Medication interaction hub

What Supplements Interact with Bismuth Subsalicylate (OTC drug)?

Bismuth Subsalicylate (OTC drug) brand names: Pepto-Bismol, Kaopectate Anti-Diarrheal Caplets (U.S.), Maalox Total Stomach Relief, Maalox Multi Action, Kaopectate Liquid (U.S.), and others. Every interaction below applies to the brands too.

17 Interactions 1 Major 7 Moderate 9 Minor
Curated & coded by · Clinical Pharmacist · Updated September 25, 2026

Drug–supplement interaction data sourced from Natural Medicines Pro, the licensed clinical database from TRC Healthcare / Therapeutic Research, with additional analysis by the HelloPharmacist Pharmacist Team. Our sources · Editorial policy

What is this page for?

One answer, for one medication: what supplements and herbal products interact with Bismuth Subsalicylate (OTC drug)? Every vitamin, herb, and supplement ingredient we’ve checked against it is on this page, ranked by severity, each linking to the full report for that exact pair.

This page covers supplement interactions only — to check Bismuth Subsalicylate (OTC drug) against your other medications, use the drug–drug interaction checker. Educational information from our licensed clinical databases, not medical advice. Our editorial policy

HelloPharmacist Bottom Line
Our Pharmacist Explains
What is this? The interaction data in the HelloPharmacist supplement database is licensed from Natural Medicines Pro by TRC Healthcare (Therapeutic Research). HelloPharmacist pharmacists often add our own analysis and context on top of that licensed data — such as this Bottom Line summary and the notes on individual interaction pages — and any such commentary is noted as ours.

Everything on this page interacts with bismuth subsalicylate (Pepto-Bismol, Kaopectate) the same basic way, by changing how much of the medicine your gut actually absorbs, and one entry deserves genuine caution. Activated charcoal, the only major-rated interaction of the 17, is another stomach remedy people often take at the same time, and it binds bismuth subsalicylate along with many other drugs, sharply cutting how much reaches you. The rest are mostly gel-forming fibers and gums such as psyllium and glucomannan.

Seven of the other entries rate moderate and nine minor, mostly on theoretical or lab evidence rather than human studies. European mandrake works the opposite way, slowing the gut so more drug may get through. Since this is a short-term stomach remedy, the simple fix is to pause fiber supplements while you need it, or space the doses well apart. Charcoal is different. Skip that pairing unless a pharmacist has weighed in.

— , Clinical Pharmacist · July 18, 2026

Major 1 Moderate 7 Minor 9 No known interaction 1,435

This box checks one ingredient at a time (like turmeric or magnesium). Taking a supplement product with a whole label of ingredients? Search the product instead — we check every ingredient on it ↓

Top Ingredient Interactions

Bismuth Subsalicylate (OTC drug): Top Interactions at a Glance

The most significant Bismuth Subsalicylate (OTC drug) supplement & herbal interactions, colored by severity. Tap any ingredient to open the full report for that pair.

Showing the 12 highest-ranked of 17 interacting ingredients — plus 1,435 more checked with no known interaction. See the complete ranked list.

Start here

The Major Interactions to Know About

The most clinically significant Bismuth Subsalicylate (OTC drug) + supplement combinations in our database, best-documented first. Open any card for the full report.

Major Likelihood Probable Activated Charcoal + Bismuth Subsalicylate (OTC drug)i

Activated charcoal reduces systemic exposure to many drugs, including those that undergo enterohepatic recirculation, regardless of the route of administration.

Read the full interaction
The complete list

Every Supplement Checked Against Bismuth Subsalicylate (OTC drug)

All 1,452 ingredients in our database, ranked by severity — 17 with a Bismuth Subsalicylate (OTC drug) interaction on file and 1,435 with none found. Filter by severity or search any ingredient; hover the for what each ingredient is.

Looking for an interaction with a specific supplement product? Search products instead ↓

Straight answers

Can You Take It With Bismuth Subsalicylate (OTC drug)?

