Common side effects of Zyrtec (cetirizine) can include drowsiness, fatigue, dry mouth, sore throat, and dizziness. Less common side effects include headaches, and nausea. Diarrhea and coughing have ...

Symptoms of a Zyrtec overdose may include restlessness, irritability, and/or drowsiness. When to Seek Help If you think your ...

As with other drugs, cetirizine can cause side effects, such as drowsiness and sore throat. If you are not able to tolerate side effects from cetirizine, talk with your doctor or pharmacist.

It contains 2 medications: cetirizine and pseudoephedrine. Cetirizine is an antihistamine and works by blocking a certain natural substance (histamine) that your body makes during an allergic ...

It contains 2 medications: cetirizine and pseudoephedrine. Cetirizine is an antihistamine and works by blocking a certain natural substance (histamine) that your body makes during an allergic ...