Pataday is an eye drop used to treat allergic conjunctivitis, the itchy, red, watery eyes that flare up during allergy season or after exposure to pet dander, dust mites, and mold. It’s available over the counter in several strengths and works by targeting the allergic response directly in the eye.
How Pataday Relieves Eye Allergies
When allergens like pollen land on the surface of your eye, immune cells called mast cells release histamine, a chemical that triggers itching, redness, swelling, and tearing. Pataday’s active ingredient, olopatadine, fights this reaction in two ways. It blocks histamine from binding to receptors in your eye tissue, which stops itching almost immediately. It also stabilizes mast cells so they release less histamine in the first place, providing a preventive effect that lasts throughout the day.
This dual action is what separates Pataday from plain antihistamine drops or basic decongestant eye drops. Rather than just masking symptoms after they start, it helps prevent the allergic cascade from gaining momentum. That makes it particularly useful if you know you’ll be exposed to a trigger, like heading outside on a high-pollen day.
Available Strengths and Dosing
Pataday comes in three formulations, each with a different concentration of olopatadine:
- Pataday Twice Daily (0.1%): One drop in each affected eye, twice a day, roughly 6 to 8 hours apart.
- Pataday Once Daily (0.2%): One drop in each affected eye, once a day.
- Pataday Extra Strength (0.7%): One drop in each affected eye, once a day. This is the highest concentration and was originally prescription-only before moving to over-the-counter status.
For most people, the once-daily or extra-strength versions are more convenient and provide all-day relief from a single morning dose. The twice-daily version works well but requires you to remember a second application later in the day.
What Pataday Does Not Treat
Pataday is designed specifically for allergic eye symptoms. It won’t help with eye irritation caused by contact lenses, dry eye syndrome, or eye infections like pink eye (bacterial or viral conjunctivitis). If your eyes are red but the main symptom is grittiness or dryness rather than itching, the problem is likely something other than allergies, and Pataday won’t address the underlying cause.
Common Side Effects
Most people tolerate Pataday well. The most frequently reported side effects are mild and unrelated to the eyes themselves: headache, runny or stuffy nose, and sore throat. These typically resolve on their own.
Less common side effects involve the eyes directly. Some users experience brief stinging or burning when the drop hits the eye, temporary blurred vision, or a sensation of something in the eye. These usually last only a few seconds to a few minutes. More concerning signs, like significant eye pain, swelling of the eyelid or face, or difficulty breathing, are rare but warrant prompt medical attention.
Tips for Contact Lens Wearers
If you wear contact lenses, remove them before applying Pataday and wait at least 10 minutes before putting them back in. The drops contain a preservative that can be absorbed by soft contact lenses and cause irritation over time. If your eyes are already red, skip the contacts entirely until the redness clears.
How to Apply the Drops Correctly
Getting eye drops into your eye sounds simple, but poor technique is one of the most common reasons people feel like their drops aren’t working. A few steps make a real difference:
Start by washing your hands thoroughly. Tilt your head back slightly and look up. Use one hand to pull your lower eyelid down, creating a small pocket. Hold the dropper directly above that pocket without touching the bottle tip to your eye or eyelid, as contact can introduce bacteria into the bottle. Squeeze gently so a single drop falls into the pocket.
After the drop lands, close your eyes and press gently on the inner corner of your eye, where the eyelid meets your nose. Hold for about a minute. This keeps the medication on the surface of your eye instead of draining down through your tear ducts into your nose and throat, which is actually why some people notice a strange taste after using eye drops. Washing your hands again afterward is a good habit, especially if you’ll be touching other surfaces.
How Pataday Compares to Other Allergy Eye Drops
Over-the-counter allergy eye drops generally fall into three categories. Pure antihistamine drops block histamine but wear off quickly. Decongestant drops (often labeled “get the red out”) shrink blood vessels to reduce redness but don’t address itching, and they can cause rebound redness if used for more than a few days. Dual-action drops like Pataday both block histamine and stabilize mast cells, offering broader and longer-lasting relief without the rebound risk.
This combination approach is why Pataday has become one of the most widely recommended over-the-counter options for seasonal and year-round eye allergies. If you’re dealing with itchy eyes from pollen, pet dander, or dust, it targets the root allergic process rather than just temporarily masking one symptom at a time.