One-line answers, one card per combination — scroll through today’s 20 and tap any card for the full report. A different set rotates in daily until every combination has had its turn.

Can you take Gum Arabic with Bismuth Subsalicylate (OTC drug)?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, gum arabic can alter the absorption of oral drugs due to its fiber content.

Full Gum Arabic + Bismuth Subsalicylate (OTC drug) answer

Can you take Coffee Charcoal with Bismuth Subsalicylate (OTC drug)?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Coffee charcoal can reduce the absorption of orally administered drugs and should be separated from oral drug administration by at least two...

Full Coffee Charcoal + Bismuth Subsalicylate (OTC drug) answer

Can you take European Mandrake with Bismuth Subsalicylate (OTC drug)?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, concurrent use might increase absorption of some drugs because of inhibited gastrointestinal (GI) motility caused by European...

Full European Mandrake + Bismuth Subsalicylate (OTC drug) answer

Can you take Glucomannan with Bismuth Subsalicylate (OTC drug)?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, glucomannan may decrease absorption of drugs taken orally.

Full Glucomannan + Bismuth Subsalicylate (OTC drug) answer

Can you take Guar Gum with Bismuth Subsalicylate (OTC drug)?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.

Full Guar Gum + Bismuth Subsalicylate (OTC drug) answer

Can you take Slippery Elm with Bismuth Subsalicylate (OTC drug)?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, slippery elm may slow the absorption and reduce serum levels of oral drugs.

Full Slippery Elm + Bismuth Subsalicylate (OTC drug) answer

Can you take Tragacanth with Bismuth Subsalicylate (OTC drug)?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, tragacanth might alter absorption of oral drugs.

Full Tragacanth + Bismuth Subsalicylate (OTC drug) answer

Can you take Thyroid Extract with Bismuth Subsalicylate (OTC drug)?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Food and medications can interfere with thyroid hormone absorption.

Full Thyroid Extract + Bismuth Subsalicylate (OTC drug) answer

Can you take Agar with Bismuth Subsalicylate (OTC drug)?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Agar forms a thick gel, which may disrupt the absorption of nutrients and medications.

Full Agar + Bismuth Subsalicylate (OTC drug) answer

Can you take Algin with Bismuth Subsalicylate (OTC drug)?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, algin can alter the absorption of oral drugs.

Full Algin + Bismuth Subsalicylate (OTC drug) answer

Can you take Black Psyllium with Bismuth Subsalicylate (OTC drug)?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.

Full Black Psyllium + Bismuth Subsalicylate (OTC drug) answer

Can you take Blond Psyllium with Bismuth Subsalicylate (OTC drug)?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.

Full Blond Psyllium + Bismuth Subsalicylate (OTC drug) answer

Can you take Carob with Bismuth Subsalicylate (OTC drug)?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, carob might also impair the absorption of oral drugs.

Full Carob + Bismuth Subsalicylate (OTC drug) answer

Can you take Karaya Gum with Bismuth Subsalicylate (OTC drug)?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Co-administration of oral drugs with bulk forming laxatives such as karaya gum may decrease, increase, or have no effect on the absorption o...

Full Karaya Gum + Bismuth Subsalicylate (OTC drug) answer

Can you take Marshmallow with Bismuth Subsalicylate (OTC drug)?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, mucilage in marshmallow might impair absorption of oral drugs.

Full Marshmallow + Bismuth Subsalicylate (OTC drug) answer

Can you take Xanthan Gum with Bismuth Subsalicylate (OTC drug)?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, xanthan gum can alter the absorption of oral drugs due to its fiber qualities.

Full Xanthan Gum + Bismuth Subsalicylate (OTC drug) answer

Can you take Activated Charcoal with Bismuth Subsalicylate (OTC drug)?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. Activated charcoal reduces systemic exposure to many drugs, including those that undergo enterohepatic recirculation, regardless of the rout...

