ALLEGRA HIVES vs OLOPATADINE HYDROCHLORIDE

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated August 21, 2026·How we rate

Possible drug interaction. ALLEGRA HIVES and OLOPATADINE HYDROCHLORIDE are different prescription medicines. Combining or switching between them can cause interactions — talk to a pharmacist or prescriber before making changes. This page is not medical advice.

Attribute	ALLEGRA HIVES	OLOPATADINE HYDROCHLORIDE
Rating	New	66/100
Pharmacy pays	~$7.33 /30	$1.23 /g
Type	RX	RX
Active ingredient	FEXOFENADINE HYDROCHLORIDE	OLOPATADINE HYDROCHLORIDE
Manufacturer	Chattem Sanofi	Apotex
Dosage forms	Tablet	Solution, Drops, Spray/Inhaler, Spray/Inhaler, metered
Drug class	Histamine-1 Receptor Antagonist	Histamine-1 Receptor Antagonist
Boxed warning	None	None
Half-life	about 14 hours (label: mean elimination half-life 14.4 hours)	—
Treats	Perennial Allergic Rhinitis, Urticaria	Allergic Conjunctivitis

allegra hives olopatadine hydrochloride

Rating

New

66/100

Pharmacy pays

~$7.33 /30

$1.23 /g

Type

Active ingredient

FEXOFENADINE HYDROCHLORIDE

OLOPATADINE HYDROCHLORIDE

Manufacturer

Chattem Sanofi

Apotex

Dosage forms

Tablet

Solution, Drops, Spray/Inhaler, Spray/Inhaler, metered

Drug class

Histamine-1 Receptor Antagonist

Boxed warning

None

Half-life

about 14 hours (label: mean elimination half-life 14.4 hours)

—

Treats

Perennial Allergic Rhinitis, Urticaria

Allergic Conjunctivitis

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Frequently asked questions

What is the difference between Allegra Hives and Olopatadine Hydrochloride?

Allegra Hives contains Fexofenadine Hydrochloride, while Olopatadine Hydrochloride contains Olopatadine Hydrochloride — they have different active ingredients.

Ratings are based on FDA regulatory (recall-safety) data. This comparison is for general reference only — not medical advice. Always consult a licensed professional before choosing or switching a medication.