Desloratadine
"I used this drug for controlling allergy to dust, mold etc. It took a while to work for me. It is not quick acting such as Benadryl. Once you have taken Clarinex for about a month it has controlled my allergies quite well. However, after using the drug for years I have some breakthrough allergies and have to use Benadryl anyway. I have a lot of low grade headaches, palpitations (which may be stress or the drug), and have developed over the years dyshydrotic eczema or something like it. "