Does warfarin contain wheat or gluten as an excipient?

We cross-check each warfarin product label against four data sources: DailyMed (FDA Structured Product Labels), the European Medicines Agency centrally-authorised medicines database, the Plogsted curated gluten-free drug list, and the 2024 Mangione et al. pediatric pharmacy NDC analysis. Inactive ingredients are scanned against a 146-entry red-flag dictionary covering wheat, barley, rye, malt, source-ambiguous starches, and FDA gluten-free attestation phrases. Mostly yes — but worth a quick call to the manufacturer for some generics. Of 16 product labels we checked, 8 are clean, 0 are confirmed gluten-free by the maker, and 8 contain an inactive ingredient (typically a source-ambiguous starch) whose botanical origin isn't fully disclosed. None contained confirmed gluten.

Can different manufacturers' generic versions of warfarin have different gluten status?

Yes. Generics in the United States must use the same active ingredient as the brand, but they are not required to use the same inactive ingredients. Two generics of warfarin from different manufacturers can use entirely different starch sources, binders, and fillers. A pharmacy may also switch which manufacturer it dispenses between fills without notifying you. Each manufacturer-specific entry below corresponds to a separately-filed product label.

Last verified May 17, 2026 · 16 product labels screened

Is warfarin gluten-free?

Looks mostly clean — worth verifying with the maker. Mostly yes — but worth a quick call to the manufacturer for some generics. Of 16 product labels we checked, 8 are clean, 0 are confirmed gluten-free by the maker, and 8 contain an inactive ingredient (typically a source-ambiguous starch) whose botanical origin isn't fully disclosed. None contained confirmed gluten.

Drug context

About warfarin

Warfarin is a vitamin K antagonist anticoagulant used to prevent and treat blood clots, sold under brand names including Coumadin, Jantoven.

Why this matters

Different manufacturers, different ingredients

Generics of warfarin use the same active ingredient, but they aren't required to use the same inactive ingredients. Your pharmacy may switch which manufacturer they dispense between fills, sometimes without telling you. The list below shows each manufacturer's product label as a separate entry, because that's the granularity that actually matters when you're celiac.

The labels

The 16 we checked

01

Amneal worth a call to confirm

Plogsted list · Warfarin all strengths [Amneal] · label dated 2019-04-23
View source label →
02

Barr worth a call to confirm

Plogsted list · Warfarin all strengths [Barr] · label dated 2019-04-23
View source label →
03

Cadilla worth a call to confirm

Plogsted list · Warfarin all strengths [Cadilla] · label dated 2019-04-23
View source label →
04

Camber worth a call to confirm

Plogsted list · Warfarin all strengths [Camber] · label dated 2019-04-23
View source label →
05

Genpharm worth a call to confirm

Plogsted list · Warfarin all strengths [Genpharm] · label dated 2019-04-23
View source label →
06

New Horizons worth a call to confirm

Plogsted list · Warfarin all strengths [New Horizons] · label dated 2019-04-23
View source label →
07

Taro worth a call to confirm

Plogsted list · Warfarin all strengths [Taro] · label dated 2019-04-23
View source label →
08

Zydus worth a call to confirm

Plogsted list · Warfarin all strengths [Zydus] · label dated 2019-04-23
View source label →
09

Northwind Health Company, LLC nothing flagged on the label

US label (DailyMed) · WARFARIN SODIUM TABLET [NORTHWIND HEALTH COMPANY, LLC] · label dated Mar 04, 2026

Inactive ingredients CROSCARMELLOSE SODIUM · FD&C BLUE NO. 2--ALUMINUM LAKE · FD&C RED NO. 40 · LACTOSE MONOHYDRATE · MAGNESIUM STEARATE · MICROCRYSTALLINE CELLULOSE · SILICON DIOXIDE
View source label →
10

Northwind Health Company, LLC nothing flagged on the label

US label (DailyMed) · WARFARIN SODIUM TABLET [NORTHWIND HEALTH COMPANY, LLC] · label dated Feb 26, 2026

Inactive ingredients CROSCARMELLOSE SODIUM · FD&C RED NO. 40 · LACTOSE MONOHYDRATE · MAGNESIUM STEARATE · MICROCRYSTALLINE CELLULOSE · SILICON DIOXIDE
View source label →
11

