Drug & supplement interaction

Kefir + Metoproterenol

Metoproterenol brand name: Alupent.

No Known Interaction

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS · Updated July 2026 · Pair last verified Sep 13, 2026

The bottom line No known interaction

We found no known interaction between Kefir and Metoproterenol 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.

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Interaction report

Kefir and Metoproterenol

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 Metoproterenol and Kefir 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.

Kefir safety at a glance

Kefir overall Generally safe Kefir is generally safe for most healthy people as a food.

Pregnancy Use caution Pasteurized-milk kefir is likely fine, but avoid unpasteurized or homemade versions and consult your doctor.

Breastfeeding Use caution Likely fine as a food, but choose pasteurized products and check with your doctor.

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

Still wondering about combining Metoproterenol and Kefir? Ask Dr. Brian Staiger, PharmD, BCPS directly ›

How we checked

Why No Interaction Is Listed for Metoproterenol

Interactions in our licensed database are recorded against drug classes, not just single drug names. Metoproterenol is filed under a single classification — beta-adrenergic agonists. Kefir has documented interactions with 2 drug classes — the most serious being immunosuppressants (moderate) and disulfiram (antabuse) (minor) — and none of Metoproterenol’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

Kefir Does Interact With Other Medications

Kefir has 121 moderate, 1 minor known drug interactions in our database — Metoproterenol isn’t one of them. If you take anything else, check it against the full list below.

Moderate 121 Minor 1 No known interaction 2,708 (incl. Metoproterenol)

Taking anything else?

Check Another of Your Medications Against Kefir

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

What to actually watch for

What Kefir Itself Has Been Linked To

This is not an interaction — nothing below involves Metoproterenol. It is the side-effect record for Kefir on its own, from the licensed Natural Medicines monograph. If something new turns up after you add Kefir, this list is the first place to look.

Bloating or gas / Constipation / Stomach pain / Diarrhea / Nausea Additional detail
“Orally, kefir might cause bloating, nausea, intestinal cramping, diarrhea, and constipation with initial use. These symptoms are uncommon and usually resolve after continued use. However, severe bloating and abdominal cramping resulting in withdrawal from a clinical trial has been reported for 3 patients.”

Kefir · Natural Medicines adverse-effect record, reported in constipation.
4 sources cited

7636. St-Onge MP, Farnworth ER, Savard T, et al. Kefir consumption does not alter plasma lipid levels or cholesterol fractional synthesis rates relative to milk in hyperlipidemic men: a randomized controlled trial [ISRCTN10820810]. BMC Complement Altern Med 200 PubMed

95314. Turan I, Dedeli Ö, Bor S, Ilter T. Effects of a kefir supplement on symptoms, colonic transit, and bowel satisfaction score in patients with chronic constipation: a pilot study. Turk J Gastroenterol. 2014;25(6):650-6. PubMed

112046. Bellikci-Koyu E, Sarer-Yurekli BP, Karagozlu C, Aydin-Kose F, Ozgen AG, Buyuktuncer Z. Probiotic kefir consumption improves serum apolipoprotein A1 levels in metabolic syndrome patients: a randomized controlled clinical trial. Nutr Res 2022;102:59-70. PubMed

95311. Fathi Y, Faghih S, Zibaeenezhad MJ, Tabatabaei SH. Kefir drink leads to a similar weight loss, compared with milk, in a dairy-rich non-energy-restricted diet in overweight or obese premenopausal women: a randomized controlled trial. Eur J Nutr. 2016;55(1) PubMed

Everything above comes from the Natural Medicines adverse-effect record for Kefir — expand a row for the licensed statement it rests on. We haven’t matched Metoproterenol to its FDA label in our system yet, so we can’t compare its own side-effect list here — the leaflet that comes with your prescription is the authoritative list for Metoproterenol.

