Per the ZYRTEC ® OTC Drug Facts label, only one dose of ZYRTEC ® should be taken per day, as it is a 24h medication. You can take two doses of ZYRTEC-D ® , but only one dose every 12 hours. With Children’s Zyrtec ® Syrup, for children 2 to under 6 years of age: 2.5 mL once daily is the recommended dose.

Giving your child Zyrtec? Find the recommended dose to safely give your child based on weight and age with the St. Louis Children's Hospital infant and child medication dosage table.

Find the right dose on the chart below. 2.5 mL once daily. If needed, dose can be increased to a maximum of 5 mL once daily or 2.5 mL every 12 hours. Do not give more than 5 mL in 24 hours. 5 mL or 10 mL once daily depending upon severity of symptoms; do not take more than 10 mL in 24 hours. DO NOT TAKE more than directed.

The bottle of Children's Zyrtec will say it is only safe for children 2 years and older. In reality, this medication is safe to give to children younger than 2, but it's important you receive the go ahead from your provider before doing so. These doses can be given every 24 hours if the symptoms continue.

The typical Zyrtec dosage for people ages 6 to 64 years old is 5 mg to 10 mg once daily, depending on the severity of allergies. For children 2 to 5 years old, the typical dosage is 2.5 mg to 5 mg a day. For adults ages 65 and