Cetirizine is a long-lasting antihistamine and combats allergies like hay fever, chronic and nettle rash.
Levocetirizine is a non-sedative (third-generation) antihistamine developed from Cetirizine (a second-generation antihistamine). Also a long-lasting antihistamine, Levocetirizine relieves the same allergic symptoms as Cetirizine by inhibiting the actions of histamine.Of the two drugs, Levocetirizine binds more effectively to the receptor sites. Both drugs, however, are similarly effective against allergies.