Zyrtec (cetirizine) and Zyrtec-D (cetirizine and pseudoephedrine) have similar names and uses. However, the key difference between the medications is that, in addition to cetirizine, Zyrtec-D ...

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