Overlapping uses

What Metoproterenol Is Prescribed For, and What Kefir Has Been Studied For

These two come up together because they touch the same health topic — not because they do the same job. Metoproterenol is a prescription medicine with approved uses on its FDA label. Kefir is a supplement: what follows is what researchers have looked at it for, and how strong that evidence is.

Kefir has been studied for:

Bronchitis studied, not established Kefir has been studied for this. Natural Medicines rates the evidence: Insufficient Reliable Evidence To Rate Read what the research shows

Kefir for bronchitis

Although there has been interest in using oral kefir for bronchitis, there is insufficient reliable information about the clinical effects of kefir for this purpose.

Effectiveness ratings and the research summaries above are the verbatim record from the Natural Medicines database, which grades evidence from “Effective” down to “Insufficient Reliable Evidence To Rate”. A rating below the top of that scale means researchers have looked at it — not that it works, and never that it can stand in for a prescribed medicine. Do not stop or replace Metoproterenol on your own; if you are taking Kefir for the same health topic, tell your prescriber, especially if the medicine is being adjusted to a target.

Everything else you take

See Every Supplement That Interacts With Metoproterenol

This page covers Kefir only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Metoproterenol page lists 15 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Black Tea (moderate), Caffeine (moderate), Cocoa (moderate), Coffee (moderate) and Cola Nut (moderate).

By severity: 15 moderate.

From our pharmacist’s overview on the Metoproterenol page

“Someone using metoproterenol (Alupent) for asthma or COPD is taking a beta-agonist, a drug that opens airways by stimulating the same receptors that speed the heart, and every one of the 15 supplement interactions on file works through that pathway. Twelve are caffeine sources, everyday things like coffee and tea, where large amounts c…”

Reviewed by 2 · Jul 18, 2026

Open the Metoproterenol interaction page

One more smart check

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

We hold 29 real supplement products containing Kefir, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Kefir. Even though Kefir itself has no known interaction with Metoproterenol, 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 Kefir and Metoproterenol 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 Kefir

Steady interest

#1,079 of 1,452 supplements looked up here in the last 7 days

29 days ago today

Medication Metoproterenol

Steady interest

#1,695 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 Kefir reference on this page ↓
Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Kefir and Metoproterenol 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 Dr. Brian Staiger, PharmD, BCPS.

Supplement

About Kefir

What is Kefir?

Digestive health
Source of probiotics
Lactose intolerance support
General immune support
Gut microbiome balance

Kefir is a fermented drink made by adding kefir grains to milk (or sugar water), creating a tangy beverage rich in probiotics. It is generally a safe, nutritious food that may support gut health, but strong evidence for treating specific medical conditions is still limited. If you have a weakened immune system or other health concerns, check with your pharmacist or doctor first.

Fermented milk or water with kefir grains (a culture of bacteria and yeast) · Drinkable fermented milk, water kefir, powdered or capsule probiotic products

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

Kefir: dosing

There is no official standardized dose for kefir because it is a food, not a regulated medicine. Many people drink anywhere from a few ounces to a cup per day, often starting small and increasing gradually to allow the gut to adjust.If you use a powdered or capsule probiotic product, follow the directions on the label.

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

Read the full Kefir monograph & all interactions

Medication

About Metaproterenol

What Is Metaproterenol Used For?

Brand name: Alupent

Metaproterenol is used to prevent and treat wheezing, shortness of breath, coughing, and chest tightness caused by asthma, chronic bronchitis, emphysema, and other lung diseases. It relaxes and opens air passages in the lungs, making it easier to breathe.

See full Metaproterenol drug information

Keep checking

Other Drugs & Kefir

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

0Major

121Moderate

1Minor

2,707No known interaction

121 Moderate 1 Minor 2,707 No interaction

Moderate

121 interactions

Showing 60 of 121 moderate interactions — see all 121 on the Kefir page.

Minor

1 interaction

Disulfiram ›

No interaction 2,707 drugs checked — show the list

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

Showing the 60 most looked-up of 2,707 medications checked with no known interaction — see the full Kefir list.

