Trusted Prescription Drug Information

• Stop taking Zyrtec and seek emergency medical attention if you experience an allergic reaction (difficulty breathing; closing of your throat; swelling of your lips, tongue, or face; or hives).
• Other, less serious side effects may be more likely to occur. Continue to take cetirizine and talk to your doctor if you experience
· sleepiness, fatigue, or dizziness;
· headache; or
· dry mouth.
• Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.