Lactobacillus Helveticus page.

No interaction 2,647 drugs checked — show the list

We also checked Lactobacillus Helveticus against these medications and found no known interaction in our sources. Open any page to confirm.

Showing the 60 most looked-up of 2,647 medications checked with no known interaction — see the full Lactobacillus Helveticus list.

See the full Lactobacillus Helveticus interactions page
See every supplement checked against Metoprolol, ranked by severity
Evidence & sources

Lactobacillus Helveticus References

The 2 references that drive our Lactobacillus Helveticus monograph and interaction data, from the evidence-graded Natural Medicines (TRC Healthcare) database. Citations with a link open the study on PubMed or the publisher’s site.

  1. Pierce A. The American Pharmaceutical Association Practical Guide to Natural Medicines. New York: The Stonesong Press, 1999:19.
  2. 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

Medication overviews come from MedlinePlus (NIH); supplement label data from the NIH Dietary Supplement Label Database. Content is written and reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

Pharmacist Counseling Corner

Taking Lactobacillus Helveticus and Metoprolol Together: Common Questions

Is it safe to take Lactobacillus Helveticus with Metoprolol?
We do not list a known interaction between Lactobacillus Helveticus and Metoprolol. That does not guarantee the combination is risk-free, so confirm with your pharmacist or doctor — especially if you take other medications or have a health condition.
Should I take Lactobacillus Helveticus and Metoprolol at the same time of day?
At least one FDA label for a product containing Metoprolol says to take it with food. If you take Lactobacillus Helveticus on an empty stomach out of habit, keep them separate and take Metoprolol with a meal where the label says to. Food instructions belong to the product rather than the ingredient — two Metoprolol products can differ — so check the directions on your own box. This is about absorption, not an interaction.
How was the Lactobacillus Helveticus and Metoprolol combination checked?
Interactions in our licensed database are recorded against drug classes. Metoprolol is filed under 6 classifications, and Lactobacillus Helveticus has documented interactions with 1 drug class — none of Metoprolol's classifications are among them. A medication can belong to classes beyond those recorded in our dataset, so this describes how the check was run rather than guaranteeing safety.
Does Lactobacillus Helveticus interact with any other medications?
Yes. Lactobacillus Helveticus has 182 documented drug interactions in our database — Metoprolol is simply not one of them. If you take anything else, it is worth checking each one; they are all listed on this page.
Does Metoprolol interact with any supplements?
Yes. Metoprolol has documented interactions with 183 supplements in our database — Lactobacillus Helveticus is not one of them. The Metoprolol interaction page linked on this page lists every one, ranked by severity.

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

Where next

Keep Exploring

Lactobacillus Helveticus monograph Uses, safety profile, and every drug interaction in one place Metoprolol drug information The full plain-English guide to this medication Metoprolol supplement interactions Every supplement checked against Metoprolol, ranked by severity Supplement interaction checker Check any supplement or product against your medications Browse medications A–Z Every drug we’ve checked against herbs & supplements References The 2 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Metoprolol and Lactobacillus Helveticus?

Our pharmacists answer your medication & supplement questions — free.

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This information is for education only and is not a substitute for professional medical advice. Always check with your pharmacist or doctor before starting, stopping, or combining supplements and medications.