The recommended maximum dosage of Claritin (loratadine) for adults and children 6 years and older is 10 mg once a day, which typically corresponds to one 10 mg tablet or the equivalent in liquid form. It is important not to exceed one dose (10 mg) in a 24-hour period. For children aged 2 to 5 years, the typical dose is 5 mg once daily. Claritin is not recommended for children under 2 years old without doctor advice. Taking more than the recommended dose may cause drowsiness or other side effects and requires urgent medical attention.