<unk>  is a second generation antihistamine and PAF antagonist used to treat allergies. It was discovered and developed by J. Uriach y Cia, S. A. and is marketed under several trade names such as Rupafin, Alergoliber, Rinialer, Pafinur, Rupax and Ralif.
Rupatadine
Loratadine
Olopatadine 
Tromantadine
Visnadine
Desloratadine
Azatadine
Rimantadine