<unk>  (trade names Clarinex and Aerius) is a tricyclic H1 antagonist that is used to treat allergies. It is an active metabolite of loratadine. It was patented in 1984 and came into medical use in 2001.
Desloratadine
Loratadine
Rupatadine
Diquafosol
Olopatadine
Tiratricol
Terfenadine
Tralomethrin