Cetirizine may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:
- excessive tiredness
- dry mouth
- stomach pain
Some side effects can be serious. The following symptom is uncommon, but if you experience it, call your doctor immediately:
- difficulty breathing or swallowing
Cetirizine may cause other side effects. Call your doctor if you have any unusual problems while taking this medication.