What side effects may I notice from receiving Levocetirizine?

Side effects that you should report to your care team as soon as possible:
-Allergic reactions—skin rash, itching, hives, swelling of the face, lips, tongue, or throat
-Trouble passing urine
Side effects that usually do not require medical attention (report to your care team if they continue or are bothersome):
-Drowsiness
-Dry mouth
-Headache
-Fatigue

This list may not describe all possible side effects for Levocetirizine. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.