Over-the-counter medication · Antihistamine / Mast Cell Stabilizer (Ophthalmic)
ketotifen ophthalmic
Also sold as Zaditor, Alaway. These eye drops treat itchy eyes caused by allergies.
Data updated 2026-05-15
- $0.86
- Brand price (NADAC)
ketotifen ophthalmic (Zaditor) is an over-the-counter Antihistamine / Mast Cell Stabilizer (Ophthalmic). These eye drops treat itchy eyes caused by allergies.
Ketotifen eye drops help relieve itchy eyes. They work by blocking histamine and stabilizing mast cells in your eyes.
Verify with FDA → · CMS NADAC pricing →
Drug Pricing (NADAC)
Brand Price
$0.86/unit
Generic Price
$1.24/unit
Generic Available
Yes (3 manufacturers)
Pricing data from NADAC (CMS), effective December 18, 2024. Compare all drug costs →
What it does
These eye drops treat itchy eyes caused by allergies.
Common side effects
No common side effects listed.
Key warnings
No specific warnings noted. Always follow your prescriber's instructions.
The sections below are summarized in plain English from ketotifen ophthalmic's FDA-approved prescribing information. They describe what the official label says, and are not personal medical advice.
How It Works
Ketotifen is an antihistamine and mast cell stabilizer. It blocks histamine, a substance that causes allergic symptoms. It also prevents mast cells from releasing substances that cause itching.
Common Questions
What is ketotifen?
How often can I use these eye drops?
Can children use these eye drops?
What if I wear contact lenses?
Can I use these eye drops for other eye problems?
What should I do if the itching gets worse?
How long does it take for the drops to work?
Can I use these with other eye drops?
What if I accidentally swallow some of the eye drops?
How should I throw away the bottle when I'm done?
What drug class is ketotifen ophthalmic?
What pregnancy or breastfeeding source fields are listed for ketotifen ophthalmic?
Related Medications in Antihistamine / Mast Cell Stabilizer (Ophthalmic)
Other drugs grouped near ketotifen ophthalmic - same-class peers and common alternatives.
azelastine
Astelin, Astepro
Azelastine nasal spray is an antihistamine medicine.
Compare with ketotifen ophthalmic →
budesonide nasal
Rhinocort
Rhinocort is a nasal spray that helps relieve allergy symptoms.
Compare with ketotifen ophthalmic →
cetirizine
Zyrtec
Cetirizine (Zyrtec) is an antihistamine medicine.
Compare with ketotifen ophthalmic →
chlorpheniramine
Chlor-Trimeton
Chlorpheniramine is an antihistamine medicine.
Compare with ketotifen ophthalmic →
ciclesonide nasal
Omnaris, Zetonna
Omnaris Nasal Spray is a medicine that helps treat allergy symptoms in your nose.
Compare with ketotifen ophthalmic →
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What the FDA Data Shows for ketotifen ophthalmic
The FDA label for ketotifen ophthalmic (sold under brand names such as Zaditor, Alaway) classifies it as an over-the-counter product in the Antihistamine / Mast Cell Stabilizer (Ophthalmic) class. These eye drops treat itchy eyes caused by allergies. Labeling covers dosing, contraindications, and monitoring requirements derived from clinical trials.
Post-market surveillance from the FDA Adverse Event Reporting System (FAERS) captures real-world experience. Voluntary reports accumulate over the lifetime of a drug and reflect wide-ranging clinical use. Interaction data is drawn directly from FDA-approved prescribing information. NADAC pricing from CMS shows a generic unit cost of $1.24 versus $0.86 for the brand.
Report counts do not establish causation, a FAERS entry documents a temporal association, not proof that the drug produced the outcome. Widely prescribed medications naturally accumulate more reports than niche therapies, so raw totals must be interpreted alongside total exposure. Shortage status, recall history, and patent information are separate source-record fields. This page is a public FDA/CMS registry and does not provide medical, treatment, substitution, or medication-change directions.
Data Sources
Drug labeling: FDA Drug Labels (SPL/DailyMed). Adverse events: FDA Adverse Event Reporting System (FAERS). Pricing: CMS National Average Drug Acquisition Cost (NADAC).
FAERS reports are voluntary and do not establish causation. Drug interactions are derived from FDA labeling and clinical references. This registry does not provide medication decisions.
Last updated: December 15, 2023
PlainMeds is rendered directly from FDA openFDA/FAERS extracts, DailyMed labels, and CMS drug-pricing files, no number is typed in by an editor. FAERS counts, recalls, shortages, and price figures on this page are queried live from those federal extracts. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026-05-15. Primary sources: openFDA / FAERS, DailyMed and CMS Part B ASP.
Read our methodology - how this data is sourced, computed, and verified.
Data currency: FDA FAERS adverse-event reports through 2025, CMS NADAC acquisition-cost pricing effective December 2024, compiled from the source snapshot dated . See our methodology for per-source dates and refresh cadence. Spot a figure that looks wrong? Report a data issue.
All federal data sources used on this page
- FDA Orange Book - approved drug products with therapeutic equivalence. accessdata.fda.gov/cder/ob
- FDA DailyMed - NIH-hosted drug labeling for FDA-approved meds. dailymed.nlm.nih.gov
- FDA Adverse Event Reporting System (FAERS) - post-marketing safety surveillance. fda.gov/drugs/faers
- NLM RxNorm - standardized clinical drug nomenclature. nlm.nih.gov/research/umls/rxnorm
- CMS Medicare Part B Drug Average Sales Price Files - federal drug pricing data. cms.gov/medicare/part-b-drugs/asp
- FDA Drug Shortages Database - current and resolved drug shortage tracking. accessdata.fda.gov/drugshortages