Levocetirizine vs. Desloratadine side effects?

Usually mild. Both are very good antihistamines. Desloratadine: headache, upset stomach, dizziness, sore throat, dry mouth, muscle pain, extreme tiredness, painful menstruation. Levocetirizine: sleepiness, tiredness, weakness, sore throat, dry mouth, fever, cough, nosebleed.
Sedation. Both are antihistamines and are well tolerated, levocetirizine tends to be more sedating, although both can cause it. Minimal side effects except for dry mouth and eyes.