Drug & supplement interaction

Horseradish + Chlorpheniramine, Pseudoephedrine

Chlorpheniramine, Pseudoephedrine brand names: Codimal LA Half, Kronofed A JR, Codimal LA, Decongestant Sr, Children's Deconamine, and others.

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 Horseradish and Chlorpheniramine, 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

Horseradish and Chlorpheniramine, 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 Chlorpheniramine, Pseudoephedrine and Horseradish 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.

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.

Horseradish safety at a glance

Horseradish overall Use caution Food amounts are generally safe, but concentrated supplements may irritate the digestive tract and mucous membranes.
Pregnancy Avoid Avoid medicinal amounts during pregnancy because safety has not been established.
Breastfeeding Likely Safe When the root is used orally in amounts commonly found in foods. Horseradish has Generally Recognized as Safe (GRAS) status in the US. Read the full breastfeeding detail

Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center) — the full detail is in the Special populations card below. Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Chlorpheniramine, Pseudoephedrine and Horseradish? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Chlorpheniramine, Pseudoephedrine

Interactions in our licensed database are recorded against drug classes, not just single drug names. Chlorpheniramine, Pseudoephedrine is filed under 11 classifications — including cytochrome p450 2d6 (cyp2d6) inhibitors, alpha-adrenergic agonists, stimulant drugs. Horseradish has documented interactions with 1 drug class — the most serious being thyroid hormone (moderate) — and none of Chlorpheniramine, Pseudoephedrine’s classifications are among them.

Classification data comes from our licensed Natural Medicines dataset. A medication can belong to classes beyond those recorded there, so this describes how the check was run — it is not a safety guarantee.

Keep it in perspective

Horseradish Does Interact With Other Medications

Horseradish has 16 moderate known drug interactions in our database — Chlorpheniramine, Pseudoephedrine isn’t one of them. If you take anything else, check it against the full list below.

Moderate 16 No known interaction 2,814 (incl. Chlorpheniramine, Pseudoephedrine)
Taking anything else?

Check Another of Your Medications Against Horseradish

Covers the 2,830 medications we’ve checked against Horseradish. Pick one to open its full report.

What to actually watch for

What Horseradish Itself Has Been Linked To

This is not an interaction — nothing below involves Chlorpheniramine, Pseudoephedrine. It is the side-effect record for Horseradish on its own, from the licensed Natural Medicines monograph. If something new turns up after you add Horseradish, this list is the first place to look. 2 entries are worth acting on rather than waiting out — marked below.

  • Fainting Worth acting on Additional detail

    “Orally, consuming large amounts of horseradish can cause vasovagal syncope in rare cases. At least two cases of vasovagal syncope associated with horseradish consumption have been reported. In one case, a 56-year-old male experienced a sharp burning sensation in his stomach followed by tachycardia, weakness, and excessive perspiration after consuming an oyster topped with an olive-sized dollop of fresh horseradish.”

    Horseradish · Natural Medicines adverse-effect record, reported in irregular heartbeat.

    1 source cited
    1. 111724. Lehmann CU, Puckett AL, Betz BO. 56-year-old man - increased heart rate - weakness - intense sweating - horseradish consumption - Dx?. J Fam Pract 2022;71(7):317-321. PubMed
  • An allergic reaction Worth acting on Additional detail

    Recorded for Horseradish in the same Natural Medicines adverse-effect record shown under Fainting above.

  • Sweating / A fast or pounding heartbeat Additional detail

    Recorded for Horseradish in the same Natural Medicines adverse-effect record shown under Fainting above.

  • Stomach upset / Diarrhea / Vomiting Additional detail

    “Orally, consuming large amounts of horseradish can cause gastrointestinal upset, bloody vomiting and diarrhea (2,6), and irritation of mucous membranes (2,4).”

    Horseradish · Natural Medicines adverse-effect record, reported in diarrhea.

    3 sources cited
    1. 2. Blumenthal M, ed. The Complete German Commission E Monographs: Therapeutic Guide to Herbal Medicines. Trans. S. Klein. Boston, MA: American Botanical Council, 1998.
    2. 6. The Review of Natural Products by Facts and Comparisons. St. Louis, MO: Wolters Kluwer Co., 1999.
    3. 4. Newall CA, Anderson LA, Philpson JD. Herbal Medicine: A Guide for Healthcare Professionals. London, UK: The Pharmaceutical Press, 1996.

Everything above comes from the Natural Medicines adverse-effect record for Horseradish — expand a row for the licensed statement it rests on. We haven’t matched Chlorpheniramine, Pseudoephedrine to its FDA label in our system yet, so we can’t compare its own side-effect list here — the leaflet that comes with your prescription is the authoritative list for Chlorpheniramine, Pseudoephedrine.

Special populations

Horseradish in Pregnancy & Breastfeeding

Lactation Likely Safe

When the root is used orally in amounts commonly found in foods. Horseradish has Generally Recognized as Safe (GRAS) status in the US.

Lactation Likely Unsafe

When used orally in large amounts. The mustard oils produced by glucosinolates from horseradish are considered toxins that can be excreted through breast milk.

DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.© 2026 Therapeutic Research Center

Everything else you take

See Every Supplement That Interacts With Chlorpheniramine, Pseudoephedrine

This page covers Horseradish only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Chlorpheniramine, Pseudoephedrine page lists 230 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Ephedra (major), Grapefruit (major), Henbane (major) and Lithium (major).

By severity: 10 major · 176 moderate · 44 minor.

From our pharmacist’s overview on the Chlorpheniramine, Pseudoephedrine page

“Someone taking a cold-and-allergy combination like chlorpheniramine and pseudoephedrine (Deconamine, Codimal LA) is often also drinking coffee, having grapefruit at breakfast, or trying an herbal energy product, and those everyday habits are exactly where this list bites. I would treat it with real care; ten of the 230 ingredients on f…”

Reviewed by 2 · Jul 18, 2026

Open the Chlorpheniramine, Pseudoephedrine interaction page

One more smart check

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

We hold 245 real supplement products containing Horseradish, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Horseradish. Even though Horseradish itself has no known interaction with Chlorpheniramine, 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 Horseradish and Chlorpheniramine, 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 Horseradish
Steady interest

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

29 days ago today
Medication Chlorpheniramine, Pseudoephedrine
Top 10%

#189 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 Horseradish reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Horseradish and Chlorpheniramine, Pseudoephedrine records this page draws on were last updated July 11, 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 Horseradish

What is Horseradish?

  • Sinus and respiratory congestion
  • Urinary tract infections
  • Digestive support
  • Antimicrobial
  • Culinary flavoring

Horseradish is a pungent root used as a food and folk remedy, most often for sinus congestion and urinary tract complaints. Human evidence is limited, and while culinary amounts are generally well tolerated, concentrated supplements can irritate the stomach and should be used cautiously. Talk with your pharmacist or doctor before using horseradish as a medicine.

Armoracia rusticana · Brassicaceae · Root (fresh or dried) · Fresh grated root, dried root powder, prepared condiment (sauce), capsules, tinctures

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

Horseradish: dosing

There is no well-established standardized medicinal dose for horseradish. Amounts used in research and traditional practice vary widely depending on the form (fresh root, dried powder, or extract).If you use a commercial supplement, follow the directions on the product label and do not exceed the recommended amount. Avoid taking large or concentrated amounts in hopes of stronger effects, since this mainly increases the risk of irritation and side effects.

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

Read the full Horseradish monograph & all interactions
Keep checking

Other Drugs & Horseradish

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

0Major
16Moderate
0Minor
2,813No known interaction
16 Moderate 2,813 No interaction
Moderate

16 interactions

No interaction 2,813 drugs checked — show the list

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

Showing the 60 most looked-up of 2,813 medications checked with no known interaction — see the full Horseradish list.

See the full Horseradish interactions page
See every supplement checked against Chlorpheniramine, Pseudoephedrine, ranked by severity
Evidence & sources

Horseradish References

The 6 references that drive our Horseradish 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. Blumenthal M, ed. The Complete German Commission E Monographs: Therapeutic Guide to Herbal Medicines. Trans. S. Klein. Boston, MA: American Botanical Council, 1998.
  2. Newall CA, Anderson LA, Philpson JD. Herbal Medicine: A Guide for Healthcare Professionals. London, UK: The Pharmaceutical Press, 1996.
  3. The Review of Natural Products by Facts and Comparisons. St. Louis, MO: Wolters Kluwer Co., 1999.
  4. Electronic Code of Federal Regulations. Title 21. Part 182 -- Substances Generally Recognized As Safe. Available at: https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/CFRSearch.cfm?CFRPart=182
  5. Panter, K. E. and James, L. F. Natural plant toxicants in milk: a review. J Anim Sci 1990;68(3):892-904. PubMed
  6. Lehmann CU, Puckett AL, Betz BO. 56-year-old man - increased heart rate - weakness - intense sweating - horseradish consumption - Dx?. J Fam Pract 2022;71(7):317-321. 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 Horseradish and Chlorpheniramine, Pseudoephedrine Together: Common Questions

Is it safe to take Horseradish with Chlorpheniramine, Pseudoephedrine?
We do not list a known interaction between Horseradish and Chlorpheniramine, 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.
How was the Horseradish and Chlorpheniramine, Pseudoephedrine combination checked?
Interactions in our licensed database are recorded against drug classes. Chlorpheniramine, Pseudoephedrine is filed under 11 classifications, and Horseradish has documented interactions with 1 drug class — none of Chlorpheniramine, Pseudoephedrine's classifications are among them. A medication can belong to classes beyond those recorded in our dataset, so this describes how the check was run rather than guaranteeing safety.
Does Horseradish interact with any other medications?
Yes. Horseradish has 16 documented drug interactions in our database — Chlorpheniramine, Pseudoephedrine is simply not one of them. If you take anything else, it is worth checking each one; they are all listed on this page.
Does Chlorpheniramine, Pseudoephedrine interact with any supplements?
Yes. Chlorpheniramine, Pseudoephedrine has documented interactions with 230 supplements in our database — Horseradish is not one of them. The Chlorpheniramine, 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

Horseradish monograph Uses, safety profile, and every drug interaction in one place Chlorpheniramine, Pseudoephedrine supplement interactions Every supplement checked against Chlorpheniramine, 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 6 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Chlorpheniramine, Pseudoephedrine and Horseradish?

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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.