teaspoon of syrup every 24 hours (maximum 5 mg per day). However, consult your pediatrician before treating children under 2 with Zyrtec. Zyrtec is taken with or without food. Measure the syrup ...

Ages 6 and older: Chew and swallow two tablets 5 milligrams (mg) or four tablets (10 mg) once a day, depending on symptom ...