Northwind Health Company, LLC nothing flagged on the label

US label (DailyMed) · WARFARIN SODIUM TABLET [NORTHWIND HEALTH COMPANY, LLC] · label dated Feb 26, 2026

Inactive ingredients CROSCARMELLOSE SODIUM · D&C YELLOW NO. 10 ALUMINUM LAKE · FD&C RED NO. 40 · FD&C YELLOW NO. 6 · LACTOSE MONOHYDRATE · MAGNESIUM STEARATE · MICROCRYSTALLINE CELLULOSE · SILICON DIOXIDE
View source label →
12

Aphena Pharma Solutions - Tennessee, LLC nothing flagged on the label

US label (DailyMed) · WARFARIN SODIUM (WARFARIN) TABLET [APHENA PHARMA SOLUTIONS - TENNESSEE, LLC] · label dated Jan 26, 2026

Inactive ingredients D&C RED NO. 30 · D&C YELLOW NO. 10 · FD&C BLUE NO. 2 · FD&C RED NO. 40 · FD&C YELLOW NO. 6 · HYDROXYPROPYL CELLULOSE (TYPE E) · LACTOSE MONOHYDRATE · MAGNESIUM STEARATE · STARCH, CORN
View source label →
13

REMEDYREPACK INC. nothing flagged on the label

US label (DailyMed) · WARFARIN SODIUM (WARFARIN) TABLET [REMEDYREPACK INC.] · label dated May 01, 2026

Inactive ingredients FD&C BLUE NO. 2 · FD&C RED NO. 40 · FD&C YELLOW NO. 6 · HYDROXYPROPYL CELLULOSE (70000 WAMW) · LACTOSE MONOHYDRATE · MAGNESIUM STEARATE · STARCH, CORN
View source label →
14

Preferred Pharmaceuticals, Inc. nothing flagged on the label

US label (DailyMed) · WARFARIN SODIUM TABLET [PREFERRED PHARMACEUTICALS, INC.] · label dated Nov 17, 2025

Inactive ingredients FD&C BLUE NO. 2 · FD&C RED NO. 40 · HYDROXYPROPYL CELLULOSE (1600000 WAMW) · LACTOSE MONOHYDRATE · MAGNESIUM STEARATE · STARCH, CORN
View source label →
15

Cardinal Health 107, LLC nothing flagged on the label

US label (DailyMed) · WARFARIN SODIUM TABLET [CARDINAL HEALTH 107, LLC] · label dated Nov 17, 2025

Inactive ingredients ANHYDROUS LACTOSE · D&C RED NO. 6 BARIUM LAKE · D&C YELLOW NO. 10 ALUMINUM LAKE · FD&C BLUE NO. 2 ALUMINUM LAKE · FD&C RED NO. 40 ALUMINUM LAKE · MAGNESIUM STEARATE · STARCH, CORN
View source label →
16

Bryant Ranch Prepack nothing flagged on the label

US label (DailyMed) · WARFARIN SODIUM TABLET [BRYANT RANCH PREPACK] · label dated Aug 27, 2025

Inactive ingredients CROSCARMELLOSE SODIUM · LACTOSE MONOHYDRATE · MAGNESIUM STEARATE · MICROCRYSTALLINE CELLULOSE · SILICON DIOXIDE
View source label →

Try it live

Or screen warfarin right now

DailyMed updates daily and we have ~76 drugs in our static landing pages — for everything else, the live search is faster.

Screen warfarin live →

Background

What “gluten in a medication” actually means

Gluten enters drugs through their excipients — the inactive ingredients used to bind, coat, fill, or stabilize the dose. The main concern is wheat starch as a filler. Source-ambiguous starches (plain “starch”, pregelatinized starch, sodium starch glycolate, modified starch) get flagged for verification because their botanical origin isn't always disclosed on the label.

The 2024 Mangione et al. pediatric NDC analysis (689 NDCs across the top 100 pediatric medications) found 1.5% contained gluten outright; another 25.7% couldn't be confirmed either way. Liquid and oral-suspension formulations carry disproportionate risk because wheat starch is a common thickener. Full methodology →

Keep checking

Other drugs people look up

Important. This page is informational. Drug labels can change without notice; a manufacturer attestation is point-in-time, not a warranty. If you have celiac disease and your pharmacy switches manufacturers, re-screen the new label before taking the dispensed product. For a definitive answer, call the manufacturer's medical-information line with the NDC code from your prescription bottle.