Medication class
Allergies
Antihistamines, nasal sprays, and other medications for seasonal allergies, hay fever, and allergic reactions.
Data updated 2026-05-15
- 19
- Medications
- 14
- With a generic
- 71%
- Avg generic savings
- 0
- In active shortage
Drug class assignments follow the FDA openFDA therapeutic classification, clinical details are drawn from FDA Structured Product Labeling via DailyMed, and unit-price comparisons use CMS National Average Drug Acquisition Cost data. See the full sources below.
Inventory versus report volume
Allergies is inventory #16 of 22 (19 drugs) ≠ FAERS-volume #17. Nationally Mental Health is inventory #1 of 22 (77 drugs) ≠ Pain Relief FAERS-volume #1 at inventory #3.
- #16
- inventory
- 19
- tracked drugs
- #17
- FAERS volume
- #1
- Pain Relief FAERS nationally
According to FDA FAERS report totals and openFDA class inventory compiled on /methodology. Class size is not the same map as report volume. This page is for informational purposes only and is not medical advice.
This class - generic availability cut
Exclusive DISTINCT-drug split of 19 medicines in Allergies. Orthogonal to inventory vs FAERS dual and to the NADAC cost ChartBar.
ciclesonide nasal tops Allergies NADAC at $23.00/unit
Top 10 acquisition costs in this class (CMS NADAC)
- ciclesonide nasal
ciclesonide nasal
$23 per unit
- desloratadine $8
desloratadine
$8 per unit
- fluticasone $3
fluticasone
$3 per unit
- mometasone nasal $1
mometasone nasal
$1 per unit
- olopatadine nasal $1
olopatadine nasal
$1 per unit
- ketotifen ophthalmic $1
ketotifen ophthalmic
$1 per unit
- loratadine $1
loratadine
$1 per unit
- azelastine $0
azelastine
$0 per unit
- fexofenadine $0
fexofenadine
$0 per unit
- hydroxyzine $0
hydroxyzine
$0 per unit
What this shows ciclesonide nasal is the costliest in this class at $23.00/unit; generics in the same class run a fraction of that.
Allergies · #16 inventory of 22 therapeutic classes
6 classes have fewer tracked drugs; percentile 27 among PlainMeds categories.
Allergies vs all classes by tracked-drug count
Where this class's inventory sits among every PlainMeds therapeutic category
19 16th of 22 higher than 6 of 22 classes
Classes, banded by tracked-drug inventory
Each bar is a band; taller bars hold more classes. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source PlainMeds openFDA therapeutic-class inventory · 2026-05-15
azelastine OTC
Astelin, Astepro
Azelastine nasal spray is an antihistamine medicine.
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budesonide nasal OTC
Rhinocort
Rhinocort is a nasal spray that helps relieve allergy symptoms.
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cetirizine OTC
Zyrtec
Cetirizine (Zyrtec) is an antihistamine medicine.
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chlorpheniramine OTC
Chlor-Trimeton
Chlorpheniramine is an antihistamine medicine.
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ciclesonide nasal
Omnaris, Zetonna
Omnaris Nasal Spray is a medicine that helps treat allergy symptoms in your nose.
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desloratadine
Clarinex
Desloratadine is an antihistamine medicine.
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diphenhydramine OTC
Benadryl
Diphenhydramine, also known as Benadryl, is an antihistamine medicine.
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fexofenadine OTC
Allegra
Fexofenadine (Allegra) is an antihistamine medicine.
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fluticasone OTC
Flonase, Flovent
Fluticasone is a steroid medicine that helps reduce inflammation in your nose.
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fluticasone nasal OTC
Flonase
Fluticasone nasal spray helps relieve allergy symptoms.
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hydroxyzine
Vistaril, Atarax
Hydroxyzine is an antihistamine that can also help with anxiety.
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ketotifen ophthalmic OTC
Zaditor, Alaway
Ketotifen eye drops help relieve itchy eyes.
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levocetirizine OTC
Xyzal
Levocetirizine is an antihistamine medicine.
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loratadine OTC
Claritin
Loratadine is an antihistamine medicine.
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meclizine OTC
Antivert, Bonine
Meclizine is an antihistamine and antiemetic.
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mometasone nasal
Nasonex
Mometasone nasal spray helps relieve allergy symptoms.
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olopatadine nasal
Patanase
Olopatadine nasal spray is a medicine that helps with allergy symptoms.
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olopatadine ophthalmic OTC
Patanol, Pataday
Olopatadine eye drops help with itchy and red eyes.
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triamcinolone nasal OTC
Nasacort
Nasacort is a nasal spray that helps relieve allergy symptoms.
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Allergies · compact therapeutic class (19 tracked medicines)
Allergies is inventory #16 of 22 (19 drugs) ≠ FAERS-volume #17. Nationally Mental Health is inventory #1 of 22 (77 drugs) ≠ Pain Relief FAERS-volume #1 at inventory #3. 19 medicines tracked; 14 carry a NADAC generic flag.
Classes nearest Allergies by inventory size
Read our methodology - how this data is sourced, computed, and verified.