Pataday for itchy eyes: what to know

Pataday is an antihistamine eye drop used for allergy-related itching. Allergic inflammation can cause watering, redness and a gritty sensation in both eyes, often alongside sneezing or a blocked, runny nose. [Allergic Conjunctivitis](/conditions/allergic-conjunctivitis/) is a common context; triggers may include [House Dust Mite Allergy](/conditions/house-dust-mite-allergy/) or [Pet Allergy](/conditions/pet-allergy/).

Itchy eyes can have other causes, including irritation, infection, contact-lens problems or dry eye. [Allergic Rhinitis](/conditions/allergic-rhinitis/) may explain nose symptoms but does not account for every eye problem.

Follow the product label or a clinician’s instructions. Wash your hands, avoid touching the bottle tip to the eye or skin, and remove contact lenses if the label advises it. A cool compress and avoiding the suspected trigger may also help. Do not share eye drops. Ask a pharmacist or clinician whether [Allergy Medication](/treatments/medical-management/allergy-medication/) fits your symptoms and other medicines.

Seek urgent eye care for severe pain, light sensitivity, sudden vision change, a chemical splash, an eye injury, marked swelling, or a feeling that something is trapped in the eye. Prompt review is needed for thick discharge, one-sided worsening redness, or symptoms that do not improve as expected. Stop the drops and seek advice if a new reaction develops.

Ask whether your symptoms fit allergy, how long to try the drops, whether contact lenses are safe, and what changes mean the diagnosis should be reconsidered. Mention other eye products and any history of eye disease.