Herb & supplement monograph

Corn Silk Drug Interactions, Uses, Effectiveness, Safety & More

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS ·Updated July 2026

What is this page for?

First and foremost: how Corn Silk interacts with medications. The heart of this page is the interaction list — every drug Corn Silk is known to interact with, and how serious each one is.

But these pages have grown well beyond that into a full monograph — what Corn Silk is, what people use it for and how strong the evidence is, its safety and side effects, and answers to the questions we’re asked most — written and reviewed by the clinical staff at HelloPharmacist. It’s educational information from our licensed clinical databases, not medical advice, and we don’t sell or endorse products. Our editorial policy

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On this page

Corn Silk Drug Interactions: The Bottom Line

From the HelloPharmacist Editorial Team · Updated July 2026

Based on the available evidence, the overall risk of a serious Corn Silk drug interaction is moderate at worst, and for most people problems are unlikely. Every listed interaction is rated moderate, none major, and most rest on early or theoretical research rather than proven harm in people.

Interactions deserving the most attention

The clearest concern is warfarin, because corn silk contains vitamin K, which can work against this blood thinner if intake changes suddenly, so steady use matters for stable anticoagulation. Human studies also show corn silk increases urine output, flushes out sodium and potassium, and lowers blood pressure, so it deserves care alongside diuretics and blood pressure medications, where added effects could shift electrolytes or drop pressure too far. That same potassium loss could add to corticosteroids, and animal research hints corn silk may lower blood sugar alongside diabetes medicines.

What the rest of the list means

A long interaction list does not mean each combination is harmful. Many entries reflect the same few effects, such as fluid loss or lower blood sugar, applied across whole categories of medicines. Several of these predicted effects come from animal or lab research and have not been shown to cause meaningful problems in people.

Check your medications against Corn Silk

Based on HelloPharmacist’s Corn Silk interaction data and reviewed under our editorial standards.

Interaction report

Drugs that interact with Corn Silk

290 medications have a known interaction with Corn Silk, graded by severity. Select any drug for the full evidence-based detail.

Don’t want to scroll the list? Just ask.

Tell us the medications you take and we’ll check each one against Corn Silk using our pharmacist-reviewed interaction data.

AI summaries are generated from our Corn Silk interaction data for education only — always confirm with your pharmacist. How we use AI

2,830 drugs

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 drug listed above links to the full report for that exact Corn Silk combination — clinical detail, likelihood, evidence level, and citations.
Content is reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

The big picture

The kinds of drugs Corn Silk affects

Every type of medication (drug category) Corn Silk is known to interact with. Open any category for the detail — or search your exact drug in the checker above.

All 5 drug categories Corn Silk interacts with

Antidiabetes DrugsAntihypertensive DrugsCorticosteroidsDiuretic DrugsWarfarin (coumadin)

Antidiabetes Drugs

Theoretically, taking corn silk with antidiabetes drugs might increase the risk of hypoglycemia.
Animal research in diabetic mice shows that taking corn silk extract lowers fasting blood glucose levels.

Likelihood Possible Evidence D

Antihypertensive Drugs

Taking corn silk extract with antihypertensive drugs might increase the risk of hypotension.
Clinical research in both hypertensive and normotensive adults shows that taking corn silk extract lowers systolic and diastolic blood pressure.

Likelihood Possible Evidence D

Corticosteroids

Taking corn silk with corticosteroids might increase the risk of hypokalemia.
Clinical research shows that taking corn silk extract increases the urinary excretion of potassium.

Likelihood Possible Evidence D

Diuretic Drugs

Taking corn silk with diuretic drugs might increase the risk of adverse effects such as hyponatremia and hypokalemia.
Clinical research shows that taking corn silk extract increases urine volume and promotes the urinary excretion of sodium and potassium. Some patients may require electrolyte supplementation.

Likelihood Possible Evidence D

Warfarin (Coumadin)

Theoretically, suddenly stopping, starting, or changing corn silk treatment may alter the effects of warfarin.
Corn silk contains vitamin K. Individuals taking warfarin should consume a consistent daily amount of corn silk to maintain consistent anticoagulation.

Likelihood Likely Evidence D

Monograph

Corn Silk: Uses, Safety & Side Effects

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS · Reviewed July 2026 ·

The bottom line

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.

Scientific name: Zea mays
Family: Poaceae
Part used: Stigmas and styles (the silky strands) of the corn ear
Common forms: Tea, dried herb, liquid extract/tincture, capsules

People commonly use it for

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

Popular and traditional uses — not proof it works. See “Uses & effectiveness” below for the evidence.

Safety at a glance

OverallUse caution

Generally well tolerated for short-term use, but human safety data are limited.

PregnancyBest avoided

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

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

Jump to a section

Overview

Corn silk is the bundle of thin, hair-like strands found just inside the husk of an ear of corn (Zea mays). These soft threads are actually the stigmas and styles of the corn plant, the parts that catch pollen so the corn can produce kernels.

Corn is grown all over the world, and the silk is collected and dried for use in teas and herbal preparations. It has a long history in traditional medicine systems, including Chinese and Native American practices.

Today people most often use corn silk as a tea or extract for urinary and bladder complaints, mild fluid retention, and prostate or kidney concerns. It is widely available as a dried herb, capsule, or liquid extract.

How it works

Corn silk contains a mix of natural compounds, including flavonoids, plant sterols (such as sitosterol and stigmasterol), tannins, saponins, vitamins, minerals, and small amounts of volatile oils.

The flavonoids and other antioxidants are thought to help calm inflammation and reduce damage from unstable molecules called free radicals. Its possible diuretic effect may come from compounds that encourage the kidneys to release more water and salts.

It's worth stressing that these proposed mechanisms are mostly based on test-tube and animal research. We do not fully understand how, or how well, corn silk works in the human body.

Effectiveness

Does Corn Silk work?

Here’s what the research actually shows for each use — graded by Natural Medicines and reviewed by Dr. Brian Staiger, PharmD.

Evidence overview · 14 uses evaluated

14 Insufficient evidence

How to read these evidence grades

Natural Medicines’ 7-point scale. We show each rating’s label word-for-word.

1EffectiveStrong, consistent evidence it works.

2Likely EffectiveGood evidence, though not yet conclusive.

3Possibly EffectiveSome evidence suggests a benefit.

4Possibly IneffectiveSome evidence it may not help.

5Likely IneffectiveFairly strong evidence it doesn’t help.

6IneffectiveStrong evidence it doesn’t work.

7Insufficient Reliable Evidence to RateToo little research to say either way.

For Corn Silk, current evidence isn’t strong enough to rate any specific use. The conditions it has been studied for are listed below.

Also studied for 14 conditions — evidence insufficient to rate

Insufficient Reliable Evidence To Rate Angina