You can safely give Zyrtec to your dog up to 20 mg per day. It should only be administered orally. You can see a quick ...

Cetirizine HCl 10mg; contains gelatin. 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 ...

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: ...

or four tablets (10 mg) once a day, depending on symptom severity. Dosage guidance for Children's Zyrtec Allergy Relief syrup ...