Each medication tackles allergy symptoms differently. Zyrtec contains cetirizine, a second-generation antihistamine. Cetirizine blocks histamine receptors, preventing histamine from triggering allergy symptoms like sneezing, itching, and runny nose. It’s known for its longer duration of action compared to other options.
Claritin uses loratadine, another second-generation antihistamine. Similar to cetirizine, loratadine effectively blocks histamine receptors. However, it may cause fewer sedative effects than some first-generation antihistamines.
Allegra contains fexofenadine, a third-generation antihistamine. Like the previous two, it’s a histamine receptor blocker. Fexofenadine is noted for its low potential for drowsiness. This makes it a popular choice for those who need to remain alert during the day.
Key Differences: While all three block histamine, they differ in how quickly they work, how long the effects last, and their likelihood of causing drowsiness. Choosing the right medication depends on individual needs and preferences.