Full Activated Charcoal + Bismuth Subsalicylate (OTC drug) answer

Can you take Coffee Charcoal with Bismuth Subsalicylate (OTC drug)?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Coffee charcoal can reduce the absorption of orally administered drugs and should be separated from oral drug administration by at least two...

Full Coffee Charcoal + Bismuth Subsalicylate (OTC drug) answer

Can you take European Mandrake with Bismuth Subsalicylate (OTC drug)?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, concurrent use might increase absorption of some drugs because of inhibited gastrointestinal (GI) motility caused by European...

Full European Mandrake + Bismuth Subsalicylate (OTC drug) answer

Can you take Glucomannan with Bismuth Subsalicylate (OTC drug)?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, glucomannan may decrease absorption of drugs taken orally.

Full Glucomannan + Bismuth Subsalicylate (OTC drug) answer
Read the list like a pharmacist

What Severity, Likelihood & Evidence Mean

Severity — How Serious It Can Be

  • Major. Clinically significant; generally best avoided, or used only under direct professional supervision.
  • Moderate. May need monitoring, a dose adjustment, or separating the times you take each one.
  • Minor. Generally not clinically significant, but still worth noting and mentioning to your pharmacist.
  • No known interaction. Checked against our sources with nothing documented — not the same as proven safety.

Likelihood — How Well It’s Documented

  • Likely. Well-controlled human studies have demonstrated the likely existence of this interaction
  • Probable. 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.
  • Possible. 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
  • Unlikely. Interaction has been demonstrated in animal or in lab research but has been shown not to occur in humans.

Where This Data Comes From

  • Interaction records are evidence-graded and sourced from the Natural Medicines database (TRC Healthcare), the same reference used by pharmacists and hospitals.
  • Each entry links to a full report with the clinical detail, likelihood, evidence level, and citations for that exact combination.
  • Content is reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

How Does Our Interaction Checker Work?

Behind every verdict on this page is a category system. Our source database doesn’t document supplement interactions drug-by-drug — it documents them against groups of medications that behave the same way (for example, “drugs processed by the CYP3A4 liver enzyme” or “blood-thinning medications”).

So the check works in three steps: (1) Bismuth Subsalicylate (OTC drug) is classified into the pharmacology categories it belongs to, (2) every supplement interaction documented against any of those categories is inherited by Bismuth Subsalicylate (OTC drug), and (3) each ingredient keeps its own severity, likelihood, and evidence grades from the underlying record. That’s why one supplement can carry several records for one drug — it may interact through more than one category.

Bismuth Subsalicylate (OTC drug) sits in 1 interaction category. Open any one to see what the group means:

Oral Drugs 17 ingredients

A pharmacology grouping from our source database: medications in this group share a property that certain supplements are known to interact with, so an interaction documented for the group applies to every drug in it.

17 of the supplement ingredients on this page reach Bismuth Subsalicylate (OTC drug) through this category.

About Bismuth Subsalicylate (OTC drug)

An antidiarrheal medication used to treat diarrhea, heartburn, and upset stomach.

Generic name: Bismuth Subsalicylate (OTC drug)  ·  Brand names: Pepto-Bismol, Kaopectate Anti-Diarrheal Caplets (U.S.), Maalox Total Stomach Relief, Maalox Multi Action, Kaopectate Liquid (U.S.), Kaopectate Extra Strength Liquid (U.S.).

See the full Bismuth Subsalicylate drug information
Check a real product

Take a Supplement Product? Check the Whole Bottle Against Bismuth Subsalicylate (OTC drug)

Most supplements are combination products — and the interaction may come from an ingredient you didn’t buy it for. Search any product below (or scan its label) and we’ll check every ingredient on it against Bismuth Subsalicylate (OTC drug).

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Products that contain Bismuth Subsalicylate (OTC drug)-interacting ingredients

Real supplements from the NIH label database that contain the top interacting ingredients on this page — each one is worth a full label check before combining with Bismuth Subsalicylate (OTC drug).

