I would not be very worried.
It is unlikely he will have any side effects- There is a small chance of slight sedation- but this is uncommon with Claritin.
He should be fine, and nothing specific needs to be done- but if he does start acting funny/ different- see a doctor, or go to urgent care/ ER.
Always ask if you need clarification/more information.
If I have answered your question, please click the ACCEPT button so I can get credit for my work.
POSITIVE feedback & a BONUS are warmly appreciated. Please note that answers are for information only, do not take the place of an IN PERSON assessment by your doctor,and does not establish a patient-physician relationship.