Drug & supplement interaction

Corn Silk + Dextromethorphan

Dextromethorphan brand names: Hold, Benylin Adult, Benylin Pediatric, Theraflu Thin Strips Long Acting Cough, Neo Citran Thin Strips Cough.

No Known Interaction

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS · Updated July 2026 · Pair last verified Oct 4, 2026

The bottom line No known interaction

We found no known interaction between Corn Silk and Dextromethorphan 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

Corn Silk and Dextromethorphan

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 Dextromethorphan and Corn Silk 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.

Corn Silk safety at a glance

Corn Silk overall Use caution Generally well tolerated for short-term use, but human safety data are limited.

Pregnancy Avoid Not enough reliable safety data, so it is best avoided during pregnancy.

Breastfeeding Possibly Safe When consumed in food amounts. Insufficient reliable information available when used as medicine; avoid using. 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 Dextromethorphan and Corn Silk? Ask Dr. Brian Staiger, PharmD, BCPS directly ›

How we checked

Why No Interaction Is Listed for Dextromethorphan

Interactions in our licensed database are recorded against drug classes, not just single drug names. Dextromethorphan is filed under 6 classifications — including serotonergic drugs, serotonergic drugs, cytochrome p450 2d6 (cyp2d6) substrates. Corn Silk has documented interactions with 5 drug classes — the most serious being antidiabetes drugs (moderate), antihypertensive drugs (moderate) and corticosteroids (moderate) — and none of Dextromethorphan’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

Corn Silk Does Interact With Other Medications

Corn Silk has 290 moderate known drug interactions in our database — Dextromethorphan isn’t one of them. If you take anything else, check it against the full list below.

Moderate 290 No known interaction 2,540 (incl. Dextromethorphan)

Taking anything else?

Check Another of Your Medications Against Corn Silk

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

What to actually watch for

What Corn Silk Itself Has Been Linked To

This is not an interaction — nothing below involves Dextromethorphan. It is the side-effect record for Corn Silk on its own, from the licensed Natural Medicines monograph. If something new turns up after you add Corn Silk, this list is the first place to look. 3 entries are worth acting on rather than waiting out — marked below.

Low sodium Worth acting on Additional detail

“Orally, adverse effects to corn silk seem to be rare; however, a thorough safety evaluation has not been conducted.

Most Common Adverse Effects:

Orally: Hypokalemia, hyponatremia.”

Corn Silk · Natural Medicines adverse-effect record, reported in hypokalemia.
Low potassium Worth acting on Additional detail
“Orally, corn silk has been reported to cause hypokalemia with prolonged use (4).”

Corn Silk · Natural Medicines adverse-effect record, reported in hypokalemia.
1 source cited

4. Newall CA, Anderson LA, Philpson JD. Herbal Medicine: A Guide for Healthcare Professionals. London, UK: The Pharmaceutical Press, 1996.
Hives Worth acting on Additional detail
“Topically, corn silk can cause dermatitis and urticaria (4).”

Corn Silk · Natural Medicines adverse-effect record, reported in dermatitis.
1 source cited

4. Newall CA, Anderson LA, Philpson JD. Herbal Medicine: A Guide for Healthcare Professionals. London, UK: The Pharmaceutical Press, 1996.
A skin rash Additional detail

Recorded for Corn Silk in the same Natural Medicines adverse-effect record shown under Hives above.

Everything above comes from the Natural Medicines adverse-effect record for Corn Silk — expand a row for the licensed statement it rests on. We haven’t matched Dextromethorphan 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 Dextromethorphan.

Special populations

Corn Silk in Pregnancy & Breastfeeding

Lactation Possibly Safe

When consumed in food amounts. Insufficient reliable information available when used as medicine; avoid using.

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

From our Q&A

Questions About Corn Silk or Dextromethorphan

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Corn Silk or Dextromethorphan, not necessarily both, but if one is close to what you were about to ask it will usually go further than a database entry can:

Not quite your question? Ask our pharmacists directly — it is free, there is no account required, and answers usually come back within 24 hours.

Everything else you take

See Every Supplement That Interacts With Dextromethorphan

This page covers Corn Silk only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Dextromethorphan page lists 171 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Grapefruit (major), Lithium (major), St. John's Wort (major) and 1,3-dmaa (moderate).

By severity: 4 major · 125 moderate · 42 minor.

From our pharmacist’s overview on the Dextromethorphan page

“A glass of grapefruit juice can push dextromethorphan (Benylin, Hold, and other cough medicines) to higher levels than intended, one of four major-rated entries among the 171 supplements and herbs on file, and the list as a whole warrants real care. Most interactions trace back to the liver enzymes (CYP3A4 and CYP2D6) that clear dextro…”

Reviewed by 2 · Jul 18, 2026

Open the Dextromethorphan interaction page

One more smart check

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

We hold 58 real supplement products containing Corn Silk, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Corn Silk. Even though Corn Silk itself has no known interaction with Dextromethorphan, 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 Corn Silk and Dextromethorphan 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 Corn Silk

Top half

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

29 days ago today

Medication Dextromethorphan

Top 25%

#330 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 Corn Silk reference on this page ↓
Freshness: we automatically re-check this combination every week — this pair was last verified October 4, 2026. The Corn Silk and Dextromethorphan 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 Dr. Brian Staiger, PharmD, BCPS.