See the full Kefir interactions page

See every supplement checked against Metoproterenol, ranked by severity

Evidence & sources

Kefir References

The 10 references that drive our Kefir 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.

St-Onge MP, Farnworth ER, Savard T, et al. Kefir consumption does not alter plasma lipid levels or cholesterol fractional synthesis rates relative to milk in hyperlipidemic men: a randomized controlled trial [ISRCTN10820810]. BMC Complement Altern Med 200 PubMed
Murofushi M, Mizuguchi J, Aibara K, Matuhasi T. Immunopotentiative effect of polysaccharide from kefir grain, KGF-C, administered orally in mice. Immunopharmacology 1986;12:29-35. PubMed
Shiomi M, Sasaki K, Murofushi M, Aibara K. Antitumor activity in mice of orally administered polysaccharide from Kefir grain. Jpn J Med Sci Biol 1982;35:75-80. PubMed
Rimada PS, Abraham AG. Polysaccharide production by kefir grains during whey fermentation. J Dairy Res 2001;68:653-61. PubMed
De Vrese M, Keller B, Barth CA. Enhancement of intestinal hydrolysis of lactose by microbial beta-galactosidase (EC 3.2.1.23) of kefir. Br J Nutr 1992;67:67-75.
Athanasiadis, I., Boskou, D., Kanellaki, M., and Koutinas, A. A. Low-temperature alcoholic fermentation by delignified cellulosic material supported cells of kefir yeast. J.Agric.Food Chem. 1999;47(10):4474-4477. PubMed
Rabl, W., Liniger, B., Sutter, K., and Sigrist, T. [Ethanol content of Kefir water]. Blutalkohol 1994;31(2):76-79.
Fathi Y, Faghih S, Zibaeenezhad MJ, Tabatabaei SH. Kefir drink leads to a similar weight loss, compared with milk, in a dairy-rich non-energy-restricted diet in overweight or obese premenopausal women: a randomized controlled trial. Eur J Nutr. 2016;55(1) PubMed
Turan I, Dedeli Ö, Bor S, Ilter T. Effects of a kefir supplement on symptoms, colonic transit, and bowel satisfaction score in patients with chronic constipation: a pilot study. Turk J Gastroenterol. 2014;25(6):650-6. PubMed
Bellikci-Koyu E, Sarer-Yurekli BP, Karagozlu C, Aydin-Kose F, Ozgen AG, Buyuktuncer Z. Probiotic kefir consumption improves serum apolipoprotein A1 levels in metabolic syndrome patients: a randomized controlled clinical trial. Nutr Res 2022;102:59-70. 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 Kefir and Metoproterenol Together: Common Questions

Is it safe to take Kefir with Metoproterenol?

We do not list a known interaction between Kefir and Metoproterenol. 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.

Are Kefir and Metoproterenol used for the same thing?

They overlap in purpose, which usually means the real question is whether you need both rather than whether they are safe together. This page lists the shared uses and how strong the evidence is for Kefir in each. That is a conversation for your prescriber, especially if Metoproterenol is being adjusted to a target.

How was the Kefir and Metoproterenol combination checked?

Interactions in our licensed database are recorded against drug classes. Metoproterenol is filed under 1 classification, and Kefir has documented interactions with 2 drug classes — none of Metoproterenol'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 Kefir interact with any other medications?

Yes. Kefir has 122 documented drug interactions in our database — Metoproterenol 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 Metoproterenol interact with any supplements?

Yes. Metoproterenol has documented interactions with 15 supplements in our database — Kefir is not one of them. The Metoproterenol 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

Kefir monograph Uses, safety profile, and every drug interaction in one place Metaproterenol drug information The full plain-English guide to this medication Metoproterenol supplement interactions Every supplement checked against Metoproterenol, 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 10 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Metoproterenol and Kefir?

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.