Both Zyrtec and Zyrtec-D provide relief from allergy symptoms. They both contain cetirizine, an antihistamine. Antihistamines are a class of medications that help relieve allergy symptoms by ...

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

The dozens of types of allergy medication found at ... Don't hesitate to use generic brands. The same anti-histamine in Zyrtec, for example, is available as Aller-Tec at Costco, Wal-Zyr at ...