Top 5 Eye Allergy Drops in Canada for 2026
Published on Thursday, January 1, 2026
Quick answer: in Canada the eye allergy drops you can actually buy off the shelf are the ketotifen fumarate 0.035% products — Alaway and Zaditor — dosed one drop per eye twice daily for up to 12 hours of itch relief, and approved from age 3 up. This is the main way Canada differs from the United States: olopatadine (Pataday) and bepotastine (Bepreve) are both prescription-only here, even though the 0.7% Pataday strength sits on US drugstore shelves, so you need a prescriber for either one. Eye allergies flare for most Canadians through the pollen-heavy spring and summer months, and antihistamine drops are the fastest way to settle the itching, redness, and watering triggered by pollen, dust, and pet dander. The standard multi-dose bottles are preserved with benzalkonium chloride, so contact lens wearers should take lenses out first and wait about 10 minutes before putting them back in.
Top Picks Summary
Alaway Antihistamine Eye Drops
Alaway Antihistamine Eye Drops provide quick and effective relief from itchy eyes caused by allergens. Built around ketotifen fumarate 0.035% (equivalent to ketotifen 0.025%), they offer dual action—antihistamine plus mast-cell stabilizer—to target both the cause and the symptoms of eye allergies, with up to 12-hour relief from a twice-daily dose. The standard multi-dose bottle is preserved with benzalkonium chloride, so contact lens wearers should remove lenses before use and wait about 10 minutes before reinserting. Available over the counter in Canada, Alaway is a reliable pick for getting through pollen season comfortably.
Pataday Once Daily Relief Extra Strength
Pataday Once Daily Relief Extra Strength is an olopatadine hydrochloride 0.7% eye drop that blocks histamine and stabilizes mast cells, giving up to 24 hours of relief from allergic itching with a single drop per eye per day. Important for Canadian buyers: olopatadine ophthalmic solution is a prescription drug in Canada, so Pataday is not sold over the counter here the way it is in the United States — you need a prescription from a physician, optometrist, or other authorized prescriber. It is the highest-strength olopatadine available and a reasonable step up when twice-daily over-the-counter ketotifen is not controlling symptoms.
Zaditor Antihistamine Eye Drops
Zaditor Antihistamine Eye Drops are trusted for a fast-acting formula that provides up to 12 hours of relief from itchy eyes due to allergies. The active ingredient is ketotifen 0.025% (equivalent to ketotifen fumarate 0.035%), the same dual-action antihistamine and mast-cell stabilizer found in Alaway, dosed one drop in each eye twice daily. The standard multi-dose bottle is preserved with benzalkonium chloride, so it should not be used while wearing soft contact lenses—remove lenses first and wait at least 10 minutes before reinserting. Suitable for adults and children ages 3 and up and available over the counter, Zaditor is a long-standing favourite among allergy sufferers.
Bepreve (bepotastine besilate)
Bepreve (bepotastine besilate) is a prescription eye drop that provides effective relief from allergic conjunctivitis. Its unique formulation works by blocking harmful histamines and reducing inflammation, making it an exceptional choice for those facing persistent eye allergy symptoms. Bepreve offers fast and long-lasting relief that is clinically proven, setting it apart in the prescription eye care market. This product is a reliable option for individuals seeking targeted treatment.
OPTASE Allegro Eye Drops
OPTASE Allegro is a preservative-free lubricating eye drop built for allergy-related dry eye and environmental-irritant relief rather than a histamine-blocking antihistamine. It pairs hydroxyethylcellulose 0.35%, which coats and stabilizes the tear film, with ectoin, a naturally derived molecule that forms a protective hydro-shield over the ocular surface to guard against pollen, dust, and other airborne triggers. Because it is preservative-free and dispensed from a multidose bottle rated for 300 doses, it is gentle enough for frequent use and compatible with contact lenses. Choose Allegro to wash away and buffer allergens and soothe gritty, irritated eyes; pair it with an antihistamine drop such as Alaway or Pataday when the primary complaint is intense itching.
Quick-acting formula that targets common allergens for immediate comfort.
Understanding Eye Allergy Drops
Eye allergy drops are sterile ophthalmic solutions that calm the allergic reaction on the surface of the eye. What separates them from ordinary lubricating drops is an active ingredient that interrupts the histamine response rather than simply adding moisture.
The workhorse OTC ingredient in Canada is ketotifen fumarate 0.035%, a dual-action drug: it blocks the H1 histamine receptor for immediate itch relief and stabilizes mast cells so they release less histamine on the next exposure.
Because the mast-cell effect builds over time, these drops work best when started before or at the beginning of pollen season rather than only on the worst days.
Olopatadine and bepotastine are the same dual-action class at higher potency, but both require a prescription in Canada — a genuine difference from the US market, where the 0.7% olopatadine strength is sold over the counter.
Lubricating and rewetting drops are not antihistamines. They dilute and flush allergens off the ocular surface and ease grittiness, which is useful alongside an antihistamine but will not stop an established itch on its own.
Most multi-dose bottles use benzalkonium chloride as a preservative, which soft contact lenses absorb; remove lenses before instilling and wait roughly 10 minutes before reinserting.
Decongestant drops that promise to 'get the red out' are a separate category and can cause rebound redness with more than a few days of use, so they are not a substitute for an antihistamine drop.
Frequently Asked Questions
Which eye allergy drops can I buy without a prescription in Canada?
The ketotifen fumarate 0.035% drops — Alaway and Zaditor — are the over-the-counter options in Canada. Both are dual-action antihistamine and mast-cell stabilizers, dosed one drop in each eye twice daily for up to 12 hours of relief, and both are approved for ages 3 and up. Pataday (olopatadine) and Bepreve (bepotastine) are prescription-only in Canada, which differs from the United States where the 0.7% Pataday strength is sold over the counter.
Does Alaway Antihistamine Eye Drops last 12 hours?
Yes—Alaway (ketotifen fumarate 0.035%) is dosed twice daily and is described as effective for up to 12-hour relief; it's fast-acting, non-drowsy, and available over the counter. Note that the standard multi-dose bottle is preserved with benzalkonium chloride, so contact lens wearers should remove lenses before use and wait about 10 minutes before reinserting.
How does Pataday Once Daily Relief Extra Strength compare on cost in Canada?
Pataday is a prescription product in Canada, so there is no shelf price to compare against — what you pay depends on your pharmacy and whether a drug plan covers it, and you need a prescriber first. Among the drops you can simply buy, Zaditor runs roughly CA$10-20 and Alaway roughly CA$15-25 for a multi-dose bottle; both are twice-daily ketotifen. The once-daily convenience of olopatadine 0.7% is real, but in Canada it comes with a prescription requirement rather than a price premium.
Are Zaditor and Alaway preservative-free for daily use?
No—the standard multi-dose bottles of both Zaditor and Alaway contain the preservative benzalkonium chloride 0.01% per their Health Canada and FDA labelling. Only the separately sold single-dose-vial versions are preservative-free. If you wear soft contact lenses, remove them before instilling either drop and wait at least 10 minutes before reinserting. Zaditor is rated 4.4 and Alaway 4.5.
Conclusion
For most Canadians, an over-the-counter ketotifen drop taken twice daily is the practical starting point for itchy allergy eyes, with a lubricating drop added if the eyes also feel dry and gritty. If itching persists despite consistent use, that is the point to speak with a pharmacist, optometrist, or physician about a prescription option such as olopatadine or bepotastine — neither is available without a prescription in Canada. Persistent eye pain, light sensitivity, discharge, or any change in vision is not allergy and warrants prompt in-person assessment.