When you have itchy eyes from allergies, look to LASTACAFT Once Daily Relief Antihistamine Eye Drops. Prescription-strength LASTACAFT is clinically proven to relieve eye itching due to allergies in as little as 3 minutes and lasts up to 24 hours.* (*Based on 16-24 hour studies.) So how does LASTACAFT work? When allergens in the air come into contact with your eyes, histamine is released which is the bodys natural defense mechanism that causes an allergic response which can make your eyes itch. Only LASTACAFTs patented, prescription-strength formula contains the active ingredient Alcaftadine 0.25%, an ophthalmic antihistamine that relieves eye itching from allergies also known as allergic conjunctivitis. Once daily LASTACAFT relieves itchy allergy eyes by 1) blocking histamine H1 receptors and 2) preventing further release of more histamine in the eye. Unlike oral antihistamine allergy medications, LASTACAFT is applied directly to the eye. LASTACAFT works in minutes against both seasonal and year-round allergens which include pollen, grass, ragweed, animal hair, and pet dander so that youre covered indoors and outdoors throughout the day. The patented, prescription-strength formula of LASTACAFT is tough on eye itch from allergies yet can be given to children as young as 2 years of age. Its also a great value. Each bottle of LASTACAFT Once Daily Relief contains a 60-day supply and is FSA and HSA eligible. So, when it comes to relieving itchy allergy eyes, no matter the season, ITS LASTACAFT SEASON.