SunFiber by Tomorrow's Nutrition Pro contains Guar Gum Fiber Fusion Daily 3.1 g by Nature's Way contains Guar Gum Mightiest Vite Tasty Fruit Punch Flavor by Little DaVinci contains Guar Gum Digestion Support by NaturesPlus AgeLoss contains Guar Gum
Pharmacist Counseling Corner

Bismuth Subsalicylate (OTC drug) & Supplements: Common Questions

What supplements interact with Bismuth Subsalicylate (OTC drug)?
More than you might expect — 17 in total, though they are far from equal: 1 are rated major, 7 moderate, and 9 minor. The ranked list on this page puts the ones that genuinely matter first, and every entry opens a full report on that exact pair. The highest-ranked right now: Activated Charcoal, Coffee Charcoal, European Mandrake.
Which Bismuth Subsalicylate (OTC drug) supplement interactions are the most serious?
The 1 major-rated combination — led by Activated Charcoal — deserve real caution: these are the ones generally best avoided, or used only with your prescriber watching. If you take any of them today, don't panic and don't stop anything abruptly — call your pharmacist first. Jump to the ranked list.
Can I take vitamins or supplements while on Bismuth Subsalicylate (OTC drug)?
Usually yes — most people on Bismuth Subsalicylate (OTC drug) can take most supplements. The catch is the exceptions, and they aren't always the exotic ones (St. John's Wort trips up more prescriptions than almost anything sold next to it). Look up each ingredient you actually take in the list above, and treat "no known interaction" as a green-ish light, not a guarantee. Try the label scanner or the interaction checker.
Do brands like Pepto-Bismol have the same supplement interactions as Bismuth Subsalicylate (OTC drug)?
Yes — Pepto-Bismol, Kaopectate Anti-Diarrheal Caplets (U.S.), Maalox Total Stomach Relief, Maalox Multi Action, Kaopectate Liquid (U.S.) and other brands all contain Bismuth Subsalicylate (OTC drug), so everything on this page applies to them equally. Interactions belong to the active drug, never to the brand on the box; the same is true of generics.
Where do these interaction ratings come from?
Every rating comes from the Natural Medicines database — the same evidence-graded reference pharmacists and hospitals use — and each interaction carries three separate grades: severity (how bad it can be), likelihood (how well it's documented in studies and case reports), and an evidence level. Our pharmacists review the content; we never let an AI decide an interaction. See how to read the ratings and our editorial policy.
What about Bismuth Subsalicylate (OTC drug) and my other medications?
This page covers Bismuth Subsalicylate (OTC drug) against supplements and herbal ingredients. Checking Bismuth Subsalicylate (OTC drug) against your other prescription or OTC medications is a different tool — our drug interaction checker covers that side. Head to the drug–drug interaction checker, or read the full Bismuth Subsalicylate drug information.

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

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Where This Data Comes From — and Why You Can Trust It

🧪 Licensed clinical database

Every interaction verdict on this page comes from Natural Medicines Pro (TRC Healthcare / Therapeutic Research) — the same evidence-graded reference used by pharmacists and hospitals. We license this data directly; we do not scrape it, and no AI invents an interaction.

🧑‍⚕️ Pharmacist review

This page is curated and coded by , Clinical Pharmacist, with additional analysis by the HelloPharmacist Pharmacist Team. Editorial commentary is ours; the licensed interaction records are shown as sourced.

🔄 Kept current

Our interaction database refreshes on a weekly cycle, and this page re-checks the live database every time it’s rebuilt — what you see reflects the database as of September 25, 2026.

🔍 Full transparency

How every dataset on this site is sourced, licensed, and updated is documented publicly: our data sources · editorial policy · how we use AI.

Educational information, not medical advice. An interaction being on file does not mean it will happen to you — and absence of one is not proof of safety. Never start or stop a medication or supplement without talking to your pharmacist or doctor.