Hello, I don't know if you ever found the answer for this but for anyone coming across this desloratadine could potentially be problematic for pregnancy. There have been animal studies showing it can be harmful to the fetus and could potentially influence the mother to be not as fit to bear the child. There haven't been any human studies done but this is warned against.
Reference: https://www.drugs.com/pregnancy/desloratadine.html
Aerius (5 mg desloratadine) 1pill a day for 1 week.
What kind were you taking?