Drug & supplement interaction

American Chestnut + Penicillin V Potassium

Penicillin V Potassium brand names: V-Cillin K, Veetids, Pen VK, Beepen-VK, Ledercillin, and others.

No Known Interaction
Medically reviewed by · Updated June 2026 · Pair last verified Sep 13, 2026
The bottom line No known interaction

We found no known interaction between American Chestnut and Penicillin V Potassium 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

American Chestnut and Penicillin V Potassium

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 Penicillin V Potassium and American Chestnut 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 American Chestnut at all — not against Penicillin V Potassium, 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.

American Chestnut safety at a glance

American Chestnut overall Use caution Little modern safety data exists, and the high tannin content can irritate the stomach or affect nutrient absorption.
Pregnancy Avoid There is not enough safety information, so it is best avoided during pregnancy.
Breastfeeding Avoid Safety while breastfeeding is unknown, so it is best avoided.

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

Still wondering about combining Penicillin V Potassium and American Chestnut? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

What Penicillin V Potassium’s Own FDA Label Lists

This is not an interaction — none of it involves American Chestnut. These are the most notable effects listed in the ADVERSE REACTIONS section of Penicillin V Potassium’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. 6 of them are worth acting on rather than waiting out — marked below.

  • A low platelet count Worth acting on
  • Anemia Worth acting on
  • A severe allergic reaction Worth acting on
  • Hives Worth acting on
  • A low white blood cell count Worth acting on
  • An allergic reaction Worth acting on
  • Fever
  • Swelling
  • Diarrhea
  • A skin rash

Showing the 10 most notable of 12 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 Penicillin V Potassium. Read the label on DailyMed › American Chestnut’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no American Chestnut side to compare — that is a limit of the record, not a statement that American Chestnut has no side effects.

Overlapping uses

What Penicillin V Potassium Is Prescribed For, and What American Chestnut Has Been Studied For

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

Penicillin V Potassium is prescribed for: Penicillin V Potassium treats mild to moderately severe bacterial infections caused by penicillin-sensitive bacteria. These include streptococcal infections (such as strep throat and scarlet fever), pneumococcal respiratory infections, mild staphylococcal skin and soft-tissue infections, and fusospirochetosis (Vincent's gingivitis and pharyngitis — a mouth and throat infection). It is also used as a preventive (prophylactic) therapy: on an ongoing basis to prevent rheumatic fever and chorea from coming back, and — as suggested by the American Heart Association and American Dental Association — to help guard against bacterial endocarditis (infection of the heart valves) in certain patients with heart conditions undergoing dental or upper respiratory tract procedures. It should not be used this way in patients at particularly high risk, such as those with prosthetic heart valves.

American Chestnut has been studied for:

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

    American Chestnut for pharyngitis

    Although there has been interest in using topical American chestnut for pharyngitis, there is insufficient reliable information about the clinical effects of American chestnut 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 Penicillin V Potassium on your own; if you are taking American Chestnut 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 Penicillin V Potassium

This page covers American Chestnut only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Penicillin V Potassium page lists 56 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Asarabacca (major), Siberian Cocklebur (major), Aristolochia (moderate) and Bacillus Coagulans (moderate).

Open the Penicillin V Potassium interaction page

One more smart check

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

We hold 4 real supplement products containing American Chestnut, each one broken down to its full ingredient list — and combination products often carry several ingredients besides American Chestnut. Even though American Chestnut itself has no known interaction with Penicillin V Potassium, 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 American Chestnut and Penicillin V 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 American Chestnut
Steady interest

#1,376 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Penicillin V Potassium
Steady interest

#2,182 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. American Chestnut is not yet covered by that licensed database, so its write-up cites publicly available medical sources directly (see the references below).
  • Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every American Chestnut reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The American Chestnut and Penicillin V Potassium records this page draws on were last updated June 22, 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 American Chestnut

What is American Chestnut?

American Chestnut
  • Cough and whooping cough
  • Respiratory ailments
  • Sore throat (topical/gargle)
  • Astringent for mucous membranes
  • Traditional tonic and sedative

American chestnut leaves and bark have a long history of folk use for coughs and respiratory complaints, mainly because of their tannin content, which has an astringent effect. However, there is very little modern scientific evidence to support these uses, and safety has not been well studied, so it should be used cautiously and discussed with a healthcare professional.

Castanea dentata · Fagaceae · Leaves and bark · Tea, liquid extract, dried leaf

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

American Chestnut: dosing

There is no standardized or well-established dose for American chestnut. Traditional use involved teas or extracts made from the dried leaves, but the amount of active compounds can vary widely depending on the product and how it is prepared.If you choose to use a product, follow the directions on the label and do not exceed them.

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

Read the full American Chestnut monograph & all interactions
Medication

About Penicillin V Potassium

What Is Penicillin V Potassium Used For?

Brand names: V-Cillin K, Veetids, Pen VK, Beepen-VK, Ledercillin, Pen-Vee K

Penicillin V Potassium treats mild to moderately severe bacterial infections caused by penicillin-sensitive bacteria. These include streptococcal infections (such as strep throat and scarlet fever), pneumococcal respiratory infections, mild staphylococcal skin and soft-tissue infections, and fusospirochetosis (Vincent's gingivitis and pharyngitis — a mouth and throat infection).

It is also used as a preventive (prophylactic) therapy: on an ongoing basis to prevent rheumatic fever and chorea from coming back, and — as suggested by the American Heart Association and American Dental Association — to help guard against bacterial endocarditis (infection of the heart valves) in certain patients with heart conditions undergoing dental or upper respiratory tract procedures. It should not be used this way in patients at particularly high risk, such as those with prosthetic heart valves.

Most-Reported Side Effects for Penicillin V Potassium

From FAERS, the FDA’s public side-effect reporting system (2,540 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Drug hypersensitivity 467 reports
Dyspnea 220 reports
Anxiety 180 reports
Hypersensitivity 155 reports
Asthma 146 reports
See full Penicillin V Potassium drug information
Keep checking

Other Drugs & American Chestnut

Browse every other medication we’ve checked against American Chestnut — 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 American Chestnut 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 American Chestnut list.

See the full American Chestnut interactions page
See every supplement checked against Penicillin V Potassium, ranked by severity
Evidence & sources

American Chestnut References

The 2 sources that drive our American Chestnut monograph — publicly available pages from reputable medical and government organizations. Every link was verified to work before publishing. American Chestnut is not covered by the licensed Natural Medicines interaction database, so its page cites these public sources directly.

  1. Tannins — MedlinePlus Source
  2. Herbs at a Glance — NIH NCCIH Source

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 American Chestnut and Penicillin V Potassium Together: Common Questions

Is it safe to take American Chestnut with Penicillin V Potassium?
We do not list a known interaction between American Chestnut and Penicillin V Potassium. 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 American Chestnut and Penicillin V Potassium 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 American Chestnut in each. That is a conversation for your prescriber, especially if Penicillin V Potassium is being adjusted to a target.
Does Penicillin V Potassium interact with any supplements?
Yes. Penicillin V Potassium has documented interactions with 56 supplements in our database — American Chestnut is not one of them. The Penicillin V Potassium 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

American Chestnut monograph Uses, safety profile, and every drug interaction in one place Penicillin V Potassium drug information The full plain-English guide to this medication Penicillin V Potassium supplement interactions Every supplement checked against Penicillin V Potassium, 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 2 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Penicillin V Potassium and American Chestnut?

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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.