Does doxycycline contain wheat or gluten as an excipient?

We cross-check each doxycycline 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 11 product labels we checked, 9 are clean, 1 are confirmed gluten-free by the maker, and 1 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 doxycycline 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 doxycycline 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.

DailyMed checked live · reference data updated August 19, 2026 · 11 product labels screened

Is doxycycline gluten-free?

By Ned Walsch

Founder and maintainer of Gluten Screen

Updated August 20, 2026

Not clinically reviewed — verify with your pharmacist

Looks mostly clean — worth verifying with the maker. Mostly yes — but worth a quick call to the manufacturer for some generics. Of 11 product labels we checked, 9 are clean, 1 are confirmed gluten-free by the maker, and 1 contain an inactive ingredient (typically a source-ambiguous starch) whose botanical origin isn't fully disclosed. None contained confirmed gluten.

Drug context

About doxycycline

Doxycycline is a tetracycline-class antibiotic used for acne, Lyme disease, and respiratory infections, sold under brand names including Vibramycin, Oracea.

Why this matters

Different manufacturers, different ingredients

Generics of doxycycline 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 11 we checked

01

Mylan manufacturer-attested gluten-free

Plogsted list · Doxycycline (Mylan, Watson, West-Ward) · label dated 2017-04-28

Listed gluten-free in Plogsted Alpha List (2017-04-28)
View source label →
02

Strides Pharma Science Limited worth a call to confirm

US label (DailyMed) · DOXYCYCLINE HYCLATE TABLET [STRIDES PHARMA SCIENCE LIMITED] · label dated Jun 29, 2026

Worth a call to the maker: SODIUM STARCH GLYCOLATE TYPE A

Inactive ingredients FD&C YELLOW NO. 6 · FERRIC OXIDE RED · FERRIC OXIDE YELLOW · HYPROMELLOSE 2910 (5 MPA.S) · MAGNESIUM STEARATE · MICROCRYSTALLINE CELLULOSE · POLYETHYLENE GLYCOL 6000 · SILICON DIOXIDE · SODIUM STARCH GLYCOLATE TYPE A · TALC · TITANIUM DIOXIDE
View source label →
03

Avenacy Inc. nothing flagged on the label

US label (DailyMed) · DOXYCYCLINE INJECTION, POWDER, LYOPHILIZED, FOR SOLUTION [AVENACY INC.] · label dated Aug 10, 2026

Inactive ingredients ascorbic acid · mannitol
View source label →
04

Lupin Pharmaceuticals, Inc. nothing flagged on the label

US label (DailyMed) · DOXYCYCLINE INJECTION, POWDER, LYOPHILIZED, FOR SOLUTION [LUPIN PHARMACEUTICALS, INC.] · label dated Aug 04, 2026

Inactive ingredients ASCORBIC ACID · MANNITOL
View source label →
05

Wellhouse Pharma, LLC nothing flagged on the label

US label (DailyMed) · DOXYCYCLINE CAPSULE [WELLHOUSE PHARMA, LLC] · label dated Jul 27, 2026

Inactive ingredients D&C YELLOW NO. 10 · FD&C BLUE NO. 1 · FD&C BLUE NO. 2 · FD&C RED NO. 40 · FERRIC OXIDE RED · FERRIC OXIDE YELLOW · FERROSOFERRIC OXIDE · MAGNESIUM STEARATE · MICROCRYSTALLINE CELLULOSE · SILICON DIOXIDE · SODIUM STARCH GLYCOLATE TYPE A POTATO · TITANIUM DIOXIDE
View source label →
06

Actavis Pharma, Inc. nothing flagged on the label

US label (DailyMed) · DOXYCYCLINE HYCLATE TABLET, DELAYED RELEASE [ACTAVIS PHARMA, INC.] · label dated Jul 24, 2026

