Loratadine is an antihistamine medication widely used to alleviate symptoms associated with allergies, such as hay fever (allergic rhinitis) and hives (urticaria). It works by blocking the action of histamine, a substance in the body that triggers allergic reactions, thereby reducing symptoms like sneezing, itching, runny nose, and watery eyes. Unlike older generation antihistamines, loratadine is less likely to cause drowsiness or sedation due to its minimal penetration of the blood-brain barrier. This makes it a preferred choice for individuals who need relief from allergy symptoms while maintaining alertness and cognitive function throughout the day.

One of the key features of loratadine is its long-lasting effect, providing relief from allergy symptoms for up to 24 hours with a single daily dose. It is available in various formulations, including tablets, orally disintegrating tablets, and liquid suspensions, offering flexibility in dosing options to suit different age groups and preferences. Loratadine is generally well-tolerated, with few reported side effects such as headache, dry mouth, and fatigue, which are typically mild and transient. It is suitable for both adults and children, making it a popular choice for managing seasonal and perennial allergies effectively.