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 contac..