Drug & supplement interaction

Bach Flower Remedies + Metronidazole

Metronidazole brand names: Flagyl, Protostat, Metronidazole, Nidazol, Trikacide, and others.

Moderate Interaction
Medically reviewed by · Updated September 2026
The bottom line Moderate

Bach Flower Remedies has a moderate interaction with Metronidazole. Bach flower remedies might cause a disulfiram-like reaction when taken with metronidazole.

Read the full interaction report
SeverityModerate
LikelihoodProbable
EvidenceC
What do Severity, Likelihood & Evidence mean?
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Interaction report

Bach Flower Remedies and Metronidazole

Here is the interaction we found between these two, with the evidence behind it.

Moderate

METRONIDAZOLE (Flagyl)

Bach flower remedies might cause a disulfiram-like reaction when taken with metronidazole.
Bach flower remedies are preserved in brandy and contain alcohol. Metronidazole might cause a disulfiram-like reaction when taken with alcohol.
Severity Moderate Likelihood Probable Evidence C

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..

Dr. Brian Staiger, PharmD, BCPS
Dr. Brian Staiger explains PharmD, Clinical Pharmacist

Here's the thing to know about this pairing: metronidazole doesn't mix well with alcohol, and Bach Flower Remedies are usually preserved in brandy. When you drink alcohol while taking metronidazole, it can trigger what we call a disulfiram-like reaction. That can mean flushing, a pounding headache, nausea, vomiting, stomach cramps, and a fast or racing heartbeat. Not fun.

Now, a single drop or two carries only a tiny bit of alcohol, so the real-world risk is usually small. Still, why chance feeling miserable? It's safest to hold off on alcohol-based remedies while you're on metronidazole and for a few days after you finish. There are alcohol-free Bach options too. Check with your pharmacist or doctor if you're unsure.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Fraser AG. Pharmacokinetic interactions between alcohol and other drugs. Clin Pharmacokinet 1997;33:79-90. PubMed

What These Ratings Mean

Every interaction above is graded three ways — here’s the key to each label.

Severity how clinically significant the interaction is
Major

Clinically significant. Avoid the combination, or use only under close professional supervision.

Moderate

Usually worth avoiding or managing — may need monitoring, a dose change, or timing apart.

Minor

Generally not serious. Be aware of it and mention it to your pharmacist.

Likelihood how strong the evidence is that the interaction actually happens in people
  • LikelyWell-controlled human studies have demonstrated the likely existence of this interaction.
  • ProbableInteraction 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.
  • PossibleInteraction 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.
  • UnlikelyInteraction has been demonstrated in animal or in lab research but has been shown not to occur in humans.
Evidence the quality of the studies behind the rating (graded A–D)
  • AHigh-quality meta-analysis (quantitative systematic review).
  • BCase-control study.
  • CConsensus.
  • DAnecdotal evidence.

These ratings are for information only. Never start, stop, or otherwise change your therapy before speaking with your provider.

Keep it in perspective

Bach Flower Remedies Also Interacts With Other Medications

Bach Flower Remedies has 1 major, 2 moderate known drug interactions in our database — the Metronidazole one above is one of them. If you take anything else, check it against the full list below.

Major 1 Moderate 2 No known interaction 2,827 (incl. Metronidazole)
Taking anything else?

Check Another of Your Medications Against Bach Flower Remedies

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

From our Q&A

Questions About Bach Flower Remedies or Metronidazole

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Bach Flower Remedies or Metronidazole, 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 Metronidazole

This page covers Bach Flower Remedies only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Metronidazole page lists 83 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), American Hellebore (major), Arsenic (major), Cesium (major) and Ephedra (major).

By severity: 7 major · 63 moderate · 13 minor.

From our pharmacist’s overview on the Metronidazole page

“Metronidazole (Flagyl) can stretch the heart's QT interval on its own, and most of the seven major-rated interactions among its 83 flagged supplement ingredients do the same thing, so I read this list with more wariness than most antibiotics earn. Grapefruit and ephedra stand out for adding to that heart-rhythm risk, while activated ch…”

Reviewed by 2 · Jul 18, 2026

Open the Metronidazole interaction page

How much people look this up

Where Bach Flower Remedies and Metronidazole 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 Bach Flower Remedies
Top half

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

29 days ago today
Medication Metronidazole
Top half

#835 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.

Supplement

About Bach Flower Remedies

What is Bach Flower Remedies?

Bach Flower Remedies
  • Stress and anxiety
  • Emotional balance
  • Fear and worry
  • Low mood
  • Sleep difficulties
  • Coping during stressful events

Bach Flower Remedies are extremely diluted flower preparations promoted to support emotional well-being rather than treat physical illness. High-quality research has not shown they work better than a placebo, but they are generally considered low-risk. The main concern is their alcohol (brandy) content, especially for children, people avoiding alcohol, and during pregnancy or breastfeeding.

Read the full Bach Flower Remedies monograph & all interactions
Medication

About Metronidazole

What Is Metronidazole Used For?

Brand names: Flagyl, Protostat, Metronidazole, Nidazol, Trikacide, MetroGel, Flagyl IV, Metronidazole Redi-Infusion, Flagyl IV RTU, Metro IV, Anabact, Metrosa, Metrotop, Noritate, Rozex Cream, Rozex Gel, Zyomet, Likmez

Metronidazole treats infections caused by certain parasites and by bacteria that grow without oxygen (anaerobic bacteria). Which use applies depends on the product.

Oral products (tablets, capsules and Likmez suspension) are used for trichomoniasis, a sexually transmitted infection. Likmez is also used for amebiasis and for anaerobic bacterial infections in adults. Metronidazole injection treats serious anaerobic infections. Vaginal gels treat bacterial vaginosis. Topical cream and lotion treat rosacea.

See full Metronidazole drug information
Keep checking

Other Drugs & Bach Flower Remedies

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

1Major
2Moderate
0Minor
2,826No known interaction
1 Major 2 Moderate 2,826 No interaction
Major

1 interaction

Moderate

2 interactions

No interaction 2,826 drugs checked — show the list

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

Showing the 60 most looked-up of 2,826 medications checked with no known interaction — see the full Bach Flower Remedies list.

See the full Bach Flower Remedies interactions page
See every supplement checked against Metronidazole, ranked by severity
Sources

Sources & How We Checked

Interaction details are evidence-graded and sourced from the Natural Medicines database. The medication overview comes from MedlinePlus.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

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

Keep exploring
Bach Flower Remedies monograph › Uses, safety, and every drug interaction in one place Metronidazole supplement interactions › Every supplement checked against Metronidazole, ranked by severity Metronidazole drug information › The full plain-English guide to this medication Supplement interaction checker › Check any supplement or product against your medications Browse medications A–Z › Every drug we've checked against herbs & supplements Ask a pharmacist › Free, personal answer from our licensed team
Pharmacist Counseling Corner

Taking Bach Flower Remedies and Metronidazole Together: Common Questions

Can you take Bach Flower Remedies with Metronidazole?
There is a moderate interaction, so it may be acceptable with monitoring or timing changes — but check with your pharmacist first. Read the full details on this page and confirm with your pharmacist before combining them.
How serious is the Bach Flower Remedies and Metronidazole interaction?
We rate it Moderate. This combination may require monitoring, a dose adjustment, or separating the times you take each one. Consult your pharmacist before using them together.

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

Still Have a Question About Metronidazole and Bach Flower Remedies?

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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.