Drug & supplement interaction

Ginger + Metronidazole, Tetracyline, Bismuth Subcitrate Potassium

Metronidazole, Tetracyline, Bismuth Subcitrate Potassium brand name: Pylera.

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

Ginger has a minor interaction with Metronidazole, Tetracyline, Bismuth Subcitrate Potassium. Theoretically, ginger might increase levels of metronidazole.

Read the full interaction report
SeverityMinor
LikelihoodPossible
EvidenceD
What do Severity, Likelihood & Evidence mean?
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Interaction report

Ginger and Metronidazole, Tetracyline, Bismuth Subcitrate Potassium

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

Minor

METRONIDAZOLE (Flagyl)

Theoretically, ginger might increase levels of metronidazole.
In an animal model, ginger increased the absorption and plasma half-life of metronidazole. In addition, the elimination rate and clearance of metronidazole was significantly reduced.
Severity Minor Likelihood Possible Evidence D

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.

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

Pylera is a combo capsule, and one of its three ingredients is the antibiotic metronidazole. There's a theory that ginger could nudge metronidazole levels a bit higher in your body. In an animal study, ginger helped the body absorb more metronidazole and slowed how fast it was cleared out, so a little more lingered around. Higher levels could, in theory, mean more of metronidazole's usual side effects, like a metallic taste, nausea, upset stomach, or headache.

I want to keep this in perspective, though. This is rated a minor interaction and is based only on lab and animal work, not people. Everyday ginger in food or tea is very unlikely to matter. If you're thinking about concentrated ginger supplements during your Pylera course, just run it by your pharmacist or doctor first.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Okonta JM, Uboh M, Obonga WO. Herb-Drug Interaction: A Case Study of Effect of Ginger on the Pharmacokinetic of Metronidazole in Rabbit. Indian Journal of Pharmaceutical Sciences (India) 2008;70(230):232. 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

Ginger Also Interacts With Other Medications

Ginger has 874 moderate, 132 minor known drug interactions in our database — the Metronidazole, Tetracyline, Bismuth Subcitrate Potassium one above is one of them. If you take anything else, check it against the full list below.

Moderate 874 Minor 132 No known interaction 1,824 (incl. Metronidazole, Tetracyline, Bismuth Subcitrate Potassium)
Taking anything else?

Check Another of Your Medications Against Ginger

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

From our Q&A

Questions About Ginger or Metronidazole, Tetracyline, Bismuth Subcitrate Potassium

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Ginger or Metronidazole, Tetracyline, Bismuth Subcitrate Potassium, 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, Tetracyline, Bismuth Subcitrate Potassium

This page covers Ginger only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Metronidazole, Tetracyline, Bismuth Subcitrate Potassium page lists 148 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Asarabacca (major), Beer (major), Oleander (major) and Siberian Cocklebur (major).

By severity: 6 major · 128 moderate · 14 minor.

From our pharmacist’s overview on the Metronidazole, Tetracyline, Bismuth Subcitrate Potassium page

“Alcohol is the risk to handle first with Pylera (metronidazole, tetracycline, and bismuth subcitrate potassium, usually prescribed for H. pylori stomach infections).”

Reviewed by 2 · Jul 18, 2026

Open the Metronidazole, Tetracyline, Bismuth Subcitrate Potassium interaction page

One more smart check

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

We hold 9,640 real supplement products containing Ginger, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Ginger. Your product may carry other ingredients that interact with Metronidazole, Tetracyline, Bismuth Subcitrate Potassium too, on top of Ginger — and those would not show on this page. Find your product and we’ll check every ingredient on its label:

How much people look this up

Where Ginger and Metronidazole, Tetracyline, Bismuth Subcitrate Potassium 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 Ginger
Top 5%

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

29 days ago today
Medication Metronidazole, Tetracyline, Bismuth Subcitrate Potassium
Top half

#881 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 Ginger

What is Ginger?

Ginger
  • Nausea and vomiting
  • Motion sickness
  • Morning sickness in pregnancy
  • Digestive upset
  • Menstrual cramps
  • Joint pain and inflammation

Ginger is a widely used culinary spice with a long history in traditional medicine, and it has the strongest evidence for helping with nausea and vomiting, including from motion sickness, pregnancy, and chemotherapy. It is generally safe in food and supplement amounts for most people, though it may cause mild stomach upset. Talk with your pharmacist or doctor before using ginger supplements, especially if you are pregnant, have a bleeding disorder, or take other medicines.

Read the full Ginger monograph & all interactions
Medication

About Bismuth, Metronidazole, and Tetracycline

What Is Bismuth, Metronidazole, and Tetracycline Used For?

Brand name: Pylera

This combination capsule treats Helicobacter pylori (H. pylori) infection in people who have a duodenal ulcer (an ulcer in the first part of the small intestine) or have had one within the past 5 years. It is always used together with omeprazole.

Clearing H. pylori has been shown to lower the chance that a duodenal ulcer comes back. The same use is listed for the generic bismuth subcitrate potassium, metronidazole and tetracycline hydrochloride capsules and for Pylera. It should only be used for infections proven or strongly suspected to be caused by bacteria.

See full Bismuth, Metronidazole, and Tetracycline drug information
Keep checking

Other Drugs & Ginger

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

0Major
874Moderate
132Minor
1,823No known interaction
874 Moderate 132 Minor 1,823 No interaction
Moderate

874 interactions

Showing 60 of 874 moderate interactions — see all 874 on the Ginger page.

Minor

132 interactions

Showing 60 of 132 minor interactions — see all 132 on the Ginger page.

No interaction 1,823 drugs checked — show the list

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

Showing the 60 most looked-up of 1,823 medications checked with no known interaction — see the full Ginger list.

See the full Ginger interactions page
See every supplement checked against Metronidazole, Tetracyline, Bismuth Subcitrate Potassium, 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
Ginger monograph › Uses, safety, and every drug interaction in one place Metronidazole, Tetracyline, Bismuth Subcitrate Potassium supplement interactions › Every supplement checked against Metronidazole, Tetracyline, Bismuth Subcitrate Potassium, ranked by severity Bismuth, Metronidazole, and Tetracycline 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 Ginger and Metronidazole, Tetracyline, Bismuth Subcitrate Potassium Together: Common Questions

Can you take Ginger with Metronidazole, Tetracyline, Bismuth Subcitrate Potassium?
There is only a minor interaction, which is usually not serious. Read the full details on this page and confirm with your pharmacist before combining them.
How serious is the Ginger and Metronidazole, Tetracyline, Bismuth Subcitrate Potassium interaction?
We rate it Minor. This interaction is generally not clinically significant, but it remains worth noting and discussing with your pharmacist.

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

Still Have a Question About Metronidazole, Tetracyline, Bismuth Subcitrate Potassium and Ginger?

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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.