A common adult Claritin dosage is 10 mg by mouth once a day. Kids ages 6 years and older can also take this dose. Children ages 2 to 5 years old can take 5 mg of Claritin once a day. This medication isn’t typically recommended for kids under 2 years old. Claritin is available OTC as a brand-name medication. Not recommended for relief of cold symptoms. Not recommended under the age of 2 years. Timing: You may give a dose of loratadine (Claritin) once daily. Use these claritin dosage guides for infants and children younger than 12 years old. The short answer is no: Claritin is not recommended for infants under 2 years old due to insufficient safety data and potential risks associated with its use. Parents should prioritize allergen avoidance strategies combined with pediatric guidance before considering any medication options. Children's Claritin dosage chart. Non-drowsy loratadine dosing for allergies in children 2 years and older. Adults and children 6 years and over: 2 Teaspoonful daily, do not take more than 2 teaspoonful in 24-hour. Children 2 to under 6 years of age: 1 Teaspoonful daily, do not take more than 1 teaspoonful in 24-hour. Find the recommended dose to safely give your child based on weight and age with the infant and child medication dosage table from St. Louis Children's Hospital. For allergies, don't use under 2 years of age. Reason: not FDA approved. For age 2 - 6 years, talk with your child's doctor before using. For colds, not advised at any age. Reason: no proven benefits. Dose. Find the child's age in the top row of the dose table. Look below the correct age for the dose based on the product you have. Measure the Dose. Find out about Claritin side effects, warnings, and more to help you decide if it's a good choice for your child. Both Claritin (loratadine) and Allegra (fexofenadine) are safe and FDA-approved for use in 2-year-old children, with loratadine dosed at 5 mg once daily and fexofenadine at 30 mg twice daily. 1.