Herb & supplement monograph

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

But these pages have grown well beyond that into a full monograph — what Kombucha 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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Kombucha 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 Kombucha drug interaction appears low for most people. None of the listed interactions are rated major, and every one rests on theoretical or animal evidence rather than confirmed effects in humans.

Interactions deserving the most attention

The main concern involves diabetes medications. Animal research shows kombucha can lower blood sugar, so in theory it could add to the effect of these drugs and increase the chance of low blood sugar, a possibility that matters more for people whose glucose is closely managed. Separately, kombucha can contain small amounts of alcohol, up to about 3.6%, so people taking disulfiram could in theory have an unpleasant alcohol-type reaction, though this is rated minor.

What the rest of the list means

Although kombucha appears alongside a large number of medications, that mostly reflects one theoretical blood-sugar effect applied across the many drugs used to treat diabetes. These predicted interactions come from animal studies, and none has been confirmed to cause meaningful problems in people, so a long list does not mean every combination is harmful.

Check your medications against Kombucha

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

Interaction report

Drugs that interact with Kombucha

87 medications have a known interaction with Kombucha, 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 Kombucha using our pharmacist-reviewed interaction data.

AI summaries are generated from our Kombucha 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 Kombucha 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 Kombucha affects

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

All 2 drug categories Kombucha interacts with

Antidiabetes DrugsDisulfiram (antabuse)

Antidiabetes Drugs

Theoretically, kombucha might increase the risk of hypoglycemia when taken with antidiabetes drugs.
Animal research shows that administering kombucha can lower blood glucose levels.

Likelihood Possible Evidence D

Disulfiram (Antabuse)

Theoretically, kombucha might cause a disulfiram reaction when taken with disulfiram.
Kombucha products can contain up to 3.6% alcohol.

Likelihood Possible Evidence D

Monograph

Kombucha: Uses, Safety & Side Effects

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

The bottom line

Kombucha is a fermented tea that many people enjoy as a probiotic-rich beverage, but solid human research proving specific health benefits is lacking. It is generally fine in moderate amounts for healthy adults, though homemade or unpasteurized versions can carry contamination risks. Pregnant people, those who are breastfeeding, and people with weakened immune systems should be cautious or avoid it.

Part used: Fermented sweetened tea (made with Camellia sinensis tea and a SCOBY culture)
Common forms: Bottled drink, homemade fermented tea, occasionally powders or supplements

People commonly use it for

General wellness and gut health
Digestion
Immune support
Energy and detox claims
Source of probiotics

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

Safety at a glance

OverallUse caution

Usually fine in moderation for healthy adults, but contamination and acidity can cause problems.

PregnancyPossibly Unsafe

When used orally; avoid using.

Read the full pregnancy detail

BreastfeedingPossibly Unsafe

When used orally; avoid using.

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

Kombucha is a slightly fizzy, tangy drink made by fermenting sweetened tea. The tea usually comes from the Camellia sinensis plant, the same plant used to make green and black tea. A special culture called a SCOBY (a symbiotic culture of bacteria and yeast) is added to the sweet tea and allowed to ferment for a week or more.

During fermentation, the bacteria and yeast turn sugar into acids, gases, and tiny amounts of alcohol. This gives kombucha its sour taste and fizz. It has been used as a folk drink for many years, especially in parts of Asia and Eastern Europe, and is now popular worldwide as a "health" beverage.

People drink it for general wellness, gut health, and as a source of probiotics. It is sold bottled in stores or made at home.

How it works

Kombucha contains a mix of live bacteria and yeast, organic acids (such as acetic acid), small amounts of B vitamins, and antioxidants that come from the tea itself, like polyphenols.

Researchers think the probiotics and acids might support a healthy balance of gut bacteria, and the tea antioxidants may help reduce cell-damaging molecules called free radicals. The acetic acid gives kombucha mild antimicrobial properties in the lab.

It is important to know that most of these proposed effects are based on test-tube or animal studies, not strong human trials. The exact amounts of probiotics and active compounds also vary a lot from one batch or brand to another.

Effectiveness

Does Kombucha work?

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

Evidence overview · 5 uses evaluated

5 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.

For Kombucha, current evidence isn’t strong enough to rate any specific use. The conditions it has been studied for are listed below.

Also studied for 5 conditions — evidence insufficient to rate

Insufficient Reliable Evidence To Rate Aging