Altiva, or fexofenadine, is an exceptionally safe drug, and many patients have taken it for several years for such conditions as chronic urticaria and rhinitis without any side effects. If you have not yet tried nasal steroid sprays such as beclomethasone or fluticasone they are worth trying, as they reduce the inflammation in the nose and can be more effective in producing prolonged improvement than antihistamines such as fexofenadine.