Inactive ingredients CROSPOVIDONE · D&C YELLOW NO. 10 ALUMINUM LAKE · HYPROMELLOSE 2910 (5 MPA.S) · HYPROMELLOSE PHTHALATE (24% PHTHALATE, 55 CST) · MAGNESIUM STEARATE · MANNITOL · MICROCRYSTALLINE CELLULOSE · POVIDONE · SILICIFIED MICROCRYSTALLINE CELLULOSE (125 .MICRO.M) · TALC · TRIETHYL CITRATE
View source label →
07

Golden State Medical Supply, Inc. nothing flagged on the label

US label (DailyMed) · DOXYCYCLINE CAPSULE [GOLDEN STATE MEDICAL SUPPLY, INC.] · label dated Jul 24, 2026

Inactive ingredients CELLULOSE, MICROCRYSTALLINE · D&C YELLOW NO. 10 · FD&C YELLOW NO. 6 · GELATIN · MAGNESIUM STEARATE · SILICON DIOXIDE · SODIUM STARCH GLYCOLATE TYPE A POTATO · TITANIUM DIOXIDE
View source label →
08

Cranbury Pharmaceuticals, LLC nothing flagged on the label

US label (DailyMed) · DOXYCYCLINE HYCLATE TABLET [CRANBURY PHARMACEUTICALS, LLC] · label dated Jul 20, 2026

Inactive ingredients CROSCARMELLOSE SODIUM · FERRIC OXIDE RED · FERRIC OXIDE YELLOW · HYPROMELLOSE 2910 (6 MPA.S) · MAGNESIUM STEARATE · MICROCRYSTALLINE CELLULOSE · POLYETHYLENE GLYCOL 400 · SILICON DIOXIDE · TITANIUM DIOXIDE · WATER
View source label →
09

Northwind Health Company, LLC nothing flagged on the label

US label (DailyMed) · DOXYCYCLINE HYCLATE TABLET, COATED [NORTHWIND HEALTH COMPANY, LLC] · label dated Jul 03, 2026

Inactive ingredients CROSCARMELLOSE SODIUM · DOCUSATE SODIUM · FD&C BLUE NO. 2 · FD&C YELLOW NO. 6 · HYPROMELLOSE, UNSPECIFIED · MAGNESIUM STEARATE · MICROCRYSTALLINE CELLULOSE · POLYETHYLENE GLYCOL, UNSPECIFIED · SILICON DIOXIDE · SODIUM BENZOATE · STARCH, CORN · TITANIUM DIOXIDE
View source label →
10

Chartwell RX, LLC nothing flagged on the label

US label (DailyMed) · DOXYCYCLINE HYCLATE TABLET, FILM COATED DOXYCYCLINE HYCLATE CAPSULE [CHARTWELL RX, LLC] · label dated Jul 01, 2026

Inactive ingredients ALCOHOL · CROSCARMELLOSE SODIUM · D&C YELLOW NO. 10 ALUMINUM LAKE · FD&C BLUE NO. 1 · FD&C BLUE NO. 1 ALUMINUM LAKE · FD&C BLUE NO. 2 · FD&C RED NO. 3 · FD&C RED NO. 40 ALUMINUM LAKE · FERRIC OXIDE YELLOW · FERROSOFERRIC OXIDE · GELATIN, UNSPECIFIED · MAGNESIUM STEARATE · MICROCRYSTALLINE CELLULOSE · POLYETHYLENE GLYCOL 8000 · POLYVINYL ALCOHOL, UNSPECIFIED · SHELLAC · SODIUM LAURYL SULFATE · TALC · TITANIUM DIOXIDE
View source label →
11

St. Mary's Medical Park Pharmacy nothing flagged on the label

US label (DailyMed) · DOXYCYCLINE HYCLATE TABLET [ST. MARY'S MEDICAL PARK PHARMACY] · label dated Jun 29, 2026

Inactive ingredients CROSCARMELLOSE SODIUM · FERRIC OXIDE RED · FERRIC OXIDE YELLOW · HYPROMELLOSE 2910 (6 MPA.S) · MAGNESIUM STEARATE · MICROCRYSTALLINE CELLULOSE · POLYETHYLENE GLYCOL 400 · SILICON DIOXIDE · TITANIUM DIOXIDE · WATER
View source label →

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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 →

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