Medically reviewed by Daniel More, MD Common side effects of Zyrtec (cetirizine) can include drowsiness, fatigue, dry mouth, ...

Dissolve tabs: may take with or without water. For doses <5mg: use syrup. <2yrs: not recommended. 2–6yrs: initially 2.5mg once daily; max 5mg once daily or 2.5mg every 12hrs. ≥6yrs: ...

Dosage guidance for Children's Zyrtec Allergy Relief syrup is: Ages 2 to under 6: Take 2.5 milliliters (mL) once a day. If ...

Cetirizine HCl 10mg; citrus flavor. Dissolve tabs: may take with or without water. For doses <5mg: use syrup. <2yrs: not recommended. 2–6yrs: initially 2.5mg once daily; max 5mg once daily or 2 ...