Allegra contains no wheat-derived inactive ingredients per Sanofi, but it is not formally labeled gluten-free and OTC drugs are not covered by the FDA’s food gluten-free rule.
It depends on your sensitivity. Allegra’s active ingredient (fexofenadine HCl) is gluten-free by chemistry, and Sanofi’s published inactive ingredients contain no wheat-derived components — the pregelatinized starch is corn-derived. The FDA reports no oral drug products marketed in the US intentionally contain wheat gluten. For most celiacs Allegra is considered safe. For severely sensitive celiacs, the lack of formal gluten-free labeling and the existence of Gluten Free Watchdog testing warrant pharmacist verification.
Allegra (fexofenadine) is one of the most common celiac antihistamine questions, and the answer is similar to most OTC drugs: no gluten ingredients are intentionally added, but the product isn’t formally labeled gluten-free. For most celiacs that means Allegra is a low-risk choice. For severely sensitive consumers, the absence of formal labeling is a real consideration.
What’s in Allegra
Allegra Allergy 180 mg Tablets contain fexofenadine HCl as the active ingredient. Per the DailyMed NIH professional label, the inactive ingredients are: croscarmellose sodium, magnesium stearate, microcrystalline cellulose, povidone, pregelatinized starch (corn), colloidal silicon dioxide, polyethylene glycol, titanium dioxide, hypromellose, and iron oxide.
The pregelatinized starch — a common tablet binder — is explicitly corn-derived per Sanofi’s published label. If it were wheat-derived, FDA labeling rules would require it to appear as “wheat starch” with a “Contains: Wheat” allergen callout. It doesn’t.
FDA Position on OTC Drugs and Gluten
Per the FDA’s Medications and Gluten page: “The FDA is aware of no oral drug products currently marketed in the United States that contain wheat gluten or wheat flour intentionally added as an inactive ingredient.” Worst-case estimated exposure from a single drug dose: 0.5 mg gluten — one-twentieth of the typical celiac-safe daily threshold.
The FDA’s gluten-free food labeling rule (21 CFR 101.91) applies to food, not drugs. Sanofi has not pursued the FDA’s voluntary drug gluten-free statement on Allegra packaging. This is a corporate labeling choice, not an indication that gluten is present.
Cross-Contamination Risk
Manufacturing
Low
- Sanofi’s published inactive ingredients contain no wheat-derived components.
- FDA estimates worst-case gluten dose from any oral drug at no more than 0.5 mg per unit.
- Not formally labeled “Gluten Free”; not GFCO-certified.
- Gluten Free Watchdog has tested Allegra; test reports are paywalled.
Pharmacy / Retail
Low
- Sealed manufacturer packaging — no realistic pharmacy-floor cross-contact.
- Generic fexofenadine (Costco Kirkland, Amazon Basic Care, store brands) uses different inactive ingredients — verify each.
Home
Low
- Sealed bottle or blister pack; standard storage.
Allegra Variants — Quick Reference
- Allegra Allergy 24 Hour Tablets (180 mg) — most common variant; corn-derived inactives.
- Allegra Allergy 12 Hour Tablets (60 mg) — same inactive-ingredient profile as 180 mg.
- Allegra Children’s Chewable (30 mg) — different inactive ingredients (added flavorings, sweeteners) — verify on the Drug Facts label.
- Allegra Children’s Oral Suspension — liquid base, different inactives entirely; severely sensitive pediatric patients should consult a pharmacist.
- Allegra-D 12 / 24 Hour — combines fexofenadine with pseudoephedrine; similar inactive-ingredient profile to standard Allegra.
- Allegra Hives (180 mg) — same active and inactives as Allegra Allergy 24 Hour.
Practical Options for Severely Sensitive Celiacs
- Read the current Drug Facts label. Any wheat-derived inactive would carry a “Contains: Wheat” allergen callout per FDA rules.
- Call a pharmacist for verification of the specific lot’s inactive ingredients.
- Compare generics. Different generic fexofenadine manufacturers use different fillers; the active ingredient is identical.
- Consider alternative antihistamines. Claritin (loratadine), Zyrtec (cetirizine), and Xyzal (levocetirizine) are separate medications with their own gluten profiles — each has its own article on this site.
- Subscribe to Gluten Free Watchdog for per-product test reports if your sensitivity warrants it.
Frequently Asked Questions
Is Allegra gluten-free?
Allegra’s inactive ingredients per Sanofi’s DailyMed label contain no wheat-derived components; the pregelatinized starch is corn-derived. The active ingredient fexofenadine is gluten-free by chemistry. For most celiacs Allegra is considered safe. However, Allegra is not formally labeled “Gluten Free” — OTC drugs are not covered by FDA’s 21 CFR 101.91 food labeling rule. Severely sensitive celiacs should check the current Drug Facts label and consider pharmacist verification.
Is Allegra-D gluten-free?
Allegra-D combines fexofenadine with pseudoephedrine in an extended-release formulation. The inactive-ingredient profile is similar to standard Allegra and includes no wheat-derived components per Sanofi. Same caveats apply — not formally labeled gluten-free, OTC drugs not covered by FDA food labeling rule.
Is Children’s Allegra gluten-free?
Allegra Children’s Chewable and Oral Suspension use different inactive ingredients than the adult tablet — chewables include added flavorings and sweeteners; the oral suspension uses a liquid base. Both forms are generally treated as gluten-free, but severely sensitive pediatric celiac patients should have a pharmacist verify the specific formulation. The active ingredient (fexofenadine HCl) is gluten-free.
Is generic fexofenadine gluten-free?
The active ingredient (fexofenadine HCl) is identical across Allegra and all generics. The inactive ingredients differ by manufacturer. Major generic fexofenadine brands (Costco Kirkland, Amazon Basic Care, CVS Health, Walgreens) generally use gluten-free fillers, but each manufacturer’s specific formulation should be verified on the Drug Facts label. Some store brands carry voluntary “Gluten Free” labeling that Allegra itself does not.
Why isn’t Allegra formally labeled gluten-free?
The FDA’s gluten-free labeling rule (21 CFR 101.91) applies to food, not OTC drugs. The FDA has issued voluntary labeling guidance for drug manufacturers, but adoption is patchy. Sanofi has not pursued the voluntary FDA gluten-free statement on Allegra packaging. The Gluten in Medicine Disclosure Act, which would make drug gluten labeling mandatory, has been introduced in Congress repeatedly since 2019 but has not been passed.
What’s the most reliably gluten-free antihistamine?
Allegra, Claritin, and Zyrtec are all widely treated as gluten-free by celiac advocacy groups based on their published inactive-ingredient lists. None of the three is formally labeled “Gluten Free” — the OTC drug labeling rule does not require it. For severely sensitive celiacs, the most reliable approach is to find a specific generic store-brand antihistamine that carries voluntary “Gluten Free” labeling, or to consult a pharmacist for lot-specific verification.