fexofenadine vs loratadine
PlainMeds reviewed this comparison against our methodology in August 2026. It places FDA and CMS record fields side by side, without recommending either medication.
Side-by-side comparison of fexofenadine and loratadine. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
Allegra
Claritin
Fexofenadine (Allegra) is an antihistamine medicine. It helps reduce hives and relieve itching.
Loratadine is an antihistamine medicine. It helps relieve allergy symptoms.
This medicine treats hives and itching caused by hives. It will not stop hives or allergic skin reactions from happening. Talk to your doctor if you have questions about your condition.
This medicine treats allergy symptoms. It can help with a runny nose, itchy and watery eyes, and sneezing. It also helps with itching of the nose or throat caused by hay fever or other upper respiratory allergies.
Fexofenadine blocks histamine in your body. Histamine is a natural substance that causes allergy symptoms. By blocking histamine, fexofenadine reduces itching and hives.
Loratadine blocks histamine in your body. Histamine is a natural substance that causes allergy symptoms. By blocking it, loratadine reduces these symptoms.
- • Headache
- • Fatigue
- • Nausea
- • Headache
- • Fatigue
- • Drowsiness
- Headache 878
- Fatigue 858
- Nausea 778
- Pruritus 765
- Extra Dose Administered 700
- Fatigue 6,414
- Nausea 5,699
- Headache 5,201
- Dyspnoea 4,664
- Diarrhoea 4,663
No specific warnings noted.
No specific warnings noted.
It is not known if fexofenadine will harm your unborn baby. Talk to your doctor if you are pregnant or plan to become pregnant. It is also not known if fexofenadine passes into breast milk, so talk to your doctor if you are breastfeeding.
If you are pregnant or breastfeeding, talk to your doctor before taking loratadine. They can help you weigh the risks and benefits.
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How to Read This fexofenadine vs loratadine Comparison
fexofenadine is classified in the Second-Generation Antihistamine drug class, while loratadine sits within the Second-Generation Antihistamine class. Because both drugs share the same classification, they are often considered interchangeable in theory, but clinical outcomes rarely track that cleanly. Both drugs are available over the counter.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, fexofenadine has 3,979 submissions while loratadine has 26,641. Those figures reflect cumulative reporting volume, not per-patient risk, so older, widely dispensed drugs typically look worse on count alone. No direct interaction between these two drugs is listed in our FDA-derived dataset, though co-prescription still warrants pharmacist review. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot represent individual circumstances. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This registry does not provide medical, treatment, substitution, or medication-change directions for fexofenadine or loratadine.
Registry boundary: This comparison displays source-record fields and does not provide individualized medical direction.