Drug & supplement interaction

Bistort + Acetaminophen, Diphenhydramine, Pseudoephedrine

Acetaminophen, Diphenhydramine, Pseudoephedrine brand names: Contac Night Allergy Relief, Children's Tylenol Allergy, Cold Control.

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 Bistort and Acetaminophen, Diphenhydramine, Pseudoephedrine 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

Bistort and Acetaminophen, Diphenhydramine, Pseudoephedrine

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 Acetaminophen, Diphenhydramine, Pseudoephedrine and Bistort 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 Bistort at all — not against Acetaminophen, Diphenhydramine, Pseudoephedrine, 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.

Bistort safety at a glance

Bistort overall Use caution Limited human safety data; its high tannin content can irritate the stomach with heavy or long-term use.
Pregnancy Avoid Not enough safety information, so it is best avoided during pregnancy.
Breastfeeding Avoid Safety while breastfeeding is unknown, so avoid use.

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

Still wondering about combining Acetaminophen, Diphenhydramine, Pseudoephedrine and Bistort? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
Everything else you take

See Every Supplement That Interacts With Acetaminophen, Diphenhydramine, Pseudoephedrine

This page covers Bistort only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Acetaminophen, Diphenhydramine, Pseudoephedrine page lists 292 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: 1,4-butanediol (major), Activated Charcoal (major), Asarabacca (major), Beer (major) and Ephedra (major).

By severity: 15 major · 234 moderate · 43 minor.

From our pharmacist’s overview on the Acetaminophen, Diphenhydramine, Pseudoephedrine page

“A drink with this medicine is the risk I would flag first. Beer and wine both carry major ratings, well documented in humans, because alcohol deepens the sedation that diphenhydramine already causes.”

Reviewed by 2 · Jul 18, 2026

Open the Acetaminophen, Diphenhydramine, Pseudoephedrine interaction page

One more smart check

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

We hold 8 real supplement products containing Bistort, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Bistort. Even though Bistort itself has no known interaction with Acetaminophen, Diphenhydramine, Pseudoephedrine, 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 Bistort and Acetaminophen, Diphenhydramine, Pseudoephedrine 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 Bistort
Top half

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

29 days ago today
Medication Acetaminophen, Diphenhydramine, Pseudoephedrine
Top 25%

#364 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. Bistort 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 Bistort reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Bistort and Acetaminophen, Diphenhydramine, Pseudoephedrine records this page draws on were last updated June 20, 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 Bistort

What is Bistort?

  • Diarrhea
  • Mouth and throat irritation
  • Minor wounds and skin issues
  • Digestive upset
  • Sore throat and cough

Bistort is a traditional herb whose root is rich in tannins and has long been used for diarrhea, sore throat, and minor wounds. Modern human studies are very limited, so its true effectiveness and long-term safety are not well established. If you want to try it, talk with your pharmacist or doctor first, and avoid it during pregnancy and breastfeeding.

Bistorta officinalis · Polygonaceae · Rhizome (root), and sometimes the leaves · Dried root, tea (decoction), tincture, mouth rinse or gargle, powder

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

Bistort: dosing

There is no well-established, standardized dose for bistort. Because human studies are limited, experts cannot recommend a specific safe and effective amount.If you choose to use a bistort product, follow the directions on the label and do not exceed them. They can help you decide whether it is appropriate for you.

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

Read the full Bistort monograph & all interactions
Keep checking

Other Drugs & Bistort

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

See the full Bistort interactions page
See every supplement checked against Acetaminophen, Diphenhydramine, Pseudoephedrine, ranked by severity
Evidence & sources

Bistort References

The 1 sources that drive our Bistort monograph — publicly available pages from reputable medical and government organizations. Every link was verified to work before publishing. Bistort is not covered by the licensed Natural Medicines interaction database, so its page cites these public sources directly.

  1. 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 Bistort and Acetaminophen, Diphenhydramine, Pseudoephedrine Together: Common Questions

Is it safe to take Bistort with Acetaminophen, Diphenhydramine, Pseudoephedrine?
We do not list a known interaction between Bistort and Acetaminophen, Diphenhydramine, Pseudoephedrine. 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.
Does Acetaminophen, Diphenhydramine, Pseudoephedrine interact with any supplements?
Yes. Acetaminophen, Diphenhydramine, Pseudoephedrine has documented interactions with 292 supplements in our database — Bistort is not one of them. The Acetaminophen, Diphenhydramine, Pseudoephedrine 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

Bistort monograph Uses, safety profile, and every drug interaction in one place Acetaminophen, Diphenhydramine, Pseudoephedrine supplement interactions Every supplement checked against Acetaminophen, Diphenhydramine, Pseudoephedrine, 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 Acetaminophen, Diphenhydramine, Pseudoephedrine and Bistort?

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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.