Drug & supplement interaction

Pedunculate Oak + Varenicline

Varenicline brand names: Chantix, Champix, Tyrvaya.

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 Pedunculate Oak and Varenicline 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 Varenicline states a food rule worth keeping to.

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Interaction report

Pedunculate Oak and Varenicline

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 Varenicline and Pedunculate Oak 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.

Worth understanding: our licensed dataset holds no drug-interaction record for Pedunculate Oak at all — not against Varenicline, and not against any other medication we track. This verdict therefore rests on the absence of any recorded data, not on research that looked at this combination and found nothing. We cannot rule an interaction out.

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.

Pedunculate Oak safety at a glance

Pedunculate Oak overall Use caution Generally used short-term for minor complaints, but the high tannin content can irritate the stomach and is not meant for long-term use.
Pregnancy Avoid There is not enough reliable safety information, so it is best avoided during pregnancy.
Breastfeeding Avoid Safety while breastfeeding is unknown, so avoid use unless advised by your doctor.

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

Still wondering about combining Varenicline and Pedunculate Oak? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

What Varenicline’s Own FDA Label Lists

This is not an interaction — none of it involves Pedunculate Oak. These are the most notable effects listed in the ADVERSE REACTIONS section of Varenicline’s own FDA label, for the medication by itself. Knowing the drug’s own list makes it easier to work out the likely cause if something new turns up while you take both. 10 of them are worth acting on rather than waiting out — marked below.

  • Kidney stones Worth acting on
  • Mania or an unusually elevated mood Worth acting on
  • Loss of vision Worth acting on
  • Dependence or withdrawal symptoms Worth acting on
  • Thoughts of self-harm Worth acting on
  • Hearing loss Worth acting on
  • A stroke or mini-stroke Worth acting on
  • A bowel blockage Worth acting on
  • Bone thinning Worth acting on
  • Memory problems Worth acting on

Showing the 10 most notable of 87 label-listed effects — ranked by how unusual each one is across medicines generally, with serious effects weighted up.

From the ADVERSE REACTIONS section of the FDA label for Varenicline. Read the label on DailyMed › Pedunculate Oak’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no Pedunculate Oak side to compare — that is a limit of the record, not a statement that Pedunculate Oak has no side effects.

How to take them

Some Varenicline Products Have a Food Rule — Pedunculate Oak Should Not Break It

At least one FDA label for a product containing Varenicline says to take it with food. If you take Pedunculate Oak on an empty stomach out of habit, keep them separate — and take Varenicline 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 Varenicline 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.

Varenicline tablets should be taken orally after eating and with a full glass of water.

From the Dosage and Administration section of the FDA label we read for Varenicline — where that label names a specific product, the instruction is that product's. Read the label on DailyMed ›

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.

Everything else you take

See Every Supplement That Interacts With Varenicline

This page covers Pedunculate Oak only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Varenicline page lists 20 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Beer (moderate), Coffee Charcoal (moderate), European Mandrake (moderate) and Glucomannan (moderate).

By severity: 1 major · 10 moderate · 9 minor.

From our pharmacist’s overview on the Varenicline page

“For anyone taking varenicline (Chantix, Champix, Tyrvaya) to quit smoking, this list earns real caution rather than a quick skim. Activated charcoal is the single entry rated major; it binds many medicines in the gut and can pull varenicline's blood levels down, and losing that support mid-quit is a genuine setback.”

Reviewed by 2 · Jul 18, 2026

Open the Varenicline interaction page

How much people look this up

Where Pedunculate Oak and Varenicline 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 Pedunculate Oak
Steady interest

#1,362 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Varenicline
Steady interest

#2,270 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 Pedunculate Oak reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Pedunculate Oak and Varenicline 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 Pedunculate Oak

What is Pedunculate Oak?

  • Diarrhea
  • Sore throat and mouth inflammation
  • Skin irritation and minor wounds
  • Hemorrhoids
  • Excessive sweating

Pedunculate oak bark is a traditional astringent remedy used mainly for mild diarrhea, sore throat, and skin or anal irritation, thanks to its high tannin content. Evidence comes mostly from tradition and laboratory studies rather than strong human trials, so use it short-term and check with a pharmacist or doctor before trying it.

Quercus robur · Fagaceae · Bark, and sometimes the galls and acorns · Dried bark for tea or decoction, liquid extracts, and bark powder for compresses, baths, or gargles

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

Pedunculate Oak: dosing

There is no single standardized dose of pedunculate oak bark that applies to everyone, and amounts vary by product and how it is used (tea, gargle, wash, or bath).The best approach is to follow the directions on the product label and not exceed them. Traditional use generally limits internal use to a few days only.

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

Read the full Pedunculate Oak monograph & all interactions
Medication

About Varenicline

What Is Varenicline Used For?

Brand names: Chantix, Champix, Tyrvaya

Varenicline tablets — sold under brand names including Chantix — are used to help adults quit smoking. They work as part of a structured smoking cessation program.

Tyrvaya (varenicline solution) nasal spray is a separate product used to treat the signs and symptoms of dry eye disease. It is not used for smoking cessation.

Most-Reported Side Effects for Varenicline

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.

Nausea 14,514 reports
Depression 8,686 reports
Abnormal dreams 7,841 reports
Anxiety 5,978 reports
Insomnia 5,620 reports
See full Varenicline drug information
Keep checking

Other Drugs & Pedunculate Oak

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

0Major
0Moderate
0Minor
2,829No known interaction
2,829 No interaction
No interaction 2,829 drugs checked — show the list

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

Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full Pedunculate Oak list.

See the full Pedunculate Oak interactions page
See every supplement checked against Varenicline, ranked by severity
Evidence & sources

Pedunculate Oak References

The 1 references that drive our Pedunculate Oak 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. Weber RW. Allergen of the Month--English Oak. Ann Allergy Asthma Immunol. 2015 Nov;115(5):A13. 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 Pedunculate Oak and Varenicline Together: Common Questions

Is it safe to take Pedunculate Oak with Varenicline?
We do not list a known interaction between Pedunculate Oak and Varenicline. 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 Pedunculate Oak and Varenicline at the same time of day?
At least one FDA label for a product containing Varenicline says to take it with food. If you take Pedunculate Oak on an empty stomach out of habit, keep them separate and take Varenicline with a meal where the label says to. Food instructions belong to the product rather than the ingredient — two Varenicline products can differ — so check the directions on your own box. This is about absorption, not an interaction.
Does Varenicline interact with any supplements?
Yes. Varenicline has documented interactions with 20 supplements in our database — Pedunculate Oak is not one of them. The Varenicline 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

Pedunculate Oak monograph Uses, safety profile, and every drug interaction in one place Varenicline drug information The full plain-English guide to this medication Varenicline supplement interactions Every supplement checked against Varenicline, 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 1 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Varenicline and Pedunculate Oak?

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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.