Dosage for Babies and the Maximum Dosage
Children younger than 6 years should stay away from over-the-counter oral Benadryl products. Benadryl creams and other products that are applied to the skin are not approved for children younger than 2 years.
It is important to speak with your healthcare provider before giving your baby Benadryl. The symptoms of your baby must be evaluated by your doctor, before prescribing the most appropriate dosage of the drug.
Maximum dosage is the total quantity of daily intake of drug that should not be exceeded. For example, oral Benadryl products should not be taken more than 6 times a day. For adults and children older than 12 years, the maximum dosage is 300 mg per day. Children between ages 6 to 12 years should not take more than 150 mg per day.
Children and adults should not apply Benadryl products like the spray, gel, and cream more than 4 times a day.