Supplement

About Corn Silk

What is Corn Silk?

Urinary tract and bladder problems
Mild fluid retention (diuretic)
Kidney and prostate concerns
Bedwetting in children
Soothing urinary irritation

Corn silk is a traditional herbal remedy taken as a tea or extract, mostly for urinary and mild fluid-related complaints. High-quality human evidence for these uses is limited, so it should not replace proven treatments. It is generally considered low-risk for short-term use in healthy adults, but talk with your pharmacist or doctor before trying it.

Zea mays · Poaceae · Stigmas and styles (the silky strands) of the corn ear · Tea, dried herb, liquid extract/tincture, capsules

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

Corn Silk: dosing

There is no official, standardized dose for corn silk. It has traditionally been taken as a tea made by steeping dried corn silk in hot water, or as a liquid extract or capsule.Because product strengths vary widely, the best advice is to follow the directions on the product label and not exceed them.

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

Read the full Corn Silk monograph & all interactions

Medication

About Dextromethorphan

What Is Dextromethorphan Used For?

Brand names: Hold, Benylin Adult, Benylin Pediatric, Theraflu Thin Strips Long Acting Cough, Neo Citran Thin Strips Cough

Dextromethorphan temporarily relieves cough due to minor throat and bronchial irritation. This can happen with the common cold or from inhaled irritants.

Some products are also labeled to help you get to sleep by reducing the urge to cough. Some labels also list helping reduce how intense the coughing is. Honey Works syrup, Premier Value Tussin Cough and CVS Long Acting Cough liquids are also labeled to help loosen phlegm (mucus) and thin bronchial secretions so they drain from the bronchial tubes.

Most-Reported Side Effects for Dextromethorphan

From FAERS, the FDA’s public side-effect reporting system (58,576 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Dizziness 3,563 reports

Diarrhea 3,371 reports

Nausea 3,324 reports

Dyspnea 3,103 reports

Fatigue 3,078 reports

See full Dextromethorphan drug information

Keep checking

Other Drugs & Corn Silk

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

0Major

290Moderate

0Minor

2,539No known interaction

290 Moderate 2,539 No interaction

Moderate

290 interactions

Showing 60 of 290 moderate interactions — see all 290 on the Corn Silk page.

No interaction 2,539 drugs checked — show the list

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

Showing the 60 most looked-up of 2,539 medications checked with no known interaction — see the full Corn Silk list.

See the full Corn Silk interactions page

See every supplement checked against Dextromethorphan, ranked by severity

Evidence & sources

Corn Silk References

The 4 references that drive our Corn Silk 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.

Newall CA, Anderson LA, Philpson JD. Herbal Medicine: A Guide for Healthcare Professionals. London, UK: The Pharmaceutical Press, 1996.
Brinker F. Herb Contraindications and Drug Interactions. 2nd ed. Sandy, OR: Eclectic Medical Publications, 1998.
George GO, Idu FK. Corn silk aqueous extracts and intraocular pressure of systemic and non-systemic hypertensive subjects. Clin Exp Optom. 2015 Mar;98(2):138-49. PubMed
Sheng L, Chen Q, Di L, Li N. Evaluation of anti-diabetic potential of corn silk in high-fat diet/streptozotocin- induced type 2 diabetes mice model. Endocr Metab Immune Disord Drug Targets. 2020. 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 Corn Silk and Dextromethorphan Together: Common Questions

Is it safe to take Corn Silk with Dextromethorphan?

We do not list a known interaction between Corn Silk and Dextromethorphan. 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 Corn Silk and Dextromethorphan combination checked?

Interactions in our licensed database are recorded against drug classes. Dextromethorphan is filed under 6 classifications, and Corn Silk has documented interactions with 5 drug classes — none of Dextromethorphan'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 Corn Silk interact with any other medications?

Yes. Corn Silk has 290 documented drug interactions in our database — Dextromethorphan 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 Dextromethorphan interact with any supplements?

Yes. Dextromethorphan has documented interactions with 171 supplements in our database — Corn Silk is not one of them. The Dextromethorphan 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

Corn Silk monograph Uses, safety profile, and every drug interaction in one place Dextromethorphan drug information The full plain-English guide to this medication Dextromethorphan supplement interactions Every supplement checked against Dextromethorphan, 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 4 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Dextromethorphan and Corn Silk?

Our pharmacists answer your medication & supplement questions — free.

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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.