Medication interaction hub

What Supplements Interact with Potassium Iodide (prescription drug)?

Potassium Iodide (prescription drug) brand name: Thyro-Block. Every interaction below applies to the brands too.

26 Interactions 1 Major 16 Moderate 9 Minor
Curated & coded by · Clinical Pharmacist · Updated September 29, 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 Potassium Iodide (prescription 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 Potassium Iodide (prescription 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.

Activated charcoal is the pairing I would want anyone on potassium iodide (Thyro-Block) to understand first. It carries the only major rating among the 26 supplements and herbs on file, because it binds medicines in the gut and can sharply cut how much of an oral dose is absorbed. The rest splits two ways: fibers and gels like glucomannan that blunt absorption of anything swallowed, and iodine-rich seaweeds such as sea moss that stack extra iodine on the drug and can swing the thyroid too high or too low. This is a list that warrants genuine caution.

Sixteen entries rate moderate and nine minor, so the danger sits mostly at the top. Spacing your dose well apart from any fiber product handles much of the absorption issue. The seaweed group is different; if you take one for its iodine, read that entry closely before continuing it with this prescription.

— , Clinical Pharmacist · July 18, 2026

Major 1 Moderate 16 Minor 9 No known interaction 1,426

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

Potassium Iodide (prescription drug): Top Interactions at a Glance

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

Showing the 12 highest-ranked of 26 interacting ingredients — plus 1,426 more checked with no known interaction. See the complete ranked list.

Start here

The Major Interactions to Know About

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

Major Likelihood Probable Activated Charcoal + Potassium Iodide (prescription 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 Potassium Iodide (prescription drug)

All 1,452 ingredients in our database, ranked by severity — 26 with a Potassium Iodide (prescription drug) interaction on file and 1,426 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 Potassium Iodide (prescription 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 Potassium Iodide (prescription 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 + Potassium Iodide (prescription drug) answer

Can you take Laminaria with Potassium Iodide (prescription drug)?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Due to its iodine content, laminaria might alter the effects of antithyroid drugs.

Full Laminaria + Potassium Iodide (prescription drug) answer

Can you take Sea Moss with Potassium Iodide (prescription drug)?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Due to its iodine content, sea moss might alter the effects of antithyroid drugs.

Full Sea Moss + Potassium Iodide (prescription drug) answer

Can you take Slippery Elm with Potassium Iodide (prescription 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 + Potassium Iodide (prescription drug) answer

Can you take Tragacanth with Potassium Iodide (prescription 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 + Potassium Iodide (prescription drug) answer

Can you take Thyroid Extract with Potassium Iodide (prescription 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 + Potassium Iodide (prescription drug) answer

Can you take Agar with Potassium Iodide (prescription 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 + Potassium Iodide (prescription drug) answer

Can you take Algin with Potassium Iodide (prescription 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 + Potassium Iodide (prescription drug) answer

Can you take Black Psyllium with Potassium Iodide (prescription 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 + Potassium Iodide (prescription drug) answer

Can you take Blond Psyllium with Potassium Iodide (prescription 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 + Potassium Iodide (prescription drug) answer

Can you take Carob with Potassium Iodide (prescription 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 + Potassium Iodide (prescription drug) answer

Can you take Karaya Gum with Potassium Iodide (prescription 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 + Potassium Iodide (prescription drug) answer

Can you take Marshmallow with Potassium Iodide (prescription 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 + Potassium Iodide (prescription drug) answer

Can you take Xanthan Gum with Potassium Iodide (prescription 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 + Potassium Iodide (prescription drug) answer

Can you take Activated Charcoal with Potassium Iodide (prescription 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 + Potassium Iodide (prescription drug) answer

Can you take Coffee Charcoal with Potassium Iodide (prescription 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 + Potassium Iodide (prescription drug) answer

Can you take European Mandrake with Potassium Iodide (prescription 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 + Potassium Iodide (prescription drug) answer

Can you take Glucomannan with Potassium Iodide (prescription 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 + Potassium Iodide (prescription drug) answer

Can you take Iodine with Potassium Iodide (prescription drug)?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Iodine might alter the effects of antithyroid drugs.

Full Iodine + Potassium Iodide (prescription drug) answer

Can you take Ascophyllum Nodosum with Potassium Iodide (prescription drug)?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Due to its iodine content, Ascophyllum nodosum might alter the effects of antithyroid drugs.

Full Ascophyllum Nodosum + Potassium Iodide (prescription 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) Potassium Iodide (prescription drug) is classified into the pharmacology categories it belongs to, (2) every supplement interaction documented against any of those categories is inherited by Potassium Iodide (prescription 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.

Potassium Iodide (prescription drug) sits in 2 interaction categories. 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 Potassium Iodide (prescription drug) through this category.

Antithyroid Drugs 9 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.

9 of the supplement ingredients on this page reach Potassium Iodide (prescription drug) through this category.

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Take a Supplement Product? Check the Whole Bottle Against Potassium Iodide (prescription 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 Potassium Iodide (prescription drug).

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Pharmacist Counseling Corner

Potassium Iodide (prescription drug) & Supplements: Common Questions

What supplements interact with Potassium Iodide (prescription drug)?
In our interaction database, 26 supplement and herbal ingredients have an interaction with Potassium Iodide (prescription drug) on file — 1 rated major, 16 moderate, and 9 minor. That number sounds scarier than it is: severity matters far more than the count, which is why the list on this page is ranked instead of alphabetical. Start at the top. The highest-ranked right now: Activated Charcoal, Coffee Charcoal, European Mandrake.
Which Potassium Iodide (prescription 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 Potassium Iodide (prescription drug)?
That depends entirely on which supplement. The honest answer for Potassium Iodide (prescription drug) is in the ranked list above — and if what you take is a combination product with a dozen ingredients, don't check them one by one: photograph the label with our scanner and we'll check the whole thing at once. Try the label scanner or the interaction checker.
Do brands like Thyro-Block have the same supplement interactions as Potassium Iodide (prescription drug)?
Yes — Thyro-Block all contain Potassium Iodide (prescription 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 Potassium Iodide (prescription drug) and my other medications?
This page covers Potassium Iodide (prescription drug) against supplements and herbal ingredients. Checking Potassium Iodide (prescription 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.

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

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Sourcing

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 29, 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.